./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba --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 06:53:59,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 06:53:59,430 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 06:53:59,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 06:53:59,473 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 06:53:59,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 06:53:59,477 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 06:53:59,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 06:53:59,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 06:53:59,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 06:53:59,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 06:53:59,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 06:53:59,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 06:53:59,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 06:53:59,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 06:53:59,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 06:53:59,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 06:53:59,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 06:53:59,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 06:53:59,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 06:53:59,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 06:53:59,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 06:53:59,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 06:53:59,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 06:53:59,524 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 06:53:59,525 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 06:53:59,525 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 06:53:59,527 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 06:53:59,527 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 06:53:59,528 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 06:53:59,528 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 06:53:59,530 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 06:53:59,531 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 06:53:59,532 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 06:53:59,532 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 06:53:59,533 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 06:53:59,533 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 06:53:59,533 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 06:53:59,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 06:53:59,534 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 06:53:59,535 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 06:53:59,536 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 06:53:59,569 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 06:53:59,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 06:53:59,571 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 06:53:59,571 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 06:53:59,572 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 06:53:59,572 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 06:53:59,572 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 06:53:59,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 06:53:59,573 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 06:53:59,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 06:53:59,574 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 06:53:59,574 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 06:53:59,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 06:53:59,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 06:53:59,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 06:53:59,575 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 06:53:59,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 06:53:59,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 06:53:59,575 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 06:53:59,575 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 06:53:59,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 06:53:59,576 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 06:53:59,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 06:53:59,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 06:53:59,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 06:53:59,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 06:53:59,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 06:53:59,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 06:53:59,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 06:53:59,577 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 06:53:59,578 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 06:53:59,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 06:53:59,578 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 06:53:59,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 06:53:59,579 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 06:53:59,579 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 06:53:59,579 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 06:53:59,579 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 06:53:59,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 06:53:59,887 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 06:53:59,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 06:53:59,893 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 06:53:59,893 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 06:53:59,894 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-09-01 06:54:01,196 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 06:54:01,462 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 06:54:01,463 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-09-01 06:54:01,477 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbabd1c69/1dfeb135ffbb4ae2aac94cb51c53a442/FLAG874869e5a [2023-09-01 06:54:01,495 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbabd1c69/1dfeb135ffbb4ae2aac94cb51c53a442 [2023-09-01 06:54:01,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 06:54:01,499 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 06:54:01,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 06:54:01,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 06:54:01,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 06:54:01,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 06:54:01" (1/1) ... [2023-09-01 06:54:01,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55acb94c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:54:01, skipping insertion in model container [2023-09-01 06:54:01,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 06:54:01" (1/1) ... [2023-09-01 06:54:01,512 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 06:54:01,558 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 06:54:01,971 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2023-09-01 06:54:02,005 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 06:54:02,029 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 06:54:02,072 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2023-09-01 06:54:02,084 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 06:54:02,163 INFO L208 MainTranslator]: Completed translation [2023-09-01 06:54:02,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:54:02 WrapperNode [2023-09-01 06:54:02,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 06:54:02,165 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 06:54:02,166 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 06:54:02,166 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 06:54:02,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:54:02" (1/1) ... [2023-09-01 06:54:02,203 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:54:02" (1/1) ... [2023-09-01 06:54:02,240 INFO L138 Inliner]: procedures = 271, calls = 31, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 213 [2023-09-01 06:54:02,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 06:54:02,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 06:54:02,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 06:54:02,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 06:54:02,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:54:02" (1/1) ... [2023-09-01 06:54:02,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:54:02" (1/1) ... [2023-09-01 06:54:02,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:54:02" (1/1) ... [2023-09-01 06:54:02,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:54:02" (1/1) ... [2023-09-01 06:54:02,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:54:02" (1/1) ... [2023-09-01 06:54:02,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:54:02" (1/1) ... [2023-09-01 06:54:02,291 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:54:02" (1/1) ... [2023-09-01 06:54:02,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:54:02" (1/1) ... [2023-09-01 06:54:02,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 06:54:02,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 06:54:02,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 06:54:02,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 06:54:02,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:54:02" (1/1) ... [2023-09-01 06:54:02,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 06:54:02,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:54:02,328 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 06:54:02,339 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 06:54:02,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 06:54:02,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 06:54:02,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 06:54:02,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 06:54:02,366 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 06:54:02,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 06:54:02,367 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 06:54:02,367 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 06:54:02,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 06:54:02,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 06:54:02,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 06:54:02,369 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 06:54:02,552 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 06:54:02,554 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 06:54:02,785 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 06:54:02,793 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 06:54:02,793 INFO L302 CfgBuilder]: Removed 25 assume(true) statements. [2023-09-01 06:54:02,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 06:54:02 BoogieIcfgContainer [2023-09-01 06:54:02,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 06:54:02,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 06:54:02,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 06:54:02,800 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 06:54:02,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 06:54:01" (1/3) ... [2023-09-01 06:54:02,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18498443 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 06:54:02, skipping insertion in model container [2023-09-01 06:54:02,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:54:02" (2/3) ... [2023-09-01 06:54:02,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18498443 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 06:54:02, skipping insertion in model container [2023-09-01 06:54:02,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 06:54:02" (3/3) ... [2023-09-01 06:54:02,802 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2023-09-01 06:54:02,809 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 06:54:02,827 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 06:54:02,828 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-09-01 06:54:02,828 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 06:54:02,903 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 06:54:02,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 226 transitions, 460 flow [2023-09-01 06:54:03,043 INFO L130 PetriNetUnfolder]: 49/318 cut-off events. [2023-09-01 06:54:03,044 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 06:54:03,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 318 events. 49/318 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1228 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 181. Up to 8 conditions per place. [2023-09-01 06:54:03,054 INFO L82 GeneralOperation]: Start removeDead. Operand has 196 places, 226 transitions, 460 flow [2023-09-01 06:54:03,065 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 215 transitions, 435 flow [2023-09-01 06:54:03,069 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:54:03,086 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 215 transitions, 435 flow [2023-09-01 06:54:03,093 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 215 transitions, 435 flow [2023-09-01 06:54:03,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 215 transitions, 435 flow [2023-09-01 06:54:03,173 INFO L130 PetriNetUnfolder]: 48/307 cut-off events. [2023-09-01 06:54:03,174 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 06:54:03,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 307 events. 48/307 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1139 event pairs, 0 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 181. Up to 8 conditions per place. [2023-09-01 06:54:03,189 INFO L119 LiptonReduction]: Number of co-enabled transitions 16320 [2023-09-01 06:54:06,310 INFO L134 LiptonReduction]: Checked pairs total: 25651 [2023-09-01 06:54:06,310 INFO L136 LiptonReduction]: Total number of compositions: 189 [2023-09-01 06:54:06,324 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:54:06,329 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;@763055af, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:54:06,330 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:54:06,335 INFO L130 PetriNetUnfolder]: 10/43 cut-off events. [2023-09-01 06:54:06,335 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 06:54:06,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:54:06,336 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 06:54:06,337 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:54:06,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:54:06,341 INFO L85 PathProgramCache]: Analyzing trace with hash 559436854, now seen corresponding path program 1 times [2023-09-01 06:54:06,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:54:06,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213355363] [2023-09-01 06:54:06,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:54:06,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:54:06,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:54:06,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:54:06,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:54:06,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213355363] [2023-09-01 06:54:06,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213355363] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:54:06,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:54:06,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 06:54:06,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373377930] [2023-09-01 06:54:06,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:54:06,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 06:54:06,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:54:06,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 06:54:06,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 06:54:06,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 415 [2023-09-01 06:54:06,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 83 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 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 06:54:06,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:54:06,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 415 [2023-09-01 06:54:06,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:54:06,930 INFO L130 PetriNetUnfolder]: 598/1254 cut-off events. [2023-09-01 06:54:06,931 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 06:54:06,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2387 conditions, 1254 events. 598/1254 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7314 event pairs, 504 based on Foata normal form. 165/1007 useless extension candidates. Maximal degree in co-relation 2321. Up to 1127 conditions per place. [2023-09-01 06:54:06,935 INFO L137 encePairwiseOnDemand]: 390/415 looper letters, 30 selfloop transitions, 2 changer transitions 25/62 dead transitions. [2023-09-01 06:54:06,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 62 transitions, 233 flow [2023-09-01 06:54:06,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 06:54:06,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 06:54:06,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 648 transitions. [2023-09-01 06:54:06,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204819277108433 [2023-09-01 06:54:06,949 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 648 transitions. [2023-09-01 06:54:06,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 648 transitions. [2023-09-01 06:54:06,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:54:06,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 648 transitions. [2023-09-01 06:54:06,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 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 06:54:06,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 415.0) internal successors, (1660), 4 states have internal predecessors, (1660), 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 06:54:06,963 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 415.0) internal successors, (1660), 4 states have internal predecessors, (1660), 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 06:54:06,964 INFO L175 Difference]: Start difference. First operand has 60 places, 83 transitions, 171 flow. Second operand 3 states and 648 transitions. [2023-09-01 06:54:06,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 62 transitions, 233 flow [2023-09-01 06:54:06,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 62 transitions, 233 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 06:54:06,969 INFO L231 Difference]: Finished difference. Result has 62 places, 37 transitions, 89 flow [2023-09-01 06:54:06,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=62, PETRI_TRANSITIONS=37} [2023-09-01 06:54:06,973 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 2 predicate places. [2023-09-01 06:54:06,973 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 37 transitions, 89 flow [2023-09-01 06:54:06,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 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 06:54:06,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:54:06,974 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 06:54:06,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 06:54:06,975 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:54:06,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:54:06,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1876433692, now seen corresponding path program 1 times [2023-09-01 06:54:06,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:54:06,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575234877] [2023-09-01 06:54:06,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:54:06,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:54:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:54:07,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:54:07,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:54:07,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575234877] [2023-09-01 06:54:07,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575234877] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:54:07,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411347845] [2023-09-01 06:54:07,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:54:07,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:54:07,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:54:07,085 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 06:54:07,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 06:54:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:54:07,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 06:54:07,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:54:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:54:07,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:54:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:54:07,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411347845] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:54:07,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:54:07,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 06:54:07,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928680555] [2023-09-01 06:54:07,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:54:07,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 06:54:07,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:54:07,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 06:54:07,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 06:54:07,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 415 [2023-09-01 06:54:07,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 37 transitions, 89 flow. Second operand has 7 states, 7 states have (on average 191.57142857142858) internal successors, (1341), 7 states have internal predecessors, (1341), 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 06:54:07,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:54:07,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 415 [2023-09-01 06:54:07,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:54:07,439 INFO L130 PetriNetUnfolder]: 118/277 cut-off events. [2023-09-01 06:54:07,439 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 06:54:07,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 277 events. 118/277 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1048 event pairs, 105 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 533. Up to 249 conditions per place. [2023-09-01 06:54:07,441 INFO L137 encePairwiseOnDemand]: 412/415 looper letters, 30 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-09-01 06:54:07,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 40 transitions, 171 flow [2023-09-01 06:54:07,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 06:54:07,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 06:54:07,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1178 transitions. [2023-09-01 06:54:07,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47309236947791167 [2023-09-01 06:54:07,444 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1178 transitions. [2023-09-01 06:54:07,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1178 transitions. [2023-09-01 06:54:07,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:54:07,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1178 transitions. [2023-09-01 06:54:07,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 196.33333333333334) internal successors, (1178), 6 states have internal predecessors, (1178), 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 06:54:07,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 415.0) internal successors, (2905), 7 states have internal predecessors, (2905), 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 06:54:07,455 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 415.0) internal successors, (2905), 7 states have internal predecessors, (2905), 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 06:54:07,456 INFO L175 Difference]: Start difference. First operand has 62 places, 37 transitions, 89 flow. Second operand 6 states and 1178 transitions. [2023-09-01 06:54:07,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 40 transitions, 171 flow [2023-09-01 06:54:07,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 40 transitions, 167 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 06:54:07,458 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 121 flow [2023-09-01 06:54:07,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=121, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2023-09-01 06:54:07,459 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -14 predicate places. [2023-09-01 06:54:07,459 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 121 flow [2023-09-01 06:54:07,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 191.57142857142858) internal successors, (1341), 7 states have internal predecessors, (1341), 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 06:54:07,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:54:07,460 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-09-01 06:54:07,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 06:54:07,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:54:07,667 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:54:07,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:54:07,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1501176394, now seen corresponding path program 2 times [2023-09-01 06:54:07,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:54:07,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92538125] [2023-09-01 06:54:07,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:54:07,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:54:07,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:54:07,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:54:07,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:54:07,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92538125] [2023-09-01 06:54:07,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92538125] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:54:07,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013385976] [2023-09-01 06:54:07,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 06:54:07,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:54:07,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:54:07,828 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 06:54:07,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 06:54:07,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 06:54:07,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 06:54:07,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 06:54:07,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:54:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:54:07,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:54:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:54:07,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013385976] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:54:07,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:54:07,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 06:54:07,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185006430] [2023-09-01 06:54:07,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:54:07,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 06:54:07,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:54:07,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 06:54:07,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 06:54:08,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 415 [2023-09-01 06:54:08,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 121 flow. Second operand has 13 states, 13 states have (on average 191.30769230769232) internal successors, (2487), 13 states have internal predecessors, (2487), 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 06:54:08,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:54:08,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 415 [2023-09-01 06:54:08,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:54:08,146 INFO L130 PetriNetUnfolder]: 118/283 cut-off events. [2023-09-01 06:54:08,147 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-09-01 06:54:08,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 582 conditions, 283 events. 118/283 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1048 event pairs, 105 based on Foata normal form. 6/180 useless extension candidates. Maximal degree in co-relation 524. Up to 249 conditions per place. [2023-09-01 06:54:08,148 INFO L137 encePairwiseOnDemand]: 412/415 looper letters, 30 selfloop transitions, 11 changer transitions 0/46 dead transitions. [2023-09-01 06:54:08,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 46 transitions, 239 flow [2023-09-01 06:54:08,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 06:54:08,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 06:54:08,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2327 transitions. [2023-09-01 06:54:08,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4672690763052209 [2023-09-01 06:54:08,154 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2327 transitions. [2023-09-01 06:54:08,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2327 transitions. [2023-09-01 06:54:08,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:54:08,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2327 transitions. [2023-09-01 06:54:08,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 193.91666666666666) internal successors, (2327), 12 states have internal predecessors, (2327), 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 06:54:08,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 415.0) internal successors, (5395), 13 states have internal predecessors, (5395), 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 06:54:08,171 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 415.0) internal successors, (5395), 13 states have internal predecessors, (5395), 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 06:54:08,172 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 121 flow. Second operand 12 states and 2327 transitions. [2023-09-01 06:54:08,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 46 transitions, 239 flow [2023-09-01 06:54:08,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 46 transitions, 225 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 06:54:08,174 INFO L231 Difference]: Finished difference. Result has 62 places, 46 transitions, 191 flow [2023-09-01 06:54:08,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=191, PETRI_PLACES=62, PETRI_TRANSITIONS=46} [2023-09-01 06:54:08,175 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 2 predicate places. [2023-09-01 06:54:08,175 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 46 transitions, 191 flow [2023-09-01 06:54:08,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 191.30769230769232) internal successors, (2487), 13 states have internal predecessors, (2487), 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 06:54:08,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:54:08,177 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-09-01 06:54:08,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 06:54:08,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-09-01 06:54:08,384 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:54:08,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:54:08,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1182612490, now seen corresponding path program 3 times [2023-09-01 06:54:08,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:54:08,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482191854] [2023-09-01 06:54:08,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:54:08,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:54:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:54:08,429 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:54:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:54:08,468 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:54:08,468 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:54:08,469 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:54:08,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 06:54:08,471 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 06:54:08,472 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:54:08,473 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:54:08,473 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 06:54:08,506 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 06:54:08,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 265 places, 308 transitions, 634 flow [2023-09-01 06:54:08,588 INFO L130 PetriNetUnfolder]: 82/528 cut-off events. [2023-09-01 06:54:08,588 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 06:54:08,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 528 events. 82/528 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2488 event pairs, 0 based on Foata normal form. 0/400 useless extension candidates. Maximal degree in co-relation 320. Up to 12 conditions per place. [2023-09-01 06:54:08,593 INFO L82 GeneralOperation]: Start removeDead. Operand has 265 places, 308 transitions, 634 flow [2023-09-01 06:54:08,597 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 263 places, 306 transitions, 630 flow [2023-09-01 06:54:08,598 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:54:08,598 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 263 places, 306 transitions, 630 flow [2023-09-01 06:54:08,598 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 263 places, 306 transitions, 630 flow [2023-09-01 06:54:08,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 263 places, 306 transitions, 630 flow [2023-09-01 06:54:08,659 INFO L130 PetriNetUnfolder]: 82/526 cut-off events. [2023-09-01 06:54:08,659 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 06:54:08,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 526 events. 82/526 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2481 event pairs, 0 based on Foata normal form. 0/400 useless extension candidates. Maximal degree in co-relation 318. Up to 12 conditions per place. [2023-09-01 06:54:08,691 INFO L119 LiptonReduction]: Number of co-enabled transitions 48480 [2023-09-01 06:54:12,160 INFO L134 LiptonReduction]: Checked pairs total: 82843 [2023-09-01 06:54:12,160 INFO L136 LiptonReduction]: Total number of compositions: 248 [2023-09-01 06:54:12,163 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:54:12,164 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;@763055af, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:54:12,164 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:54:12,178 INFO L130 PetriNetUnfolder]: 35/130 cut-off events. [2023-09-01 06:54:12,179 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 06:54:12,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:54:12,179 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 06:54:12,180 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:54:12,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:54:12,180 INFO L85 PathProgramCache]: Analyzing trace with hash 2126833347, now seen corresponding path program 1 times [2023-09-01 06:54:12,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:54:12,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932540772] [2023-09-01 06:54:12,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:54:12,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:54:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:54:12,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:54:12,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:54:12,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932540772] [2023-09-01 06:54:12,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932540772] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:54:12,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:54:12,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 06:54:12,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124431173] [2023-09-01 06:54:12,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:54:12,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 06:54:12,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:54:12,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 06:54:12,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 06:54:12,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 556 [2023-09-01 06:54:12,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 129 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 260.0) internal successors, (780), 3 states have internal predecessors, (780), 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 06:54:12,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:54:12,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 556 [2023-09-01 06:54:12,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:54:16,043 INFO L130 PetriNetUnfolder]: 32034/48602 cut-off events. [2023-09-01 06:54:16,045 INFO L131 PetriNetUnfolder]: For 200/200 co-relation queries the response was YES. [2023-09-01 06:54:16,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95253 conditions, 48602 events. 32034/48602 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 1650. Compared 358229 event pairs, 28810 based on Foata normal form. 5571/37119 useless extension candidates. Maximal degree in co-relation 44703. Up to 46510 conditions per place. [2023-09-01 06:54:16,189 INFO L137 encePairwiseOnDemand]: 521/556 looper letters, 56 selfloop transitions, 2 changer transitions 33/98 dead transitions. [2023-09-01 06:54:16,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 98 transitions, 384 flow [2023-09-01 06:54:16,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 06:54:16,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 06:54:16,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 892 transitions. [2023-09-01 06:54:16,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5347721822541966 [2023-09-01 06:54:16,193 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 892 transitions. [2023-09-01 06:54:16,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 892 transitions. [2023-09-01 06:54:16,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:54:16,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 892 transitions. [2023-09-01 06:54:16,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 297.3333333333333) internal successors, (892), 3 states have internal predecessors, (892), 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 06:54:16,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 556.0) internal successors, (2224), 4 states have internal predecessors, (2224), 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 06:54:16,200 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 556.0) internal successors, (2224), 4 states have internal predecessors, (2224), 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 06:54:16,200 INFO L175 Difference]: Start difference. First operand has 93 places, 129 transitions, 276 flow. Second operand 3 states and 892 transitions. [2023-09-01 06:54:16,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 98 transitions, 384 flow [2023-09-01 06:54:16,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 98 transitions, 384 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 06:54:16,207 INFO L231 Difference]: Finished difference. Result has 96 places, 65 transitions, 152 flow [2023-09-01 06:54:16,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=556, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=96, PETRI_TRANSITIONS=65} [2023-09-01 06:54:16,208 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, 3 predicate places. [2023-09-01 06:54:16,209 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 65 transitions, 152 flow [2023-09-01 06:54:16,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 260.0) internal successors, (780), 3 states have internal predecessors, (780), 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 06:54:16,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:54:16,209 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 06:54:16,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 06:54:16,212 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:54:16,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:54:16,213 INFO L85 PathProgramCache]: Analyzing trace with hash 847515580, now seen corresponding path program 1 times [2023-09-01 06:54:16,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:54:16,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114099306] [2023-09-01 06:54:16,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:54:16,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:54:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:54:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:54:16,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:54:16,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114099306] [2023-09-01 06:54:16,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114099306] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:54:16,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280648920] [2023-09-01 06:54:16,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:54:16,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:54:16,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:54:16,257 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 06:54:16,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 06:54:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:54:16,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 06:54:16,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:54:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:54:16,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:54:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:54:16,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280648920] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:54:16,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:54:16,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 06:54:16,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782589610] [2023-09-01 06:54:16,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:54:16,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 06:54:16,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:54:16,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 06:54:16,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 06:54:16,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 556 [2023-09-01 06:54:16,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 65 transitions, 152 flow. Second operand has 7 states, 7 states have (on average 258.7142857142857) internal successors, (1811), 7 states have internal predecessors, (1811), 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 06:54:16,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:54:16,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 556 [2023-09-01 06:54:16,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:54:17,099 INFO L130 PetriNetUnfolder]: 6470/10111 cut-off events. [2023-09-01 06:54:17,100 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 06:54:17,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19895 conditions, 10111 events. 6470/10111 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 65231 event pairs, 5929 based on Foata normal form. 0/6051 useless extension candidates. Maximal degree in co-relation 19882. Up to 9679 conditions per place. [2023-09-01 06:54:17,135 INFO L137 encePairwiseOnDemand]: 553/556 looper letters, 56 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2023-09-01 06:54:17,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 68 transitions, 286 flow [2023-09-01 06:54:17,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 06:54:17,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 06:54:17,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1606 transitions. [2023-09-01 06:54:17,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4814148681055156 [2023-09-01 06:54:17,140 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1606 transitions. [2023-09-01 06:54:17,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1606 transitions. [2023-09-01 06:54:17,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:54:17,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1606 transitions. [2023-09-01 06:54:17,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 267.6666666666667) internal successors, (1606), 6 states have internal predecessors, (1606), 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 06:54:17,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 556.0) internal successors, (3892), 7 states have internal predecessors, (3892), 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 06:54:17,149 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 556.0) internal successors, (3892), 7 states have internal predecessors, (3892), 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 06:54:17,149 INFO L175 Difference]: Start difference. First operand has 96 places, 65 transitions, 152 flow. Second operand 6 states and 1606 transitions. [2023-09-01 06:54:17,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 68 transitions, 286 flow [2023-09-01 06:54:17,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 68 transitions, 280 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 06:54:17,151 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 182 flow [2023-09-01 06:54:17,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=556, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2023-09-01 06:54:17,152 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -19 predicate places. [2023-09-01 06:54:17,152 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 182 flow [2023-09-01 06:54:17,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 258.7142857142857) internal successors, (1811), 7 states have internal predecessors, (1811), 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 06:54:17,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:54:17,153 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 06:54:17,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 06:54:17,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:54:17,360 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:54:17,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:54:17,360 INFO L85 PathProgramCache]: Analyzing trace with hash 163831043, now seen corresponding path program 2 times [2023-09-01 06:54:17,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:54:17,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917161490] [2023-09-01 06:54:17,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:54:17,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:54:17,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:54:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:54:17,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:54:17,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917161490] [2023-09-01 06:54:17,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917161490] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:54:17,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045606963] [2023-09-01 06:54:17,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 06:54:17,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:54:17,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:54:17,445 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 06:54:17,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 06:54:17,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 06:54:17,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 06:54:17,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 06:54:17,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:54:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:54:17,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:54:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:54:17,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045606963] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:54:17,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:54:17,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 06:54:17,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657073795] [2023-09-01 06:54:17,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:54:17,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 06:54:17,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:54:17,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 06:54:17,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 06:54:17,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 556 [2023-09-01 06:54:17,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 182 flow. Second operand has 13 states, 13 states have (on average 258.38461538461536) internal successors, (3359), 13 states have internal predecessors, (3359), 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 06:54:17,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:54:17,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 556 [2023-09-01 06:54:17,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:54:18,288 INFO L130 PetriNetUnfolder]: 6470/10117 cut-off events. [2023-09-01 06:54:18,288 INFO L131 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2023-09-01 06:54:18,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19925 conditions, 10117 events. 6470/10117 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 65261 event pairs, 5929 based on Foata normal form. 6/6064 useless extension candidates. Maximal degree in co-relation 19866. Up to 9679 conditions per place. [2023-09-01 06:54:18,320 INFO L137 encePairwiseOnDemand]: 553/556 looper letters, 56 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2023-09-01 06:54:18,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 74 transitions, 352 flow [2023-09-01 06:54:18,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 06:54:18,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 06:54:18,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3157 transitions. [2023-09-01 06:54:18,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4731714628297362 [2023-09-01 06:54:18,329 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3157 transitions. [2023-09-01 06:54:18,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3157 transitions. [2023-09-01 06:54:18,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:54:18,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3157 transitions. [2023-09-01 06:54:18,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 263.0833333333333) internal successors, (3157), 12 states have internal predecessors, (3157), 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 06:54:18,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 556.0) internal successors, (7228), 13 states have internal predecessors, (7228), 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 06:54:18,347 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 556.0) internal successors, (7228), 13 states have internal predecessors, (7228), 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 06:54:18,347 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 182 flow. Second operand 12 states and 3157 transitions. [2023-09-01 06:54:18,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 74 transitions, 352 flow [2023-09-01 06:54:18,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 74 transitions, 338 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 06:54:18,350 INFO L231 Difference]: Finished difference. Result has 90 places, 74 transitions, 252 flow [2023-09-01 06:54:18,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=556, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=252, PETRI_PLACES=90, PETRI_TRANSITIONS=74} [2023-09-01 06:54:18,351 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -3 predicate places. [2023-09-01 06:54:18,351 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 74 transitions, 252 flow [2023-09-01 06:54:18,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 258.38461538461536) internal successors, (3359), 13 states have internal predecessors, (3359), 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 06:54:18,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:54:18,353 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 06:54:18,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 06:54:18,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:54:18,561 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:54:18,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:54:18,562 INFO L85 PathProgramCache]: Analyzing trace with hash 146911843, now seen corresponding path program 3 times [2023-09-01 06:54:18,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:54:18,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415708534] [2023-09-01 06:54:18,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:54:18,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:54:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:54:18,599 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:54:18,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:54:18,622 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:54:18,623 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:54:18,624 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:54:18,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 06:54:18,624 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 06:54:18,625 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:54:18,625 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:54:18,625 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 06:54:18,669 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 06:54:18,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 334 places, 390 transitions, 810 flow [2023-09-01 06:54:18,792 INFO L130 PetriNetUnfolder]: 120/777 cut-off events. [2023-09-01 06:54:18,793 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 06:54:18,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 805 conditions, 777 events. 120/777 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3933 event pairs, 1 based on Foata normal form. 0/589 useless extension candidates. Maximal degree in co-relation 536. Up to 16 conditions per place. [2023-09-01 06:54:18,806 INFO L82 GeneralOperation]: Start removeDead. Operand has 334 places, 390 transitions, 810 flow [2023-09-01 06:54:18,814 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 332 places, 388 transitions, 806 flow [2023-09-01 06:54:18,814 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:54:18,814 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 332 places, 388 transitions, 806 flow [2023-09-01 06:54:18,815 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 332 places, 388 transitions, 806 flow [2023-09-01 06:54:18,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 388 transitions, 806 flow [2023-09-01 06:54:18,929 INFO L130 PetriNetUnfolder]: 120/775 cut-off events. [2023-09-01 06:54:18,929 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 06:54:18,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 803 conditions, 775 events. 120/775 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3921 event pairs, 1 based on Foata normal form. 0/589 useless extension candidates. Maximal degree in co-relation 534. Up to 16 conditions per place. [2023-09-01 06:54:18,983 INFO L119 LiptonReduction]: Number of co-enabled transitions 92640 [2023-09-01 06:54:23,045 INFO L134 LiptonReduction]: Checked pairs total: 162483 [2023-09-01 06:54:23,045 INFO L136 LiptonReduction]: Total number of compositions: 314 [2023-09-01 06:54:23,047 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:54:23,047 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;@763055af, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:54:23,047 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:54:23,064 INFO L130 PetriNetUnfolder]: 62/218 cut-off events. [2023-09-01 06:54:23,064 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 06:54:23,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:54:23,065 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 06:54:23,065 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:54:23,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:54:23,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1034005155, now seen corresponding path program 1 times [2023-09-01 06:54:23,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:54:23,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94857369] [2023-09-01 06:54:23,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:54:23,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:54:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:54:23,099 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:54:23,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:54:23,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94857369] [2023-09-01 06:54:23,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94857369] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:54:23,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:54:23,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 06:54:23,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515303266] [2023-09-01 06:54:23,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:54:23,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 06:54:23,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:54:23,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 06:54:23,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 06:54:23,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 704 [2023-09-01 06:54:23,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 167 transitions, 364 flow. Second operand has 3 states, 3 states have (on average 327.3333333333333) internal successors, (982), 3 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:54:23,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:54:23,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 704 [2023-09-01 06:54:23,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:55:44,730 INFO L130 PetriNetUnfolder]: 935015/1282347 cut-off events. [2023-09-01 06:55:44,731 INFO L131 PetriNetUnfolder]: For 7486/7486 co-relation queries the response was YES. [2023-09-01 06:55:47,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2500166 conditions, 1282347 events. 935015/1282347 cut-off events. For 7486/7486 co-relation queries the response was YES. Maximal size of possible extension queue 35048. Compared 11097047 event pairs, 852349 based on Foata normal form. 181788/1032152 useless extension candidates. Maximal degree in co-relation 357354. Up to 1213929 conditions per place. [2023-09-01 06:55:49,928 INFO L137 encePairwiseOnDemand]: 659/704 looper letters, 76 selfloop transitions, 2 changer transitions 34/126 dead transitions. [2023-09-01 06:55:49,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 126 transitions, 494 flow [2023-09-01 06:55:49,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 06:55:49,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 06:55:49,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1124 transitions. [2023-09-01 06:55:49,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5321969696969697 [2023-09-01 06:55:49,937 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1124 transitions. [2023-09-01 06:55:49,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1124 transitions. [2023-09-01 06:55:49,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:55:49,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1124 transitions. [2023-09-01 06:55:49,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 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 06:55:49,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 704.0) internal successors, (2816), 4 states have internal predecessors, (2816), 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 06:55:49,984 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 704.0) internal successors, (2816), 4 states have internal predecessors, (2816), 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 06:55:49,985 INFO L175 Difference]: Start difference. First operand has 120 places, 167 transitions, 364 flow. Second operand 3 states and 1124 transitions. [2023-09-01 06:55:49,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 126 transitions, 494 flow [2023-09-01 06:55:49,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 126 transitions, 494 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 06:55:50,016 INFO L231 Difference]: Finished difference. Result has 123 places, 92 transitions, 215 flow [2023-09-01 06:55:50,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=704, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=215, PETRI_PLACES=123, PETRI_TRANSITIONS=92} [2023-09-01 06:55:50,019 INFO L281 CegarLoopForPetriNet]: 120 programPoint places, 3 predicate places. [2023-09-01 06:55:50,019 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 92 transitions, 215 flow [2023-09-01 06:55:50,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 327.3333333333333) internal successors, (982), 3 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:55:50,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:55:50,020 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:55:50,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 06:55:50,020 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:55:50,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:55:50,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1835490453, now seen corresponding path program 1 times [2023-09-01 06:55:50,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:55:50,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603944590] [2023-09-01 06:55:50,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:55:50,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:55:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:55:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:55:50,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:55:50,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603944590] [2023-09-01 06:55:50,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603944590] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:55:50,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476190855] [2023-09-01 06:55:50,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:55:50,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:55:50,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:55:50,072 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 06:55:50,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 06:55:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:55:50,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 06:55:50,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:55:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:55:50,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:55:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:55:50,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476190855] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:55:50,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:55:50,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 06:55:50,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053471382] [2023-09-01 06:55:50,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:55:50,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 06:55:50,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:55:50,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 06:55:50,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 06:55:50,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 704 [2023-09-01 06:55:50,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 92 transitions, 215 flow. Second operand has 7 states, 7 states have (on average 325.85714285714283) internal successors, (2281), 7 states have internal predecessors, (2281), 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 06:55:50,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:55:50,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 704 [2023-09-01 06:55:50,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:56:10,901 INFO L130 PetriNetUnfolder]: 193192/268490 cut-off events. [2023-09-01 06:56:10,902 INFO L131 PetriNetUnfolder]: For 3235/3235 co-relation queries the response was YES. [2023-09-01 06:56:11,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 524693 conditions, 268490 events. 193192/268490 cut-off events. For 3235/3235 co-relation queries the response was YES. Maximal size of possible extension queue 8742. Compared 2108942 event pairs, 177975 based on Foata normal form. 0/168333 useless extension candidates. Maximal degree in co-relation 524679. Up to 253887 conditions per place. [2023-09-01 06:56:12,351 INFO L137 encePairwiseOnDemand]: 701/704 looper letters, 76 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2023-09-01 06:56:12,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 95 transitions, 389 flow [2023-09-01 06:56:12,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 06:56:12,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 06:56:12,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2028 transitions. [2023-09-01 06:56:12,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2023-09-01 06:56:12,367 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2028 transitions. [2023-09-01 06:56:12,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2028 transitions. [2023-09-01 06:56:12,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:56:12,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2028 transitions. [2023-09-01 06:56:12,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 338.0) internal successors, (2028), 6 states have internal predecessors, (2028), 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 06:56:12,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 704.0) internal successors, (4928), 7 states have internal predecessors, (4928), 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 06:56:12,399 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 704.0) internal successors, (4928), 7 states have internal predecessors, (4928), 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 06:56:12,399 INFO L175 Difference]: Start difference. First operand has 123 places, 92 transitions, 215 flow. Second operand 6 states and 2028 transitions. [2023-09-01 06:56:12,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 95 transitions, 389 flow [2023-09-01 06:56:12,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 95 transitions, 379 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 06:56:12,407 INFO L231 Difference]: Finished difference. Result has 101 places, 95 transitions, 241 flow [2023-09-01 06:56:12,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=704, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=101, PETRI_TRANSITIONS=95} [2023-09-01 06:56:12,426 INFO L281 CegarLoopForPetriNet]: 120 programPoint places, -19 predicate places. [2023-09-01 06:56:12,427 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 95 transitions, 241 flow [2023-09-01 06:56:12,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 325.85714285714283) internal successors, (2281), 7 states have internal predecessors, (2281), 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 06:56:12,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:56:12,428 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 06:56:12,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 06:56:12,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-09-01 06:56:12,633 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:56:12,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:56:12,633 INFO L85 PathProgramCache]: Analyzing trace with hash 629696733, now seen corresponding path program 2 times [2023-09-01 06:56:12,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:56:12,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203193431] [2023-09-01 06:56:12,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:56:12,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:56:12,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:56:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:56:12,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:56:12,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203193431] [2023-09-01 06:56:12,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203193431] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:56:12,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441085920] [2023-09-01 06:56:12,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 06:56:12,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:56:12,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:56:12,755 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 06:56:12,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 06:56:12,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 06:56:12,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 06:56:12,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 06:56:12,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:56:12,911 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:56:12,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:56:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:56:12,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441085920] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:56:12,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:56:12,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 06:56:12,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368745978] [2023-09-01 06:56:12,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:56:12,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 06:56:12,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:56:12,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 06:56:12,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 06:56:13,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 704 [2023-09-01 06:56:13,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 95 transitions, 241 flow. Second operand has 13 states, 13 states have (on average 325.46153846153845) internal successors, (4231), 13 states have internal predecessors, (4231), 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 06:56:13,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:56:13,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 704 [2023-09-01 06:56:13,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:56:29,932 INFO L130 PetriNetUnfolder]: 193192/268496 cut-off events. [2023-09-01 06:56:29,932 INFO L131 PetriNetUnfolder]: For 1518/1518 co-relation queries the response was YES. [2023-09-01 06:56:30,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 524050 conditions, 268496 events. 193192/268496 cut-off events. For 1518/1518 co-relation queries the response was YES. Maximal size of possible extension queue 8744. Compared 2109205 event pairs, 177975 based on Foata normal form. 6/168346 useless extension candidates. Maximal degree in co-relation 523990. Up to 253887 conditions per place. [2023-09-01 06:56:31,116 INFO L137 encePairwiseOnDemand]: 701/704 looper letters, 76 selfloop transitions, 11 changer transitions 0/101 dead transitions. [2023-09-01 06:56:31,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 101 transitions, 451 flow [2023-09-01 06:56:31,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 06:56:31,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 06:56:31,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3981 transitions. [2023-09-01 06:56:31,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47123579545454547 [2023-09-01 06:56:31,125 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3981 transitions. [2023-09-01 06:56:31,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3981 transitions. [2023-09-01 06:56:31,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:56:31,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3981 transitions. [2023-09-01 06:56:31,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 331.75) internal successors, (3981), 12 states have internal predecessors, (3981), 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 06:56:31,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 704.0) internal successors, (9152), 13 states have internal predecessors, (9152), 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 06:56:31,145 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 704.0) internal successors, (9152), 13 states have internal predecessors, (9152), 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 06:56:31,145 INFO L175 Difference]: Start difference. First operand has 101 places, 95 transitions, 241 flow. Second operand 12 states and 3981 transitions. [2023-09-01 06:56:31,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 101 transitions, 451 flow [2023-09-01 06:56:31,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 101 transitions, 437 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 06:56:31,148 INFO L231 Difference]: Finished difference. Result has 117 places, 101 transitions, 311 flow [2023-09-01 06:56:31,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=704, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=311, PETRI_PLACES=117, PETRI_TRANSITIONS=101} [2023-09-01 06:56:31,150 INFO L281 CegarLoopForPetriNet]: 120 programPoint places, -3 predicate places. [2023-09-01 06:56:31,150 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 101 transitions, 311 flow [2023-09-01 06:56:31,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 325.46153846153845) internal successors, (4231), 13 states have internal predecessors, (4231), 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 06:56:31,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:56:31,151 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 06:56:31,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 06:56:31,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:56:31,358 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:56:31,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:56:31,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1875426845, now seen corresponding path program 3 times [2023-09-01 06:56:31,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:56:31,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724400890] [2023-09-01 06:56:31,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:56:31,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:56:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:56:31,380 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:56:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:56:31,415 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:56:31,416 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:56:31,416 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:56:31,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 06:56:31,416 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 06:56:31,418 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:56:31,418 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:56:31,418 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 06:56:31,661 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 06:56:31,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 403 places, 472 transitions, 988 flow [2023-09-01 06:56:31,804 INFO L130 PetriNetUnfolder]: 170/1106 cut-off events. [2023-09-01 06:56:31,804 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 06:56:31,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1161 conditions, 1106 events. 170/1106 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 5925 event pairs, 6 based on Foata normal form. 0/842 useless extension candidates. Maximal degree in co-relation 797. Up to 32 conditions per place. [2023-09-01 06:56:31,821 INFO L82 GeneralOperation]: Start removeDead. Operand has 403 places, 472 transitions, 988 flow [2023-09-01 06:56:31,830 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 401 places, 470 transitions, 984 flow [2023-09-01 06:56:31,830 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:56:31,830 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 401 places, 470 transitions, 984 flow [2023-09-01 06:56:31,831 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 401 places, 470 transitions, 984 flow [2023-09-01 06:56:31,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 401 places, 470 transitions, 984 flow [2023-09-01 06:56:31,966 INFO L130 PetriNetUnfolder]: 170/1104 cut-off events. [2023-09-01 06:56:31,967 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 06:56:31,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1159 conditions, 1104 events. 170/1104 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 5915 event pairs, 6 based on Foata normal form. 0/842 useless extension candidates. Maximal degree in co-relation 795. Up to 32 conditions per place. [2023-09-01 06:56:32,046 INFO L119 LiptonReduction]: Number of co-enabled transitions 150080 [2023-09-01 06:56:36,236 INFO L134 LiptonReduction]: Checked pairs total: 239808 [2023-09-01 06:56:36,237 INFO L136 LiptonReduction]: Total number of compositions: 372 [2023-09-01 06:56:36,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:56:36,239 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;@763055af, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:56:36,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:56:36,262 INFO L130 PetriNetUnfolder]: 84/308 cut-off events. [2023-09-01 06:56:36,262 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 06:56:36,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:56:36,263 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:56:36,263 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:56:36,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:56:36,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1380412530, now seen corresponding path program 1 times [2023-09-01 06:56:36,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:56:36,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837464780] [2023-09-01 06:56:36,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:56:36,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:56:36,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:56:36,288 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-09-01 06:56:36,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:56:36,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837464780] [2023-09-01 06:56:36,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837464780] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:56:36,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:56:36,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 06:56:36,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822411806] [2023-09-01 06:56:36,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:56:36,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 06:56:36,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:56:36,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 06:56:36,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 06:56:36,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 392 out of 844 [2023-09-01 06:56:36,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 203 transitions, 450 flow. Second operand has 3 states, 3 states have (on average 394.6666666666667) internal successors, (1184), 3 states have internal predecessors, (1184), 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 06:56:36,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:56:36,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 392 of 844 [2023-09-01 06:56:36,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand