./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 --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 13:25:22,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 13:25:22,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 13:25:22,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 13:25:22,477 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 13:25:22,480 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 13:25:22,482 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 13:25:22,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 13:25:22,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 13:25:22,493 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 13:25:22,494 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 13:25:22,496 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 13:25:22,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 13:25:22,499 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 13:25:22,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 13:25:22,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 13:25:22,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 13:25:22,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 13:25:22,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 13:25:22,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 13:25:22,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 13:25:22,527 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 13:25:22,528 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 13:25:22,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 13:25:22,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 13:25:22,533 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 13:25:22,533 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 13:25:22,534 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 13:25:22,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 13:25:22,536 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 13:25:22,536 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 13:25:22,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 13:25:22,539 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 13:25:22,540 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 13:25:22,541 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 13:25:22,541 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 13:25:22,541 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 13:25:22,542 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 13:25:22,542 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 13:25:22,543 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 13:25:22,543 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 13:25:22,545 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 13:25:22,582 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 13:25:22,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 13:25:22,584 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 13:25:22,584 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 13:25:22,585 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 13:25:22,585 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 13:25:22,587 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 13:25:22,587 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 13:25:22,587 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 13:25:22,588 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 13:25:22,592 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 13:25:22,593 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 13:25:22,593 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 13:25:22,593 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 13:25:22,593 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 13:25:22,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 13:25:22,594 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 13:25:22,594 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 13:25:22,594 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 13:25:22,594 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 13:25:22,594 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 13:25:22,595 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 13:25:22,595 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 13:25:22,595 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 13:25:22,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:25:22,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 13:25:22,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 13:25:22,596 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 13:25:22,596 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 13:25:22,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 13:25:22,596 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 13:25:22,597 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 13:25:22,597 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 13:25:22,597 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 13:25:22,597 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 13:25:22,597 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 13:25:22,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 13:25:22,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 13:25:22,904 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 13:25:22,905 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 13:25:22,905 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 13:25:22,906 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2023-09-01 13:25:24,060 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 13:25:24,246 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 13:25:24,246 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2023-09-01 13:25:24,251 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f3868c95/36d589ebd590436e85684323c2da2c2f/FLAG7e98678a7 [2023-09-01 13:25:24,261 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f3868c95/36d589ebd590436e85684323c2da2c2f [2023-09-01 13:25:24,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 13:25:24,265 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 13:25:24,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 13:25:24,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 13:25:24,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 13:25:24,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:25:24" (1/1) ... [2023-09-01 13:25:24,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dd55950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:25:24, skipping insertion in model container [2023-09-01 13:25:24,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:25:24" (1/1) ... [2023-09-01 13:25:24,274 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 13:25:24,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 13:25:24,431 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2023-09-01 13:25:24,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:25:24,446 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 13:25:24,473 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2023-09-01 13:25:24,480 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:25:24,487 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:25:24,487 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:25:24,492 INFO L208 MainTranslator]: Completed translation [2023-09-01 13:25:24,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:25:24 WrapperNode [2023-09-01 13:25:24,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 13:25:24,494 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 13:25:24,494 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 13:25:24,494 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 13:25:24,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:25:24" (1/1) ... [2023-09-01 13:25:24,510 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:25:24" (1/1) ... [2023-09-01 13:25:24,534 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 78 [2023-09-01 13:25:24,534 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 13:25:24,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 13:25:24,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 13:25:24,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 13:25:24,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:25:24" (1/1) ... [2023-09-01 13:25:24,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:25:24" (1/1) ... [2023-09-01 13:25:24,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:25:24" (1/1) ... [2023-09-01 13:25:24,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:25:24" (1/1) ... [2023-09-01 13:25:24,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:25:24" (1/1) ... [2023-09-01 13:25:24,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:25:24" (1/1) ... [2023-09-01 13:25:24,571 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:25:24" (1/1) ... [2023-09-01 13:25:24,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:25:24" (1/1) ... [2023-09-01 13:25:24,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 13:25:24,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 13:25:24,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 13:25:24,580 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 13:25:24,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:25:24" (1/1) ... [2023-09-01 13:25:24,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:25:24,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:25:24,608 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 13:25:24,629 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 13:25:24,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 13:25:24,652 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 13:25:24,652 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 13:25:24,653 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 13:25:24,653 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 13:25:24,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 13:25:24,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 13:25:24,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 13:25:24,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 13:25:24,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 13:25:24,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 13:25:24,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 13:25:24,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 13:25:24,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 13:25:24,655 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 13:25:24,760 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 13:25:24,761 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 13:25:25,012 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 13:25:25,067 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 13:25:25,068 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 13:25:25,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:25:25 BoogieIcfgContainer [2023-09-01 13:25:25,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 13:25:25,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 13:25:25,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 13:25:25,076 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 13:25:25,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:25:24" (1/3) ... [2023-09-01 13:25:25,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@261d96cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:25:25, skipping insertion in model container [2023-09-01 13:25:25,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:25:24" (2/3) ... [2023-09-01 13:25:25,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@261d96cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:25:25, skipping insertion in model container [2023-09-01 13:25:25,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:25:25" (3/3) ... [2023-09-01 13:25:25,078 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2023-09-01 13:25:25,086 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 13:25:25,093 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 13:25:25,094 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 13:25:25,094 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 13:25:25,167 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 13:25:25,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2023-09-01 13:25:25,280 INFO L130 PetriNetUnfolder]: 6/82 cut-off events. [2023-09-01 13:25:25,280 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 13:25:25,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-09-01 13:25:25,287 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2023-09-01 13:25:25,293 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 74 transitions, 160 flow [2023-09-01 13:25:25,297 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 13:25:25,310 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 74 transitions, 160 flow [2023-09-01 13:25:25,314 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 74 transitions, 160 flow [2023-09-01 13:25:25,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 74 transitions, 160 flow [2023-09-01 13:25:25,348 INFO L130 PetriNetUnfolder]: 6/74 cut-off events. [2023-09-01 13:25:25,349 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 13:25:25,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 74 events. 6/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-09-01 13:25:25,351 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-09-01 13:25:27,533 INFO L134 LiptonReduction]: Checked pairs total: 559 [2023-09-01 13:25:27,534 INFO L136 LiptonReduction]: Total number of compositions: 68 [2023-09-01 13:25:27,545 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 13:25:27,550 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;@2ff7061d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 13:25:27,551 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 13:25:27,560 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-09-01 13:25:27,560 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 13:25:27,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:27,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:27,561 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:25:27,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:27,565 INFO L85 PathProgramCache]: Analyzing trace with hash -463799749, now seen corresponding path program 1 times [2023-09-01 13:25:27,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:27,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204738406] [2023-09-01 13:25:27,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:27,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:28,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:28,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204738406] [2023-09-01 13:25:28,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204738406] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:25:28,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:25:28,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 13:25:28,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752649945] [2023-09-01 13:25:28,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:25:28,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 13:25:28,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:28,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 13:25:28,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-09-01 13:25:28,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 152 [2023-09-01 13:25:28,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 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 13:25:28,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:28,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 152 [2023-09-01 13:25:28,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:28,531 INFO L130 PetriNetUnfolder]: 62/126 cut-off events. [2023-09-01 13:25:28,531 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-09-01 13:25:28,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 126 events. 62/126 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 353 event pairs, 14 based on Foata normal form. 1/103 useless extension candidates. Maximal degree in co-relation 200. Up to 63 conditions per place. [2023-09-01 13:25:28,533 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 32 selfloop transitions, 8 changer transitions 5/45 dead transitions. [2023-09-01 13:25:28,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 45 transitions, 213 flow [2023-09-01 13:25:28,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:25:28,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:25:28,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 488 transitions. [2023-09-01 13:25:28,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45864661654135336 [2023-09-01 13:25:28,560 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 488 transitions. [2023-09-01 13:25:28,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 488 transitions. [2023-09-01 13:25:28,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:28,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 488 transitions. [2023-09-01 13:25:28,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.71428571428571) internal successors, (488), 7 states have internal predecessors, (488), 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 13:25:28,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 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 13:25:28,573 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 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 13:25:28,574 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 7 states and 488 transitions. [2023-09-01 13:25:28,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 45 transitions, 213 flow [2023-09-01 13:25:28,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 45 transitions, 191 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 13:25:28,578 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 89 flow [2023-09-01 13:25:28,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=89, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-09-01 13:25:28,582 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-09-01 13:25:28,582 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 89 flow [2023-09-01 13:25:28,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 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 13:25:28,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:28,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:28,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 13:25:28,584 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:25:28,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:28,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1560515861, now seen corresponding path program 2 times [2023-09-01 13:25:28,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:28,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421157800] [2023-09-01 13:25:28,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:28,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:28,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:28,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:28,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:28,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421157800] [2023-09-01 13:25:28,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421157800] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:25:28,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:25:28,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 13:25:28,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932828660] [2023-09-01 13:25:28,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:25:28,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 13:25:28,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:28,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 13:25:28,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-09-01 13:25:28,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 152 [2023-09-01 13:25:28,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 89 flow. Second operand has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 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 13:25:28,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:28,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 152 [2023-09-01 13:25:28,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:29,098 INFO L130 PetriNetUnfolder]: 63/131 cut-off events. [2023-09-01 13:25:29,099 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2023-09-01 13:25:29,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 131 events. 63/131 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 408 event pairs, 10 based on Foata normal form. 1/126 useless extension candidates. Maximal degree in co-relation 377. Up to 63 conditions per place. [2023-09-01 13:25:29,100 INFO L137 encePairwiseOnDemand]: 145/152 looper letters, 29 selfloop transitions, 8 changer transitions 11/48 dead transitions. [2023-09-01 13:25:29,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 48 transitions, 269 flow [2023-09-01 13:25:29,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:25:29,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:25:29,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 486 transitions. [2023-09-01 13:25:29,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567669172932331 [2023-09-01 13:25:29,103 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 486 transitions. [2023-09-01 13:25:29,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 486 transitions. [2023-09-01 13:25:29,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:29,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 486 transitions. [2023-09-01 13:25:29,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.42857142857143) internal successors, (486), 7 states have internal predecessors, (486), 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 13:25:29,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 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 13:25:29,108 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 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 13:25:29,108 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 89 flow. Second operand 7 states and 486 transitions. [2023-09-01 13:25:29,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 48 transitions, 269 flow [2023-09-01 13:25:29,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 48 transitions, 263 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 13:25:29,111 INFO L231 Difference]: Finished difference. Result has 35 places, 23 transitions, 121 flow [2023-09-01 13:25:29,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=121, PETRI_PLACES=35, PETRI_TRANSITIONS=23} [2023-09-01 13:25:29,112 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 15 predicate places. [2023-09-01 13:25:29,112 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 23 transitions, 121 flow [2023-09-01 13:25:29,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 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 13:25:29,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:29,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:29,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 13:25:29,113 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:25:29,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:29,114 INFO L85 PathProgramCache]: Analyzing trace with hash -2054408487, now seen corresponding path program 3 times [2023-09-01 13:25:29,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:29,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316299088] [2023-09-01 13:25:29,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:29,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:29,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:29,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:29,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316299088] [2023-09-01 13:25:29,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316299088] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:25:29,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:25:29,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 13:25:29,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024972377] [2023-09-01 13:25:29,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:25:29,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 13:25:29,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:29,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 13:25:29,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-09-01 13:25:29,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 152 [2023-09-01 13:25:29,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 23 transitions, 121 flow. Second operand has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 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 13:25:29,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:29,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 152 [2023-09-01 13:25:29,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:29,561 INFO L130 PetriNetUnfolder]: 66/144 cut-off events. [2023-09-01 13:25:29,562 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2023-09-01 13:25:29,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 144 events. 66/144 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 462 event pairs, 18 based on Foata normal form. 1/139 useless extension candidates. Maximal degree in co-relation 494. Up to 67 conditions per place. [2023-09-01 13:25:29,563 INFO L137 encePairwiseOnDemand]: 145/152 looper letters, 33 selfloop transitions, 11 changer transitions 8/52 dead transitions. [2023-09-01 13:25:29,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 52 transitions, 337 flow [2023-09-01 13:25:29,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:25:29,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:25:29,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 491 transitions. [2023-09-01 13:25:29,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46146616541353386 [2023-09-01 13:25:29,570 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 491 transitions. [2023-09-01 13:25:29,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 491 transitions. [2023-09-01 13:25:29,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:29,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 491 transitions. [2023-09-01 13:25:29,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.14285714285714) internal successors, (491), 7 states have internal predecessors, (491), 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 13:25:29,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 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 13:25:29,574 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 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 13:25:29,574 INFO L175 Difference]: Start difference. First operand has 35 places, 23 transitions, 121 flow. Second operand 7 states and 491 transitions. [2023-09-01 13:25:29,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 52 transitions, 337 flow [2023-09-01 13:25:29,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 52 transitions, 304 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-09-01 13:25:29,580 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 165 flow [2023-09-01 13:25:29,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-09-01 13:25:29,582 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 19 predicate places. [2023-09-01 13:25:29,584 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 165 flow [2023-09-01 13:25:29,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 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 13:25:29,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:29,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:29,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 13:25:29,586 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:25:29,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:29,587 INFO L85 PathProgramCache]: Analyzing trace with hash 485360883, now seen corresponding path program 4 times [2023-09-01 13:25:29,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:29,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769844627] [2023-09-01 13:25:29,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:29,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:29,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:29,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769844627] [2023-09-01 13:25:29,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769844627] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:25:29,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:25:29,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 13:25:29,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194037884] [2023-09-01 13:25:29,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:25:29,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 13:25:29,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:29,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 13:25:29,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-09-01 13:25:29,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 152 [2023-09-01 13:25:29,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 165 flow. Second operand has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 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 13:25:29,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:29,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 152 [2023-09-01 13:25:29,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:30,010 INFO L130 PetriNetUnfolder]: 64/142 cut-off events. [2023-09-01 13:25:30,010 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2023-09-01 13:25:30,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529 conditions, 142 events. 64/142 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 464 event pairs, 12 based on Foata normal form. 1/137 useless extension candidates. Maximal degree in co-relation 506. Up to 67 conditions per place. [2023-09-01 13:25:30,012 INFO L137 encePairwiseOnDemand]: 145/152 looper letters, 36 selfloop transitions, 12 changer transitions 5/53 dead transitions. [2023-09-01 13:25:30,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 367 flow [2023-09-01 13:25:30,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:25:30,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:25:30,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 490 transitions. [2023-09-01 13:25:30,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4605263157894737 [2023-09-01 13:25:30,014 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 490 transitions. [2023-09-01 13:25:30,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 490 transitions. [2023-09-01 13:25:30,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:30,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 490 transitions. [2023-09-01 13:25:30,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 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 13:25:30,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 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 13:25:30,018 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 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 13:25:30,018 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 165 flow. Second operand 7 states and 490 transitions. [2023-09-01 13:25:30,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 367 flow [2023-09-01 13:25:30,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 53 transitions, 350 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-09-01 13:25:30,021 INFO L231 Difference]: Finished difference. Result has 45 places, 29 transitions, 216 flow [2023-09-01 13:25:30,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=216, PETRI_PLACES=45, PETRI_TRANSITIONS=29} [2023-09-01 13:25:30,022 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 25 predicate places. [2023-09-01 13:25:30,022 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 29 transitions, 216 flow [2023-09-01 13:25:30,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 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 13:25:30,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:30,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:30,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 13:25:30,023 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:25:30,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:30,024 INFO L85 PathProgramCache]: Analyzing trace with hash -2091229915, now seen corresponding path program 5 times [2023-09-01 13:25:30,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:30,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833945069] [2023-09-01 13:25:30,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:30,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:30,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:30,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833945069] [2023-09-01 13:25:30,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833945069] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:25:30,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:25:30,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 13:25:30,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897055086] [2023-09-01 13:25:30,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:25:30,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 13:25:30,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:30,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 13:25:30,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-09-01 13:25:30,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 152 [2023-09-01 13:25:30,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 29 transitions, 216 flow. Second operand has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 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 13:25:30,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:30,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 152 [2023-09-01 13:25:30,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:30,466 INFO L130 PetriNetUnfolder]: 63/135 cut-off events. [2023-09-01 13:25:30,467 INFO L131 PetriNetUnfolder]: For 328/328 co-relation queries the response was YES. [2023-09-01 13:25:30,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 559 conditions, 135 events. 63/135 cut-off events. For 328/328 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 421 event pairs, 12 based on Foata normal form. 1/130 useless extension candidates. Maximal degree in co-relation 536. Up to 67 conditions per place. [2023-09-01 13:25:30,469 INFO L137 encePairwiseOnDemand]: 145/152 looper letters, 29 selfloop transitions, 11 changer transitions 9/49 dead transitions. [2023-09-01 13:25:30,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 383 flow [2023-09-01 13:25:30,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:25:30,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:25:30,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 485 transitions. [2023-09-01 13:25:30,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558270676691729 [2023-09-01 13:25:30,477 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 485 transitions. [2023-09-01 13:25:30,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 485 transitions. [2023-09-01 13:25:30,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:30,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 485 transitions. [2023-09-01 13:25:30,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.28571428571429) internal successors, (485), 7 states have internal predecessors, (485), 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 13:25:30,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 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 13:25:30,480 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 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 13:25:30,481 INFO L175 Difference]: Start difference. First operand has 45 places, 29 transitions, 216 flow. Second operand 7 states and 485 transitions. [2023-09-01 13:25:30,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 383 flow [2023-09-01 13:25:30,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 364 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-09-01 13:25:30,483 INFO L231 Difference]: Finished difference. Result has 50 places, 29 transitions, 232 flow [2023-09-01 13:25:30,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=232, PETRI_PLACES=50, PETRI_TRANSITIONS=29} [2023-09-01 13:25:30,484 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2023-09-01 13:25:30,484 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 29 transitions, 232 flow [2023-09-01 13:25:30,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 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 13:25:30,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:30,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:30,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 13:25:30,485 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:25:30,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:30,486 INFO L85 PathProgramCache]: Analyzing trace with hash -2082114117, now seen corresponding path program 6 times [2023-09-01 13:25:30,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:30,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845792874] [2023-09-01 13:25:30,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:30,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:30,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:30,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845792874] [2023-09-01 13:25:30,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845792874] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:25:30,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:25:30,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 13:25:30,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096401680] [2023-09-01 13:25:30,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:25:30,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 13:25:30,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:30,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 13:25:30,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 13:25:30,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 152 [2023-09-01 13:25:30,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 29 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 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 13:25:30,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:30,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 152 [2023-09-01 13:25:30,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:30,820 INFO L130 PetriNetUnfolder]: 59/121 cut-off events. [2023-09-01 13:25:30,821 INFO L131 PetriNetUnfolder]: For 367/367 co-relation queries the response was YES. [2023-09-01 13:25:30,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 121 events. 59/121 cut-off events. For 367/367 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 338 event pairs, 14 based on Foata normal form. 1/116 useless extension candidates. Maximal degree in co-relation 500. Up to 67 conditions per place. [2023-09-01 13:25:30,822 INFO L137 encePairwiseOnDemand]: 145/152 looper letters, 22 selfloop transitions, 11 changer transitions 12/45 dead transitions. [2023-09-01 13:25:30,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 45 transitions, 379 flow [2023-09-01 13:25:30,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:25:30,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:25:30,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 481 transitions. [2023-09-01 13:25:30,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45206766917293234 [2023-09-01 13:25:30,824 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 481 transitions. [2023-09-01 13:25:30,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 481 transitions. [2023-09-01 13:25:30,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:30,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 481 transitions. [2023-09-01 13:25:30,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.71428571428571) internal successors, (481), 7 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:30,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 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 13:25:30,828 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 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 13:25:30,828 INFO L175 Difference]: Start difference. First operand has 50 places, 29 transitions, 232 flow. Second operand 7 states and 481 transitions. [2023-09-01 13:25:30,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 45 transitions, 379 flow [2023-09-01 13:25:30,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 345 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-09-01 13:25:30,831 INFO L231 Difference]: Finished difference. Result has 49 places, 28 transitions, 214 flow [2023-09-01 13:25:30,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=214, PETRI_PLACES=49, PETRI_TRANSITIONS=28} [2023-09-01 13:25:30,832 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 29 predicate places. [2023-09-01 13:25:30,832 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 28 transitions, 214 flow [2023-09-01 13:25:30,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 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 13:25:30,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:30,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:30,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 13:25:30,833 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:25:30,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:30,834 INFO L85 PathProgramCache]: Analyzing trace with hash -2107689934, now seen corresponding path program 1 times [2023-09-01 13:25:30,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:30,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752182442] [2023-09-01 13:25:30,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:30,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:31,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:31,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752182442] [2023-09-01 13:25:31,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752182442] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:25:31,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830038680] [2023-09-01 13:25:31,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:31,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:31,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:25:31,065 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 13:25:31,079 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 13:25:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:31,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 13:25:31,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:25:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:31,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:25:31,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:31,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830038680] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:25:31,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:25:31,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-09-01 13:25:31,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180580500] [2023-09-01 13:25:31,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:25:31,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 13:25:31,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:31,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 13:25:31,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-09-01 13:25:31,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:25:31,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 28 transitions, 214 flow. Second operand has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 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 13:25:31,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:31,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:25:31,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:32,454 INFO L130 PetriNetUnfolder]: 144/300 cut-off events. [2023-09-01 13:25:32,454 INFO L131 PetriNetUnfolder]: For 262/262 co-relation queries the response was YES. [2023-09-01 13:25:32,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 947 conditions, 300 events. 144/300 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1256 event pairs, 4 based on Foata normal form. 3/269 useless extension candidates. Maximal degree in co-relation 911. Up to 89 conditions per place. [2023-09-01 13:25:32,456 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 70 selfloop transitions, 27 changer transitions 25/122 dead transitions. [2023-09-01 13:25:32,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 122 transitions, 742 flow [2023-09-01 13:25:32,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 13:25:32,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 13:25:32,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1259 transitions. [2023-09-01 13:25:32,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4359418282548476 [2023-09-01 13:25:32,460 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1259 transitions. [2023-09-01 13:25:32,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1259 transitions. [2023-09-01 13:25:32,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:32,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1259 transitions. [2023-09-01 13:25:32,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 66.26315789473684) internal successors, (1259), 19 states have internal predecessors, (1259), 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 13:25:32,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 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 13:25:32,475 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 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 13:25:32,475 INFO L175 Difference]: Start difference. First operand has 49 places, 28 transitions, 214 flow. Second operand 19 states and 1259 transitions. [2023-09-01 13:25:32,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 122 transitions, 742 flow [2023-09-01 13:25:32,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 122 transitions, 688 flow, removed 8 selfloop flow, removed 11 redundant places. [2023-09-01 13:25:32,479 INFO L231 Difference]: Finished difference. Result has 61 places, 44 transitions, 317 flow [2023-09-01 13:25:32,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=317, PETRI_PLACES=61, PETRI_TRANSITIONS=44} [2023-09-01 13:25:32,480 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 41 predicate places. [2023-09-01 13:25:32,480 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 44 transitions, 317 flow [2023-09-01 13:25:32,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 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 13:25:32,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:32,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:32,488 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 13:25:32,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:32,686 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:25:32,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:32,686 INFO L85 PathProgramCache]: Analyzing trace with hash -635034376, now seen corresponding path program 2 times [2023-09-01 13:25:32,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:32,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595799624] [2023-09-01 13:25:32,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:32,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:32,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:32,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595799624] [2023-09-01 13:25:32,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595799624] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:25:32,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266528728] [2023-09-01 13:25:32,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:25:32,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:32,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:25:32,861 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 13:25:32,893 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 13:25:32,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:25:32,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:25:32,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 13:25:32,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:25:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:33,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:25:33,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:33,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266528728] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:25:33,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:25:33,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-09-01 13:25:33,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000025432] [2023-09-01 13:25:33,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:25:33,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 13:25:33,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:33,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 13:25:33,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-09-01 13:25:33,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:25:33,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 44 transitions, 317 flow. Second operand has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 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 13:25:33,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:33,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:25:33,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:34,623 INFO L130 PetriNetUnfolder]: 189/426 cut-off events. [2023-09-01 13:25:34,623 INFO L131 PetriNetUnfolder]: For 1014/1014 co-relation queries the response was YES. [2023-09-01 13:25:34,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1672 conditions, 426 events. 189/426 cut-off events. For 1014/1014 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2146 event pairs, 10 based on Foata normal form. 4/430 useless extension candidates. Maximal degree in co-relation 1603. Up to 123 conditions per place. [2023-09-01 13:25:34,626 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 107 selfloop transitions, 53 changer transitions 20/180 dead transitions. [2023-09-01 13:25:34,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 180 transitions, 1262 flow [2023-09-01 13:25:34,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 13:25:34,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 13:25:34,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2033 transitions. [2023-09-01 13:25:34,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2023-09-01 13:25:34,631 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2033 transitions. [2023-09-01 13:25:34,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2033 transitions. [2023-09-01 13:25:34,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:34,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2033 transitions. [2023-09-01 13:25:34,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 65.58064516129032) internal successors, (2033), 31 states have internal predecessors, (2033), 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 13:25:34,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 152.0) internal successors, (4864), 32 states have internal predecessors, (4864), 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 13:25:34,643 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 152.0) internal successors, (4864), 32 states have internal predecessors, (4864), 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 13:25:34,643 INFO L175 Difference]: Start difference. First operand has 61 places, 44 transitions, 317 flow. Second operand 31 states and 2033 transitions. [2023-09-01 13:25:34,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 180 transitions, 1262 flow [2023-09-01 13:25:34,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 180 transitions, 1092 flow, removed 76 selfloop flow, removed 7 redundant places. [2023-09-01 13:25:34,650 INFO L231 Difference]: Finished difference. Result has 91 places, 71 transitions, 586 flow [2023-09-01 13:25:34,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=586, PETRI_PLACES=91, PETRI_TRANSITIONS=71} [2023-09-01 13:25:34,650 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 71 predicate places. [2023-09-01 13:25:34,650 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 71 transitions, 586 flow [2023-09-01 13:25:34,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 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 13:25:34,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:34,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:34,659 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 13:25:34,859 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,SelfDestructingSolverStorable7 [2023-09-01 13:25:34,860 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:25:34,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:34,860 INFO L85 PathProgramCache]: Analyzing trace with hash -708723856, now seen corresponding path program 3 times [2023-09-01 13:25:34,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:34,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939600257] [2023-09-01 13:25:34,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:34,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:35,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:35,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:35,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939600257] [2023-09-01 13:25:35,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939600257] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:25:35,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548171698] [2023-09-01 13:25:35,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:25:35,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:35,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:25:35,056 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 13:25:35,080 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 13:25:35,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:25:35,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:25:35,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 13:25:35,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:25:35,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:35,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:25:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:35,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548171698] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:25:35,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:25:35,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-09-01 13:25:35,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832976684] [2023-09-01 13:25:35,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:25:35,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 13:25:35,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:35,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 13:25:35,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-09-01 13:25:35,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:25:35,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 71 transitions, 586 flow. Second operand has 19 states, 19 states have (on average 62.10526315789474) internal successors, (1180), 19 states have internal predecessors, (1180), 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 13:25:35,624 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:35,624 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:25:35,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:36,581 INFO L130 PetriNetUnfolder]: 185/397 cut-off events. [2023-09-01 13:25:36,581 INFO L131 PetriNetUnfolder]: For 1780/1780 co-relation queries the response was YES. [2023-09-01 13:25:36,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1839 conditions, 397 events. 185/397 cut-off events. For 1780/1780 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1877 event pairs, 6 based on Foata normal form. 5/402 useless extension candidates. Maximal degree in co-relation 1807. Up to 119 conditions per place. [2023-09-01 13:25:36,584 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 82 selfloop transitions, 43 changer transitions 33/158 dead transitions. [2023-09-01 13:25:36,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 158 transitions, 1256 flow [2023-09-01 13:25:36,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 13:25:36,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 13:25:36,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1709 transitions. [2023-09-01 13:25:36,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4324392712550607 [2023-09-01 13:25:36,596 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1709 transitions. [2023-09-01 13:25:36,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1709 transitions. [2023-09-01 13:25:36,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:36,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1709 transitions. [2023-09-01 13:25:36,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 65.73076923076923) internal successors, (1709), 26 states have internal predecessors, (1709), 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 13:25:36,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 152.0) internal successors, (4104), 27 states have internal predecessors, (4104), 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 13:25:36,606 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 152.0) internal successors, (4104), 27 states have internal predecessors, (4104), 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 13:25:36,606 INFO L175 Difference]: Start difference. First operand has 91 places, 71 transitions, 586 flow. Second operand 26 states and 1709 transitions. [2023-09-01 13:25:36,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 158 transitions, 1256 flow [2023-09-01 13:25:36,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 158 transitions, 1137 flow, removed 39 selfloop flow, removed 8 redundant places. [2023-09-01 13:25:36,615 INFO L231 Difference]: Finished difference. Result has 109 places, 66 transitions, 564 flow [2023-09-01 13:25:36,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=564, PETRI_PLACES=109, PETRI_TRANSITIONS=66} [2023-09-01 13:25:36,616 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 89 predicate places. [2023-09-01 13:25:36,616 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 66 transitions, 564 flow [2023-09-01 13:25:36,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.10526315789474) internal successors, (1180), 19 states have internal predecessors, (1180), 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 13:25:36,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:36,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:36,627 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 13:25:36,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:36,824 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:25:36,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:36,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2082814152, now seen corresponding path program 4 times [2023-09-01 13:25:36,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:36,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849189602] [2023-09-01 13:25:36,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:36,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:36,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:36,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849189602] [2023-09-01 13:25:36,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849189602] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:25:36,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109802634] [2023-09-01 13:25:36,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:25:36,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:36,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:25:36,992 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 13:25:37,015 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 13:25:37,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:25:37,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:25:37,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 13:25:37,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:25:37,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:37,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:25:37,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:37,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109802634] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:25:37,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:25:37,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-09-01 13:25:37,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813695474] [2023-09-01 13:25:37,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:25:37,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 13:25:37,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:37,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 13:25:37,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2023-09-01 13:25:37,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:25:37,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 66 transitions, 564 flow. Second operand has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 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 13:25:37,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:37,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:25:37,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:37,872 INFO L130 PetriNetUnfolder]: 168/351 cut-off events. [2023-09-01 13:25:37,872 INFO L131 PetriNetUnfolder]: For 1783/1783 co-relation queries the response was YES. [2023-09-01 13:25:37,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1696 conditions, 351 events. 168/351 cut-off events. For 1783/1783 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1516 event pairs, 4 based on Foata normal form. 2/351 useless extension candidates. Maximal degree in co-relation 1659. Up to 155 conditions per place. [2023-09-01 13:25:37,875 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 54 selfloop transitions, 38 changer transitions 10/102 dead transitions. [2023-09-01 13:25:37,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 102 transitions, 918 flow [2023-09-01 13:25:37,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 13:25:37,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 13:25:37,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 851 transitions. [2023-09-01 13:25:37,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430668016194332 [2023-09-01 13:25:37,878 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 851 transitions. [2023-09-01 13:25:37,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 851 transitions. [2023-09-01 13:25:37,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:37,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 851 transitions. [2023-09-01 13:25:37,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 65.46153846153847) internal successors, (851), 13 states have internal predecessors, (851), 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 13:25:37,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 152.0) internal successors, (2128), 14 states have internal predecessors, (2128), 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 13:25:37,883 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 152.0) internal successors, (2128), 14 states have internal predecessors, (2128), 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 13:25:37,883 INFO L175 Difference]: Start difference. First operand has 109 places, 66 transitions, 564 flow. Second operand 13 states and 851 transitions. [2023-09-01 13:25:37,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 102 transitions, 918 flow [2023-09-01 13:25:37,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 102 transitions, 801 flow, removed 16 selfloop flow, removed 19 redundant places. [2023-09-01 13:25:37,890 INFO L231 Difference]: Finished difference. Result has 92 places, 68 transitions, 554 flow [2023-09-01 13:25:37,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=554, PETRI_PLACES=92, PETRI_TRANSITIONS=68} [2023-09-01 13:25:37,891 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2023-09-01 13:25:37,891 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 68 transitions, 554 flow [2023-09-01 13:25:37,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 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 13:25:37,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:37,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:37,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-09-01 13:25:38,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:38,096 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:25:38,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:38,097 INFO L85 PathProgramCache]: Analyzing trace with hash 992131436, now seen corresponding path program 5 times [2023-09-01 13:25:38,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:38,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778198633] [2023-09-01 13:25:38,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:38,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:38,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:38,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:38,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:38,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778198633] [2023-09-01 13:25:38,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778198633] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:25:38,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897624285] [2023-09-01 13:25:38,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:25:38,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:38,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:25:38,259 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 13:25:38,288 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 13:25:38,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:25:38,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:25:38,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 13:25:38,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:25:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:38,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:25:38,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:38,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897624285] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:25:38,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:25:38,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-09-01 13:25:38,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224062203] [2023-09-01 13:25:38,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:25:38,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 13:25:38,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:38,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 13:25:38,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-09-01 13:25:38,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:25:38,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 68 transitions, 554 flow. Second operand has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 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 13:25:38,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:38,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:25:38,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:39,044 INFO L130 PetriNetUnfolder]: 170/357 cut-off events. [2023-09-01 13:25:39,045 INFO L131 PetriNetUnfolder]: For 1289/1289 co-relation queries the response was YES. [2023-09-01 13:25:39,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1617 conditions, 357 events. 170/357 cut-off events. For 1289/1289 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1548 event pairs, 5 based on Foata normal form. 2/357 useless extension candidates. Maximal degree in co-relation 1584. Up to 195 conditions per place. [2023-09-01 13:25:39,048 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 60 selfloop transitions, 27 changer transitions 10/97 dead transitions. [2023-09-01 13:25:39,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 97 transitions, 866 flow [2023-09-01 13:25:39,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 13:25:39,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 13:25:39,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 715 transitions. [2023-09-01 13:25:39,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4276315789473684 [2023-09-01 13:25:39,050 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 715 transitions. [2023-09-01 13:25:39,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 715 transitions. [2023-09-01 13:25:39,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:39,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 715 transitions. [2023-09-01 13:25:39,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 65.0) internal successors, (715), 11 states have internal predecessors, (715), 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 13:25:39,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 152.0) internal successors, (1824), 12 states have internal predecessors, (1824), 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 13:25:39,054 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 152.0) internal successors, (1824), 12 states have internal predecessors, (1824), 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 13:25:39,054 INFO L175 Difference]: Start difference. First operand has 92 places, 68 transitions, 554 flow. Second operand 11 states and 715 transitions. [2023-09-01 13:25:39,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 97 transitions, 866 flow [2023-09-01 13:25:39,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 97 transitions, 771 flow, removed 12 selfloop flow, removed 12 redundant places. [2023-09-01 13:25:39,060 INFO L231 Difference]: Finished difference. Result has 92 places, 70 transitions, 546 flow [2023-09-01 13:25:39,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=546, PETRI_PLACES=92, PETRI_TRANSITIONS=70} [2023-09-01 13:25:39,061 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2023-09-01 13:25:39,061 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 70 transitions, 546 flow [2023-09-01 13:25:39,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 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 13:25:39,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:39,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:39,071 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 13:25:39,267 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,SelfDestructingSolverStorable10 [2023-09-01 13:25:39,267 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:25:39,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:39,267 INFO L85 PathProgramCache]: Analyzing trace with hash 209179710, now seen corresponding path program 6 times [2023-09-01 13:25:39,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:39,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713803769] [2023-09-01 13:25:39,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:39,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:39,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:39,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713803769] [2023-09-01 13:25:39,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713803769] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:25:39,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340955833] [2023-09-01 13:25:39,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:25:39,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:39,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:25:39,441 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 13:25:39,466 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 13:25:39,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 13:25:39,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:25:39,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 13:25:39,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:25:39,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:39,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:25:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:39,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340955833] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:25:39,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:25:39,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-09-01 13:25:39,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378633986] [2023-09-01 13:25:39,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:25:39,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 13:25:39,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:39,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 13:25:39,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-09-01 13:25:39,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:25:40,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 70 transitions, 546 flow. Second operand has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 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 13:25:40,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:40,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:25:40,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:40,727 INFO L130 PetriNetUnfolder]: 208/476 cut-off events. [2023-09-01 13:25:40,727 INFO L131 PetriNetUnfolder]: For 1757/1757 co-relation queries the response was YES. [2023-09-01 13:25:40,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2105 conditions, 476 events. 208/476 cut-off events. For 1757/1757 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2487 event pairs, 3 based on Foata normal form. 3/477 useless extension candidates. Maximal degree in co-relation 2063. Up to 240 conditions per place. [2023-09-01 13:25:40,731 INFO L137 encePairwiseOnDemand]: 143/152 looper letters, 94 selfloop transitions, 45 changer transitions 16/155 dead transitions. [2023-09-01 13:25:40,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 155 transitions, 1263 flow [2023-09-01 13:25:40,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 13:25:40,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 13:25:40,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1432 transitions. [2023-09-01 13:25:40,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42822966507177035 [2023-09-01 13:25:40,734 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1432 transitions. [2023-09-01 13:25:40,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1432 transitions. [2023-09-01 13:25:40,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:40,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1432 transitions. [2023-09-01 13:25:40,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.0909090909091) internal successors, (1432), 22 states have internal predecessors, (1432), 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 13:25:40,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 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 13:25:40,741 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 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 13:25:40,742 INFO L175 Difference]: Start difference. First operand has 92 places, 70 transitions, 546 flow. Second operand 22 states and 1432 transitions. [2023-09-01 13:25:40,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 155 transitions, 1263 flow [2023-09-01 13:25:40,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 155 transitions, 1212 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-09-01 13:25:40,750 INFO L231 Difference]: Finished difference. Result has 110 places, 91 transitions, 874 flow [2023-09-01 13:25:40,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=874, PETRI_PLACES=110, PETRI_TRANSITIONS=91} [2023-09-01 13:25:40,750 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 90 predicate places. [2023-09-01 13:25:40,751 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 91 transitions, 874 flow [2023-09-01 13:25:40,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 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 13:25:40,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:40,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:40,759 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 13:25:40,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:40,957 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:25:40,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:40,957 INFO L85 PathProgramCache]: Analyzing trace with hash 135490230, now seen corresponding path program 7 times [2023-09-01 13:25:40,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:40,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359001306] [2023-09-01 13:25:40,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:40,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:41,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:41,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:41,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359001306] [2023-09-01 13:25:41,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359001306] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:25:41,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234826773] [2023-09-01 13:25:41,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:25:41,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:41,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:25:41,103 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:25:41,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 13:25:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:41,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 13:25:41,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:25:41,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:41,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:25:41,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:41,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234826773] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:25:41,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:25:41,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-09-01 13:25:41,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020316019] [2023-09-01 13:25:41,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:25:41,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 13:25:41,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:41,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 13:25:41,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-09-01 13:25:41,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:25:41,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 91 transitions, 874 flow. Second operand has 19 states, 19 states have (on average 62.10526315789474) internal successors, (1180), 19 states have internal predecessors, (1180), 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 13:25:41,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:41,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:25:41,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:42,354 INFO L130 PetriNetUnfolder]: 203/442 cut-off events. [2023-09-01 13:25:42,355 INFO L131 PetriNetUnfolder]: For 2236/2236 co-relation queries the response was YES. [2023-09-01 13:25:42,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2237 conditions, 442 events. 203/442 cut-off events. For 2236/2236 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2193 event pairs, 3 based on Foata normal form. 4/444 useless extension candidates. Maximal degree in co-relation 2196. Up to 236 conditions per place. [2023-09-01 13:25:42,358 INFO L137 encePairwiseOnDemand]: 143/152 looper letters, 71 selfloop transitions, 38 changer transitions 28/137 dead transitions. [2023-09-01 13:25:42,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 137 transitions, 1289 flow [2023-09-01 13:25:42,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 13:25:42,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 13:25:42,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1233 transitions. [2023-09-01 13:25:42,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42693905817174516 [2023-09-01 13:25:42,361 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1233 transitions. [2023-09-01 13:25:42,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1233 transitions. [2023-09-01 13:25:42,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:42,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1233 transitions. [2023-09-01 13:25:42,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 64.89473684210526) internal successors, (1233), 19 states have internal predecessors, (1233), 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 13:25:42,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 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 13:25:42,378 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 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 13:25:42,378 INFO L175 Difference]: Start difference. First operand has 110 places, 91 transitions, 874 flow. Second operand 19 states and 1233 transitions. [2023-09-01 13:25:42,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 137 transitions, 1289 flow [2023-09-01 13:25:42,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 137 transitions, 1113 flow, removed 70 selfloop flow, removed 8 redundant places. [2023-09-01 13:25:42,392 INFO L231 Difference]: Finished difference. Result has 122 places, 87 transitions, 782 flow [2023-09-01 13:25:42,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=782, PETRI_PLACES=122, PETRI_TRANSITIONS=87} [2023-09-01 13:25:42,393 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 102 predicate places. [2023-09-01 13:25:42,393 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 87 transitions, 782 flow [2023-09-01 13:25:42,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.10526315789474) internal successors, (1180), 19 states have internal predecessors, (1180), 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 13:25:42,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:42,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:42,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 13:25:42,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:42,599 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:25:42,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:42,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1069243532, now seen corresponding path program 8 times [2023-09-01 13:25:42,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:42,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855842603] [2023-09-01 13:25:42,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:42,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:42,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:42,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855842603] [2023-09-01 13:25:42,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855842603] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:25:42,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173738919] [2023-09-01 13:25:42,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:25:42,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:42,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:25:42,741 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:25:42,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 13:25:42,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:25:42,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:25:42,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 13:25:42,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:25:42,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:42,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:25:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:43,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173738919] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:25:43,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:25:43,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-09-01 13:25:43,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591110932] [2023-09-01 13:25:43,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:25:43,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 13:25:43,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:43,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 13:25:43,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-09-01 13:25:43,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:25:43,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 87 transitions, 782 flow. Second operand has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 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 13:25:43,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:43,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:25:43,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:43,611 INFO L130 PetriNetUnfolder]: 188/399 cut-off events. [2023-09-01 13:25:43,611 INFO L131 PetriNetUnfolder]: For 1561/1561 co-relation queries the response was YES. [2023-09-01 13:25:43,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1937 conditions, 399 events. 188/399 cut-off events. For 1561/1561 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1837 event pairs, 9 based on Foata normal form. 2/399 useless extension candidates. Maximal degree in co-relation 1896. Up to 214 conditions per place. [2023-09-01 13:25:43,615 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 71 selfloop transitions, 33 changer transitions 11/115 dead transitions. [2023-09-01 13:25:43,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 115 transitions, 1141 flow [2023-09-01 13:25:43,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 13:25:43,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 13:25:43,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 781 transitions. [2023-09-01 13:25:43,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281798245614035 [2023-09-01 13:25:43,617 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 781 transitions. [2023-09-01 13:25:43,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 781 transitions. [2023-09-01 13:25:43,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:43,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 781 transitions. [2023-09-01 13:25:43,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 65.08333333333333) internal successors, (781), 12 states have internal predecessors, (781), 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 13:25:43,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 152.0) internal successors, (1976), 13 states have internal predecessors, (1976), 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 13:25:43,621 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 152.0) internal successors, (1976), 13 states have internal predecessors, (1976), 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 13:25:43,621 INFO L175 Difference]: Start difference. First operand has 122 places, 87 transitions, 782 flow. Second operand 12 states and 781 transitions. [2023-09-01 13:25:43,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 115 transitions, 1141 flow [2023-09-01 13:25:43,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 115 transitions, 1022 flow, removed 10 selfloop flow, removed 14 redundant places. [2023-09-01 13:25:43,637 INFO L231 Difference]: Finished difference. Result has 105 places, 87 transitions, 746 flow [2023-09-01 13:25:43,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=746, PETRI_PLACES=105, PETRI_TRANSITIONS=87} [2023-09-01 13:25:43,637 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 85 predicate places. [2023-09-01 13:25:43,637 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 87 transitions, 746 flow [2023-09-01 13:25:43,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 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 13:25:43,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:43,638 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:43,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 13:25:43,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 13:25:43,843 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:25:43,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:43,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1595484335, now seen corresponding path program 9 times [2023-09-01 13:25:43,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:43,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453129343] [2023-09-01 13:25:43,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:43,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:44,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:44,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:44,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453129343] [2023-09-01 13:25:44,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453129343] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:25:44,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039750543] [2023-09-01 13:25:44,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:25:44,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:44,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:25:44,037 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:25:44,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 13:25:44,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:25:44,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:25:44,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 13:25:44,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:25:44,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:44,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:25:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:44,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039750543] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:25:44,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:25:44,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-09-01 13:25:44,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413557464] [2023-09-01 13:25:44,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:25:44,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 13:25:44,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:44,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 13:25:44,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2023-09-01 13:25:44,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:25:44,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 87 transitions, 746 flow. Second operand has 22 states, 22 states have (on average 61.86363636363637) internal successors, (1361), 22 states have internal predecessors, (1361), 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 13:25:44,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:44,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:25:44,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:46,010 INFO L130 PetriNetUnfolder]: 298/649 cut-off events. [2023-09-01 13:25:46,010 INFO L131 PetriNetUnfolder]: For 2333/2333 co-relation queries the response was YES. [2023-09-01 13:25:46,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2892 conditions, 649 events. 298/649 cut-off events. For 2333/2333 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3532 event pairs, 2 based on Foata normal form. 6/651 useless extension candidates. Maximal degree in co-relation 2820. Up to 182 conditions per place. [2023-09-01 13:25:46,015 INFO L137 encePairwiseOnDemand]: 143/152 looper letters, 145 selfloop transitions, 94 changer transitions 31/270 dead transitions. [2023-09-01 13:25:46,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 270 transitions, 2195 flow [2023-09-01 13:25:46,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-09-01 13:25:46,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-09-01 13:25:46,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2501 transitions. [2023-09-01 13:25:46,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43299861495844877 [2023-09-01 13:25:46,019 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2501 transitions. [2023-09-01 13:25:46,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2501 transitions. [2023-09-01 13:25:46,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:46,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2501 transitions. [2023-09-01 13:25:46,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 65.8157894736842) internal successors, (2501), 38 states have internal predecessors, (2501), 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 13:25:46,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 152.0) internal successors, (5928), 39 states have internal predecessors, (5928), 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 13:25:46,029 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 152.0) internal successors, (5928), 39 states have internal predecessors, (5928), 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 13:25:46,029 INFO L175 Difference]: Start difference. First operand has 105 places, 87 transitions, 746 flow. Second operand 38 states and 2501 transitions. [2023-09-01 13:25:46,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 270 transitions, 2195 flow [2023-09-01 13:25:46,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 270 transitions, 2085 flow, removed 18 selfloop flow, removed 11 redundant places. [2023-09-01 13:25:46,042 INFO L231 Difference]: Finished difference. Result has 139 places, 141 transitions, 1449 flow [2023-09-01 13:25:46,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1449, PETRI_PLACES=139, PETRI_TRANSITIONS=141} [2023-09-01 13:25:46,043 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 119 predicate places. [2023-09-01 13:25:46,043 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 141 transitions, 1449 flow [2023-09-01 13:25:46,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.86363636363637) internal successors, (1361), 22 states have internal predecessors, (1361), 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 13:25:46,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:46,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:46,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-09-01 13:25:46,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 13:25:46,265 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:25:46,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:46,265 INFO L85 PathProgramCache]: Analyzing trace with hash -749756410, now seen corresponding path program 1 times [2023-09-01 13:25:46,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:46,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524630541] [2023-09-01 13:25:46,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:46,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:46,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:46,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:46,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524630541] [2023-09-01 13:25:46,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524630541] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:25:46,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731544476] [2023-09-01 13:25:46,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:46,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:46,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:25:46,390 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:25:46,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 13:25:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:46,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 13:25:46,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:25:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:46,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:25:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:46,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731544476] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:25:46,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:25:46,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-09-01 13:25:46,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176828895] [2023-09-01 13:25:46,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:25:46,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 13:25:46,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:46,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 13:25:46,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-09-01 13:25:46,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:25:46,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 141 transitions, 1449 flow. Second operand has 18 states, 18 states have (on average 61.72222222222222) internal successors, (1111), 18 states have internal predecessors, (1111), 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 13:25:46,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:46,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:25:46,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:47,434 INFO L130 PetriNetUnfolder]: 427/905 cut-off events. [2023-09-01 13:25:47,434 INFO L131 PetriNetUnfolder]: For 4514/4514 co-relation queries the response was YES. [2023-09-01 13:25:47,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4653 conditions, 905 events. 427/905 cut-off events. For 4514/4514 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5277 event pairs, 10 based on Foata normal form. 5/908 useless extension candidates. Maximal degree in co-relation 4436. Up to 237 conditions per place. [2023-09-01 13:25:47,444 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 164 selfloop transitions, 68 changer transitions 17/249 dead transitions. [2023-09-01 13:25:47,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 249 transitions, 2712 flow [2023-09-01 13:25:47,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 13:25:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 13:25:47,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1139 transitions. [2023-09-01 13:25:47,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4407894736842105 [2023-09-01 13:25:47,447 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1139 transitions. [2023-09-01 13:25:47,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1139 transitions. [2023-09-01 13:25:47,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:47,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1139 transitions. [2023-09-01 13:25:47,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.0) internal successors, (1139), 17 states have internal predecessors, (1139), 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 13:25:47,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 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 13:25:47,453 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 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 13:25:47,453 INFO L175 Difference]: Start difference. First operand has 139 places, 141 transitions, 1449 flow. Second operand 17 states and 1139 transitions. [2023-09-01 13:25:47,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 249 transitions, 2712 flow [2023-09-01 13:25:47,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 249 transitions, 2279 flow, removed 191 selfloop flow, removed 15 redundant places. [2023-09-01 13:25:47,482 INFO L231 Difference]: Finished difference. Result has 141 places, 156 transitions, 1585 flow [2023-09-01 13:25:47,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1585, PETRI_PLACES=141, PETRI_TRANSITIONS=156} [2023-09-01 13:25:47,483 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 121 predicate places. [2023-09-01 13:25:47,483 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 156 transitions, 1585 flow [2023-09-01 13:25:47,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 61.72222222222222) internal successors, (1111), 18 states have internal predecessors, (1111), 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 13:25:47,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:47,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:47,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 13:25:47,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 13:25:47,688 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:25:47,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:47,689 INFO L85 PathProgramCache]: Analyzing trace with hash 976032698, now seen corresponding path program 2 times [2023-09-01 13:25:47,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:47,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877705633] [2023-09-01 13:25:47,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:47,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:47,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:47,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877705633] [2023-09-01 13:25:47,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877705633] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:25:47,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441848149] [2023-09-01 13:25:47,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:25:47,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:47,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:25:47,834 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:25:47,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 13:25:47,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:25:47,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:25:47,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 13:25:47,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:25:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:48,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:25:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:48,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441848149] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:25:48,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:25:48,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-09-01 13:25:48,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343404237] [2023-09-01 13:25:48,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:25:48,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 13:25:48,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:48,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 13:25:48,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-09-01 13:25:48,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:25:48,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 156 transitions, 1585 flow. Second operand has 18 states, 18 states have (on average 61.72222222222222) internal successors, (1111), 18 states have internal predecessors, (1111), 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 13:25:48,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:48,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:25:48,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:48,839 INFO L130 PetriNetUnfolder]: 411/855 cut-off events. [2023-09-01 13:25:48,839 INFO L131 PetriNetUnfolder]: For 3772/3772 co-relation queries the response was YES. [2023-09-01 13:25:48,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4270 conditions, 855 events. 411/855 cut-off events. For 3772/3772 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4799 event pairs, 10 based on Foata normal form. 5/860 useless extension candidates. Maximal degree in co-relation 4149. Up to 217 conditions per place. [2023-09-01 13:25:48,846 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 139 selfloop transitions, 60 changer transitions 40/239 dead transitions. [2023-09-01 13:25:48,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 239 transitions, 2513 flow [2023-09-01 13:25:48,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 13:25:48,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 13:25:48,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1251 transitions. [2023-09-01 13:25:48,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43317174515235457 [2023-09-01 13:25:48,848 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1251 transitions. [2023-09-01 13:25:48,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1251 transitions. [2023-09-01 13:25:48,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:48,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1251 transitions. [2023-09-01 13:25:48,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 65.84210526315789) internal successors, (1251), 19 states have internal predecessors, (1251), 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 13:25:48,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 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 13:25:48,853 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 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 13:25:48,854 INFO L175 Difference]: Start difference. First operand has 141 places, 156 transitions, 1585 flow. Second operand 19 states and 1251 transitions. [2023-09-01 13:25:48,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 239 transitions, 2513 flow [2023-09-01 13:25:48,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 239 transitions, 2420 flow, removed 21 selfloop flow, removed 11 redundant places. [2023-09-01 13:25:48,876 INFO L231 Difference]: Finished difference. Result has 149 places, 142 transitions, 1473 flow [2023-09-01 13:25:48,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=1515, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1473, PETRI_PLACES=149, PETRI_TRANSITIONS=142} [2023-09-01 13:25:48,877 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 129 predicate places. [2023-09-01 13:25:48,877 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 142 transitions, 1473 flow [2023-09-01 13:25:48,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 61.72222222222222) internal successors, (1111), 18 states have internal predecessors, (1111), 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 13:25:48,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:48,877 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:48,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 13:25:49,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 13:25:49,085 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:25:49,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:49,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1591276241, now seen corresponding path program 10 times [2023-09-01 13:25:49,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:49,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431835142] [2023-09-01 13:25:49,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:49,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:49,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:49,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:49,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431835142] [2023-09-01 13:25:49,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431835142] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:25:49,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257561148] [2023-09-01 13:25:49,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:25:49,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:49,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:25:49,241 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:25:49,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 13:25:49,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:25:49,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:25:49,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 13:25:49,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:25:49,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:49,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:25:49,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:49,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257561148] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:25:49,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:25:49,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-09-01 13:25:49,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554383744] [2023-09-01 13:25:49,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:25:49,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 13:25:49,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:49,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 13:25:49,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-09-01 13:25:49,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:25:49,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 142 transitions, 1473 flow. Second operand has 22 states, 22 states have (on average 61.86363636363637) internal successors, (1361), 22 states have internal predecessors, (1361), 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 13:25:49,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:49,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:25:49,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:50,963 INFO L130 PetriNetUnfolder]: 334/717 cut-off events. [2023-09-01 13:25:50,963 INFO L131 PetriNetUnfolder]: For 3992/3992 co-relation queries the response was YES. [2023-09-01 13:25:50,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3656 conditions, 717 events. 334/717 cut-off events. For 3992/3992 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3975 event pairs, 2 based on Foata normal form. 4/721 useless extension candidates. Maximal degree in co-relation 3542. Up to 274 conditions per place. [2023-09-01 13:25:50,968 INFO L137 encePairwiseOnDemand]: 143/152 looper letters, 112 selfloop transitions, 78 changer transitions 24/214 dead transitions. [2023-09-01 13:25:50,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 214 transitions, 2109 flow [2023-09-01 13:25:50,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 13:25:50,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 13:25:50,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1768 transitions. [2023-09-01 13:25:50,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43079922027290446 [2023-09-01 13:25:50,971 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1768 transitions. [2023-09-01 13:25:50,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1768 transitions. [2023-09-01 13:25:50,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:50,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1768 transitions. [2023-09-01 13:25:50,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 65.48148148148148) internal successors, (1768), 27 states have internal predecessors, (1768), 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 13:25:50,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 152.0) internal successors, (4256), 28 states have internal predecessors, (4256), 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 13:25:50,978 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 152.0) internal successors, (4256), 28 states have internal predecessors, (4256), 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 13:25:50,978 INFO L175 Difference]: Start difference. First operand has 149 places, 142 transitions, 1473 flow. Second operand 27 states and 1768 transitions. [2023-09-01 13:25:50,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 214 transitions, 2109 flow [2023-09-01 13:25:50,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 214 transitions, 1933 flow, removed 31 selfloop flow, removed 17 redundant places. [2023-09-01 13:25:50,997 INFO L231 Difference]: Finished difference. Result has 153 places, 137 transitions, 1439 flow [2023-09-01 13:25:50,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1439, PETRI_PLACES=153, PETRI_TRANSITIONS=137} [2023-09-01 13:25:50,997 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 133 predicate places. [2023-09-01 13:25:50,998 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 137 transitions, 1439 flow [2023-09-01 13:25:50,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.86363636363637) internal successors, (1361), 22 states have internal predecessors, (1361), 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 13:25:50,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:50,998 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:51,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 13:25:51,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 13:25:51,203 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:25:51,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:51,204 INFO L85 PathProgramCache]: Analyzing trace with hash 716408728, now seen corresponding path program 11 times [2023-09-01 13:25:51,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:51,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669126752] [2023-09-01 13:25:51,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:51,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:25:51,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:51,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669126752] [2023-09-01 13:25:51,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669126752] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:25:51,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246896049] [2023-09-01 13:25:51,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:25:51,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:51,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:25:51,385 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:25:51,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 13:25:51,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 13:25:51,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:25:51,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 13:25:51,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:25:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:51,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:25:51,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:51,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246896049] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:25:51,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:25:51,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-09-01 13:25:51,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790868024] [2023-09-01 13:25:51,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:25:51,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 13:25:51,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:51,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 13:25:51,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-09-01 13:25:52,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:25:52,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 137 transitions, 1439 flow. Second operand has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 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 13:25:52,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:52,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:25:52,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:54,435 INFO L130 PetriNetUnfolder]: 603/1334 cut-off events. [2023-09-01 13:25:54,435 INFO L131 PetriNetUnfolder]: For 8809/8809 co-relation queries the response was YES. [2023-09-01 13:25:54,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7150 conditions, 1334 events. 603/1334 cut-off events. For 8809/8809 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8815 event pairs, 6 based on Foata normal form. 8/1342 useless extension candidates. Maximal degree in co-relation 7085. Up to 373 conditions per place. [2023-09-01 13:25:54,443 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 254 selfloop transitions, 179 changer transitions 41/474 dead transitions. [2023-09-01 13:25:54,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 474 transitions, 4798 flow [2023-09-01 13:25:54,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-09-01 13:25:54,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-09-01 13:25:54,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 4326 transitions. [2023-09-01 13:25:54,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312200956937799 [2023-09-01 13:25:54,450 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 4326 transitions. [2023-09-01 13:25:54,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 4326 transitions. [2023-09-01 13:25:54,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:54,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 4326 transitions. [2023-09-01 13:25:54,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 65.54545454545455) internal successors, (4326), 66 states have internal predecessors, (4326), 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 13:25:54,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 152.0) internal successors, (10184), 67 states have internal predecessors, (10184), 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 13:25:54,465 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 152.0) internal successors, (10184), 67 states have internal predecessors, (10184), 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 13:25:54,465 INFO L175 Difference]: Start difference. First operand has 153 places, 137 transitions, 1439 flow. Second operand 66 states and 4326 transitions. [2023-09-01 13:25:54,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 474 transitions, 4798 flow [2023-09-01 13:25:54,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 474 transitions, 4165 flow, removed 127 selfloop flow, removed 21 redundant places. [2023-09-01 13:25:54,500 INFO L231 Difference]: Finished difference. Result has 217 places, 243 transitions, 2985 flow [2023-09-01 13:25:54,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=2985, PETRI_PLACES=217, PETRI_TRANSITIONS=243} [2023-09-01 13:25:54,501 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 197 predicate places. [2023-09-01 13:25:54,501 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 243 transitions, 2985 flow [2023-09-01 13:25:54,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 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 13:25:54,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:54,501 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:54,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 13:25:54,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:54,702 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:25:54,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:54,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1336338705, now seen corresponding path program 3 times [2023-09-01 13:25:54,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:54,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058727404] [2023-09-01 13:25:54,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:54,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:54,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:54,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058727404] [2023-09-01 13:25:54,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058727404] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:25:54,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87888400] [2023-09-01 13:25:54,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:25:54,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:54,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:25:54,838 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:25:54,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 13:25:54,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:25:54,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:25:54,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 13:25:54,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:25:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:55,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:25:55,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:25:55,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87888400] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:25:55,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:25:55,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-09-01 13:25:55,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096812775] [2023-09-01 13:25:55,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:25:55,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 13:25:55,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:55,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 13:25:55,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-09-01 13:25:55,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:25:55,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 243 transitions, 2985 flow. Second operand has 19 states, 19 states have (on average 61.73684210526316) internal successors, (1173), 19 states have internal predecessors, (1173), 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 13:25:55,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:55,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:25:55,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:55,741 INFO L130 PetriNetUnfolder]: 625/1370 cut-off events. [2023-09-01 13:25:55,741 INFO L131 PetriNetUnfolder]: For 14056/14056 co-relation queries the response was YES. [2023-09-01 13:25:55,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8302 conditions, 1370 events. 625/1370 cut-off events. For 14056/14056 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9032 event pairs, 24 based on Foata normal form. 10/1376 useless extension candidates. Maximal degree in co-relation 7761. Up to 583 conditions per place. [2023-09-01 13:25:55,751 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 182 selfloop transitions, 83 changer transitions 44/309 dead transitions. [2023-09-01 13:25:55,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 309 transitions, 3955 flow [2023-09-01 13:25:55,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 13:25:55,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 13:25:55,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1125 transitions. [2023-09-01 13:25:55,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537151702786375 [2023-09-01 13:25:55,753 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1125 transitions. [2023-09-01 13:25:55,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1125 transitions. [2023-09-01 13:25:55,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:55,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1125 transitions. [2023-09-01 13:25:55,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 66.17647058823529) internal successors, (1125), 17 states have internal predecessors, (1125), 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 13:25:55,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 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 13:25:55,757 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 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 13:25:55,757 INFO L175 Difference]: Start difference. First operand has 217 places, 243 transitions, 2985 flow. Second operand 17 states and 1125 transitions. [2023-09-01 13:25:55,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 309 transitions, 3955 flow [2023-09-01 13:25:55,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 309 transitions, 3131 flow, removed 297 selfloop flow, removed 33 redundant places. [2023-09-01 13:25:55,853 INFO L231 Difference]: Finished difference. Result has 198 places, 236 transitions, 2394 flow [2023-09-01 13:25:55,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2278, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2394, PETRI_PLACES=198, PETRI_TRANSITIONS=236} [2023-09-01 13:25:55,854 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 178 predicate places. [2023-09-01 13:25:55,854 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 236 transitions, 2394 flow [2023-09-01 13:25:55,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 61.73684210526316) internal successors, (1173), 19 states have internal predecessors, (1173), 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 13:25:55,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:55,854 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:55,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 13:25:56,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:56,059 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:25:56,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:56,060 INFO L85 PathProgramCache]: Analyzing trace with hash 644016598, now seen corresponding path program 12 times [2023-09-01 13:25:56,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:56,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172706040] [2023-09-01 13:25:56,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:56,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:56,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:25:56,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:56,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172706040] [2023-09-01 13:25:56,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172706040] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:25:56,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863154622] [2023-09-01 13:25:56,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:25:56,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:56,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:25:56,261 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:25:56,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 13:25:56,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 13:25:56,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:25:56,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 13:25:56,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:25:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:56,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:25:56,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:56,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863154622] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:25:56,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:25:56,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-09-01 13:25:56,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983591465] [2023-09-01 13:25:56,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:25:56,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 13:25:56,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:56,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 13:25:56,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2023-09-01 13:25:56,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:25:56,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 236 transitions, 2394 flow. Second operand has 24 states, 24 states have (on average 61.875) internal successors, (1485), 24 states have internal predecessors, (1485), 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 13:25:56,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:56,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:25:56,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:58,732 INFO L130 PetriNetUnfolder]: 574/1252 cut-off events. [2023-09-01 13:25:58,732 INFO L131 PetriNetUnfolder]: For 10627/10627 co-relation queries the response was YES. [2023-09-01 13:25:58,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6582 conditions, 1252 events. 574/1252 cut-off events. For 10627/10627 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 8099 event pairs, 6 based on Foata normal form. 9/1257 useless extension candidates. Maximal degree in co-relation 6396. Up to 299 conditions per place. [2023-09-01 13:25:58,741 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 219 selfloop transitions, 154 changer transitions 42/415 dead transitions. [2023-09-01 13:25:58,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 415 transitions, 4204 flow [2023-09-01 13:25:58,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-09-01 13:25:58,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-09-01 13:25:58,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3418 transitions. [2023-09-01 13:25:58,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4324392712550607 [2023-09-01 13:25:58,745 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3418 transitions. [2023-09-01 13:25:58,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3418 transitions. [2023-09-01 13:25:58,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:58,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3418 transitions. [2023-09-01 13:25:58,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 65.73076923076923) internal successors, (3418), 52 states have internal predecessors, (3418), 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 13:25:58,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 152.0) internal successors, (8056), 53 states have internal predecessors, (8056), 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 13:25:58,757 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 152.0) internal successors, (8056), 53 states have internal predecessors, (8056), 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 13:25:58,757 INFO L175 Difference]: Start difference. First operand has 198 places, 236 transitions, 2394 flow. Second operand 52 states and 3418 transitions. [2023-09-01 13:25:58,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 415 transitions, 4204 flow [2023-09-01 13:25:58,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 415 transitions, 3734 flow, removed 114 selfloop flow, removed 22 redundant places. [2023-09-01 13:25:58,806 INFO L231 Difference]: Finished difference. Result has 232 places, 236 transitions, 2576 flow [2023-09-01 13:25:58,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2115, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=2576, PETRI_PLACES=232, PETRI_TRANSITIONS=236} [2023-09-01 13:25:58,807 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 212 predicate places. [2023-09-01 13:25:58,807 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 236 transitions, 2576 flow [2023-09-01 13:25:58,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.875) internal successors, (1485), 24 states have internal predecessors, (1485), 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 13:25:58,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:58,808 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:58,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 13:25:59,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:59,013 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:25:59,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:59,013 INFO L85 PathProgramCache]: Analyzing trace with hash -677900520, now seen corresponding path program 13 times [2023-09-01 13:25:59,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:59,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868183328] [2023-09-01 13:25:59,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:59,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:25:59,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:59,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868183328] [2023-09-01 13:25:59,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868183328] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:25:59,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999210970] [2023-09-01 13:25:59,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:25:59,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:59,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:25:59,197 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:25:59,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 13:25:59,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:59,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 13:25:59,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:25:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:59,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:25:59,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:59,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999210970] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:25:59,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:25:59,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-09-01 13:25:59,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130488702] [2023-09-01 13:25:59,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:25:59,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 13:25:59,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:59,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 13:25:59,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2023-09-01 13:25:59,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:25:59,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 236 transitions, 2576 flow. Second operand has 24 states, 24 states have (on average 61.916666666666664) internal successors, (1486), 24 states have internal predecessors, (1486), 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 13:25:59,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:59,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:25:59,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:00,562 INFO L130 PetriNetUnfolder]: 552/1188 cut-off events. [2023-09-01 13:26:00,563 INFO L131 PetriNetUnfolder]: For 8278/8278 co-relation queries the response was YES. [2023-09-01 13:26:00,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6347 conditions, 1188 events. 552/1188 cut-off events. For 8278/8278 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7464 event pairs, 10 based on Foata normal form. 3/1187 useless extension candidates. Maximal degree in co-relation 6208. Up to 307 conditions per place. [2023-09-01 13:26:00,570 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 145 selfloop transitions, 141 changer transitions 36/322 dead transitions. [2023-09-01 13:26:00,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 322 transitions, 3658 flow [2023-09-01 13:26:00,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 13:26:00,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 13:26:00,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1523 transitions. [2023-09-01 13:26:00,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43564073226544625 [2023-09-01 13:26:00,572 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1523 transitions. [2023-09-01 13:26:00,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1523 transitions. [2023-09-01 13:26:00,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:00,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1523 transitions. [2023-09-01 13:26:00,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 66.21739130434783) internal successors, (1523), 23 states have internal predecessors, (1523), 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 13:26:00,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 152.0) internal successors, (3648), 24 states have internal predecessors, (3648), 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 13:26:00,577 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 152.0) internal successors, (3648), 24 states have internal predecessors, (3648), 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 13:26:00,578 INFO L175 Difference]: Start difference. First operand has 232 places, 236 transitions, 2576 flow. Second operand 23 states and 1523 transitions. [2023-09-01 13:26:00,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 322 transitions, 3658 flow [2023-09-01 13:26:00,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 322 transitions, 3333 flow, removed 77 selfloop flow, removed 29 redundant places. [2023-09-01 13:26:00,617 INFO L231 Difference]: Finished difference. Result has 217 places, 233 transitions, 2639 flow [2023-09-01 13:26:00,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2299, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2639, PETRI_PLACES=217, PETRI_TRANSITIONS=233} [2023-09-01 13:26:00,618 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 197 predicate places. [2023-09-01 13:26:00,618 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 233 transitions, 2639 flow [2023-09-01 13:26:00,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.916666666666664) internal successors, (1486), 24 states have internal predecessors, (1486), 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 13:26:00,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:00,618 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:00,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:00,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-09-01 13:26:00,819 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:00,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:00,819 INFO L85 PathProgramCache]: Analyzing trace with hash 948168439, now seen corresponding path program 4 times [2023-09-01 13:26:00,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:00,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680923201] [2023-09-01 13:26:00,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:00,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:00,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:00,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680923201] [2023-09-01 13:26:00,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680923201] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:00,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935203503] [2023-09-01 13:26:00,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:26:00,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:00,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:00,950 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:00,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 13:26:01,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:26:01,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:01,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 13:26:01,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:01,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:01,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:26:01,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935203503] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:01,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:01,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-09-01 13:26:01,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259766403] [2023-09-01 13:26:01,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:01,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 13:26:01,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:01,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 13:26:01,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-09-01 13:26:01,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:26:01,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 233 transitions, 2639 flow. Second operand has 20 states, 20 states have (on average 61.75) internal successors, (1235), 20 states have internal predecessors, (1235), 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 13:26:01,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:01,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:26:01,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:01,971 INFO L130 PetriNetUnfolder]: 532/1147 cut-off events. [2023-09-01 13:26:01,971 INFO L131 PetriNetUnfolder]: For 8132/8132 co-relation queries the response was YES. [2023-09-01 13:26:01,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6162 conditions, 1147 events. 532/1147 cut-off events. For 8132/8132 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7147 event pairs, 10 based on Foata normal form. 10/1153 useless extension candidates. Maximal degree in co-relation 5956. Up to 341 conditions per place. [2023-09-01 13:26:01,978 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 173 selfloop transitions, 90 changer transitions 50/313 dead transitions. [2023-09-01 13:26:01,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 313 transitions, 3653 flow [2023-09-01 13:26:01,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 13:26:01,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 13:26:01,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1383 transitions. [2023-09-01 13:26:01,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4332706766917293 [2023-09-01 13:26:01,980 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1383 transitions. [2023-09-01 13:26:01,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1383 transitions. [2023-09-01 13:26:01,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:01,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1383 transitions. [2023-09-01 13:26:01,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 65.85714285714286) internal successors, (1383), 21 states have internal predecessors, (1383), 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 13:26:01,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 152.0) internal successors, (3344), 22 states have internal predecessors, (3344), 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 13:26:01,984 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 152.0) internal successors, (3344), 22 states have internal predecessors, (3344), 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 13:26:01,984 INFO L175 Difference]: Start difference. First operand has 217 places, 233 transitions, 2639 flow. Second operand 21 states and 1383 transitions. [2023-09-01 13:26:01,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 313 transitions, 3653 flow [2023-09-01 13:26:02,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 313 transitions, 3319 flow, removed 80 selfloop flow, removed 15 redundant places. [2023-09-01 13:26:02,019 INFO L231 Difference]: Finished difference. Result has 221 places, 216 transitions, 2336 flow [2023-09-01 13:26:02,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2335, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2336, PETRI_PLACES=221, PETRI_TRANSITIONS=216} [2023-09-01 13:26:02,019 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 201 predicate places. [2023-09-01 13:26:02,019 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 216 transitions, 2336 flow [2023-09-01 13:26:02,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.75) internal successors, (1235), 20 states have internal predecessors, (1235), 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 13:26:02,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:02,020 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:02,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:02,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:02,224 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:02,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:02,224 INFO L85 PathProgramCache]: Analyzing trace with hash -731371048, now seen corresponding path program 14 times [2023-09-01 13:26:02,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:02,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042046798] [2023-09-01 13:26:02,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:02,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:02,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:02,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:02,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042046798] [2023-09-01 13:26:02,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042046798] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:02,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030345459] [2023-09-01 13:26:02,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:26:02,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:02,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:02,363 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:02,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 13:26:02,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:26:02,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:02,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 13:26:02,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:02,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:02,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030345459] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:02,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:02,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-09-01 13:26:02,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778550105] [2023-09-01 13:26:02,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:02,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 13:26:02,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:02,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 13:26:02,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-09-01 13:26:03,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:26:03,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 216 transitions, 2336 flow. Second operand has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 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 13:26:03,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:03,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:26:03,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:04,186 INFO L130 PetriNetUnfolder]: 573/1253 cut-off events. [2023-09-01 13:26:04,187 INFO L131 PetriNetUnfolder]: For 9713/9713 co-relation queries the response was YES. [2023-09-01 13:26:04,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6690 conditions, 1253 events. 573/1253 cut-off events. For 9713/9713 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 8092 event pairs, 6 based on Foata normal form. 13/1262 useless extension candidates. Maximal degree in co-relation 6613. Up to 343 conditions per place. [2023-09-01 13:26:04,193 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 139 selfloop transitions, 144 changer transitions 94/377 dead transitions. [2023-09-01 13:26:04,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 377 transitions, 4416 flow [2023-09-01 13:26:04,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-09-01 13:26:04,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-09-01 13:26:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2525 transitions. [2023-09-01 13:26:04,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425944669365722 [2023-09-01 13:26:04,203 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2525 transitions. [2023-09-01 13:26:04,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2525 transitions. [2023-09-01 13:26:04,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:04,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2525 transitions. [2023-09-01 13:26:04,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 64.74358974358974) internal successors, (2525), 39 states have internal predecessors, (2525), 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 13:26:04,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 152.0) internal successors, (6080), 40 states have internal predecessors, (6080), 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 13:26:04,211 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 152.0) internal successors, (6080), 40 states have internal predecessors, (6080), 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 13:26:04,211 INFO L175 Difference]: Start difference. First operand has 221 places, 216 transitions, 2336 flow. Second operand 39 states and 2525 transitions. [2023-09-01 13:26:04,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 377 transitions, 4416 flow [2023-09-01 13:26:04,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 377 transitions, 4066 flow, removed 60 selfloop flow, removed 26 redundant places. [2023-09-01 13:26:04,259 INFO L231 Difference]: Finished difference. Result has 228 places, 211 transitions, 2624 flow [2023-09-01 13:26:04,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2624, PETRI_PLACES=228, PETRI_TRANSITIONS=211} [2023-09-01 13:26:04,260 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 208 predicate places. [2023-09-01 13:26:04,260 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 211 transitions, 2624 flow [2023-09-01 13:26:04,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 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 13:26:04,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:04,260 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:04,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:04,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:04,465 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:04,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:04,466 INFO L85 PathProgramCache]: Analyzing trace with hash 767361305, now seen corresponding path program 5 times [2023-09-01 13:26:04,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:04,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407820667] [2023-09-01 13:26:04,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:04,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:04,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:04,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:04,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407820667] [2023-09-01 13:26:04,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407820667] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:04,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143676462] [2023-09-01 13:26:04,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:26:04,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:04,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:04,646 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:04,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 13:26:04,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 13:26:04,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:04,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 13:26:04,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:04,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:04,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:04,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143676462] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:04,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:04,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-09-01 13:26:04,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268204470] [2023-09-01 13:26:04,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:04,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 13:26:04,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:04,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 13:26:04,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-09-01 13:26:05,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:26:05,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 211 transitions, 2624 flow. Second operand has 20 states, 20 states have (on average 61.65) internal successors, (1233), 20 states have internal predecessors, (1233), 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 13:26:05,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:05,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:26:05,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:05,892 INFO L130 PetriNetUnfolder]: 488/1033 cut-off events. [2023-09-01 13:26:05,893 INFO L131 PetriNetUnfolder]: For 8940/8940 co-relation queries the response was YES. [2023-09-01 13:26:05,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5916 conditions, 1033 events. 488/1033 cut-off events. For 8940/8940 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6133 event pairs, 12 based on Foata normal form. 14/1047 useless extension candidates. Maximal degree in co-relation 5861. Up to 307 conditions per place. [2023-09-01 13:26:05,898 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 172 selfloop transitions, 102 changer transitions 33/307 dead transitions. [2023-09-01 13:26:05,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 307 transitions, 4032 flow [2023-09-01 13:26:05,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 13:26:05,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 13:26:05,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1571 transitions. [2023-09-01 13:26:05,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43064692982456143 [2023-09-01 13:26:05,900 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1571 transitions. [2023-09-01 13:26:05,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1571 transitions. [2023-09-01 13:26:05,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:05,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1571 transitions. [2023-09-01 13:26:05,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 65.45833333333333) internal successors, (1571), 24 states have internal predecessors, (1571), 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 13:26:05,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 152.0) internal successors, (3800), 25 states have internal predecessors, (3800), 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 13:26:05,904 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 152.0) internal successors, (3800), 25 states have internal predecessors, (3800), 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 13:26:05,904 INFO L175 Difference]: Start difference. First operand has 228 places, 211 transitions, 2624 flow. Second operand 24 states and 1571 transitions. [2023-09-01 13:26:05,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 307 transitions, 4032 flow [2023-09-01 13:26:05,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 307 transitions, 3591 flow, removed 146 selfloop flow, removed 32 redundant places. [2023-09-01 13:26:05,934 INFO L231 Difference]: Finished difference. Result has 191 places, 216 transitions, 2510 flow [2023-09-01 13:26:05,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2510, PETRI_PLACES=191, PETRI_TRANSITIONS=216} [2023-09-01 13:26:05,934 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 171 predicate places. [2023-09-01 13:26:05,934 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 216 transitions, 2510 flow [2023-09-01 13:26:05,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.65) internal successors, (1233), 20 states have internal predecessors, (1233), 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 13:26:05,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:05,935 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:05,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-09-01 13:26:06,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:06,139 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:06,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:06,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1622667959, now seen corresponding path program 6 times [2023-09-01 13:26:06,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:06,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362343151] [2023-09-01 13:26:06,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:06,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:06,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:06,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362343151] [2023-09-01 13:26:06,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362343151] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:06,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034890631] [2023-09-01 13:26:06,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:26:06,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:06,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:06,285 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:06,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 13:26:06,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 13:26:06,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:06,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 13:26:06,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:06,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:06,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:06,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034890631] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:06,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:06,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-09-01 13:26:06,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967822775] [2023-09-01 13:26:06,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:06,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 13:26:06,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:06,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 13:26:06,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-09-01 13:26:06,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:26:06,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 216 transitions, 2510 flow. Second operand has 20 states, 20 states have (on average 61.65) internal successors, (1233), 20 states have internal predecessors, (1233), 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 13:26:06,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:06,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:26:06,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:07,264 INFO L130 PetriNetUnfolder]: 506/1046 cut-off events. [2023-09-01 13:26:07,264 INFO L131 PetriNetUnfolder]: For 7465/7465 co-relation queries the response was YES. [2023-09-01 13:26:07,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5782 conditions, 1046 events. 506/1046 cut-off events. For 7465/7465 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6101 event pairs, 8 based on Foata normal form. 5/1051 useless extension candidates. Maximal degree in co-relation 5735. Up to 329 conditions per place. [2023-09-01 13:26:07,271 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 183 selfloop transitions, 111 changer transitions 17/311 dead transitions. [2023-09-01 13:26:07,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 311 transitions, 3841 flow [2023-09-01 13:26:07,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 13:26:07,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 13:26:07,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1258 transitions. [2023-09-01 13:26:07,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435595567867036 [2023-09-01 13:26:07,278 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1258 transitions. [2023-09-01 13:26:07,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1258 transitions. [2023-09-01 13:26:07,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:07,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1258 transitions. [2023-09-01 13:26:07,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 66.21052631578948) internal successors, (1258), 19 states have internal predecessors, (1258), 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 13:26:07,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 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 13:26:07,283 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 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 13:26:07,284 INFO L175 Difference]: Start difference. First operand has 191 places, 216 transitions, 2510 flow. Second operand 19 states and 1258 transitions. [2023-09-01 13:26:07,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 311 transitions, 3841 flow [2023-09-01 13:26:07,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 311 transitions, 3616 flow, removed 54 selfloop flow, removed 17 redundant places. [2023-09-01 13:26:07,325 INFO L231 Difference]: Finished difference. Result has 194 places, 240 transitions, 2941 flow [2023-09-01 13:26:07,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2338, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2941, PETRI_PLACES=194, PETRI_TRANSITIONS=240} [2023-09-01 13:26:07,326 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 174 predicate places. [2023-09-01 13:26:07,326 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 240 transitions, 2941 flow [2023-09-01 13:26:07,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.65) internal successors, (1233), 20 states have internal predecessors, (1233), 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 13:26:07,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:07,327 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:07,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:07,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-09-01 13:26:07,536 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:07,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:07,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1548978479, now seen corresponding path program 7 times [2023-09-01 13:26:07,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:07,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720370988] [2023-09-01 13:26:07,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:07,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:07,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:07,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720370988] [2023-09-01 13:26:07,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720370988] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:07,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613241204] [2023-09-01 13:26:07,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:26:07,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:07,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:07,684 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:07,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 13:26:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:07,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 13:26:07,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:07,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:08,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:08,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613241204] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:08,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:08,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-09-01 13:26:08,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78003555] [2023-09-01 13:26:08,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:08,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 13:26:08,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:08,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 13:26:08,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-09-01 13:26:08,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:26:08,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 240 transitions, 2941 flow. Second operand has 20 states, 20 states have (on average 61.75) internal successors, (1235), 20 states have internal predecessors, (1235), 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 13:26:08,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:08,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:26:08,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:08,690 INFO L130 PetriNetUnfolder]: 499/1021 cut-off events. [2023-09-01 13:26:08,690 INFO L131 PetriNetUnfolder]: For 7989/7989 co-relation queries the response was YES. [2023-09-01 13:26:08,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5896 conditions, 1021 events. 499/1021 cut-off events. For 7989/7989 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5885 event pairs, 8 based on Foata normal form. 3/1024 useless extension candidates. Maximal degree in co-relation 5845. Up to 329 conditions per place. [2023-09-01 13:26:08,696 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 178 selfloop transitions, 101 changer transitions 19/298 dead transitions. [2023-09-01 13:26:08,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 298 transitions, 3838 flow [2023-09-01 13:26:08,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 13:26:08,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 13:26:08,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1246 transitions. [2023-09-01 13:26:08,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314404432132964 [2023-09-01 13:26:08,702 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1246 transitions. [2023-09-01 13:26:08,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1246 transitions. [2023-09-01 13:26:08,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:08,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1246 transitions. [2023-09-01 13:26:08,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 65.57894736842105) internal successors, (1246), 19 states have internal predecessors, (1246), 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 13:26:08,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 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 13:26:08,706 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 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 13:26:08,706 INFO L175 Difference]: Start difference. First operand has 194 places, 240 transitions, 2941 flow. Second operand 19 states and 1246 transitions. [2023-09-01 13:26:08,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 298 transitions, 3838 flow [2023-09-01 13:26:08,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 298 transitions, 3706 flow, removed 27 selfloop flow, removed 10 redundant places. [2023-09-01 13:26:08,772 INFO L231 Difference]: Finished difference. Result has 202 places, 238 transitions, 3009 flow [2023-09-01 13:26:08,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2825, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3009, PETRI_PLACES=202, PETRI_TRANSITIONS=238} [2023-09-01 13:26:08,773 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 182 predicate places. [2023-09-01 13:26:08,773 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 238 transitions, 3009 flow [2023-09-01 13:26:08,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.75) internal successors, (1235), 20 states have internal predecessors, (1235), 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 13:26:08,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:08,773 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:08,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:08,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-09-01 13:26:08,978 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:08,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:08,979 INFO L85 PathProgramCache]: Analyzing trace with hash 240012320, now seen corresponding path program 15 times [2023-09-01 13:26:08,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:08,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327989206] [2023-09-01 13:26:08,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:08,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:08,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:09,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:09,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:09,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327989206] [2023-09-01 13:26:09,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327989206] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:09,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852980984] [2023-09-01 13:26:09,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:26:09,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:09,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:09,128 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:09,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 13:26:09,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 13:26:09,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:09,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 13:26:09,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:09,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:09,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852980984] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:09,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:09,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-09-01 13:26:09,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028168870] [2023-09-01 13:26:09,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:09,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 13:26:09,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:09,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 13:26:09,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-09-01 13:26:09,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:26:09,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 238 transitions, 3009 flow. Second operand has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 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 13:26:09,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:09,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:26:09,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:11,016 INFO L130 PetriNetUnfolder]: 558/1144 cut-off events. [2023-09-01 13:26:11,016 INFO L131 PetriNetUnfolder]: For 9340/9340 co-relation queries the response was YES. [2023-09-01 13:26:11,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6745 conditions, 1144 events. 558/1144 cut-off events. For 9340/9340 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 6777 event pairs, 3 based on Foata normal form. 5/1149 useless extension candidates. Maximal degree in co-relation 6693. Up to 561 conditions per place. [2023-09-01 13:26:11,022 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 231 selfloop transitions, 85 changer transitions 51/367 dead transitions. [2023-09-01 13:26:11,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 367 transitions, 4711 flow [2023-09-01 13:26:11,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 13:26:11,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 13:26:11,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2386 transitions. [2023-09-01 13:26:11,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42425320056899 [2023-09-01 13:26:11,027 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2386 transitions. [2023-09-01 13:26:11,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2386 transitions. [2023-09-01 13:26:11,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:11,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2386 transitions. [2023-09-01 13:26:11,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 64.48648648648648) internal successors, (2386), 37 states have internal predecessors, (2386), 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 13:26:11,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 152.0) internal successors, (5776), 38 states have internal predecessors, (5776), 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 13:26:11,035 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 152.0) internal successors, (5776), 38 states have internal predecessors, (5776), 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 13:26:11,035 INFO L175 Difference]: Start difference. First operand has 202 places, 238 transitions, 3009 flow. Second operand 37 states and 2386 transitions. [2023-09-01 13:26:11,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 367 transitions, 4711 flow [2023-09-01 13:26:11,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 367 transitions, 4424 flow, removed 49 selfloop flow, removed 17 redundant places. [2023-09-01 13:26:11,084 INFO L231 Difference]: Finished difference. Result has 227 places, 258 transitions, 3410 flow [2023-09-01 13:26:11,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2750, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3410, PETRI_PLACES=227, PETRI_TRANSITIONS=258} [2023-09-01 13:26:11,090 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 207 predicate places. [2023-09-01 13:26:11,090 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 258 transitions, 3410 flow [2023-09-01 13:26:11,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 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 13:26:11,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:11,091 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:11,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:11,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-09-01 13:26:11,296 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:11,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:11,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2011172568, now seen corresponding path program 16 times [2023-09-01 13:26:11,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:11,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700759430] [2023-09-01 13:26:11,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:11,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:26:11,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:11,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700759430] [2023-09-01 13:26:11,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700759430] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:11,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925667758] [2023-09-01 13:26:11,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:26:11,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:11,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:11,452 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:11,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 13:26:11,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:26:11,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:11,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 13:26:11,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:11,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:11,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925667758] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:11,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:11,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-09-01 13:26:11,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155664974] [2023-09-01 13:26:11,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:11,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 13:26:11,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:11,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 13:26:11,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2023-09-01 13:26:11,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:26:11,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 258 transitions, 3410 flow. Second operand has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 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 13:26:11,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:11,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:26:11,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:12,416 INFO L130 PetriNetUnfolder]: 521/1041 cut-off events. [2023-09-01 13:26:12,416 INFO L131 PetriNetUnfolder]: For 8851/8851 co-relation queries the response was YES. [2023-09-01 13:26:12,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6454 conditions, 1041 events. 521/1041 cut-off events. For 8851/8851 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5865 event pairs, 7 based on Foata normal form. 3/1044 useless extension candidates. Maximal degree in co-relation 6397. Up to 693 conditions per place. [2023-09-01 13:26:12,424 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 216 selfloop transitions, 46 changer transitions 30/292 dead transitions. [2023-09-01 13:26:12,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 292 transitions, 4160 flow [2023-09-01 13:26:12,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 13:26:12,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 13:26:12,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 963 transitions. [2023-09-01 13:26:12,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42236842105263156 [2023-09-01 13:26:12,426 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 963 transitions. [2023-09-01 13:26:12,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 963 transitions. [2023-09-01 13:26:12,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:12,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 963 transitions. [2023-09-01 13:26:12,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 64.2) internal successors, (963), 15 states have internal predecessors, (963), 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 13:26:12,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 152.0) internal successors, (2432), 16 states have internal predecessors, (2432), 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 13:26:12,429 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 152.0) internal successors, (2432), 16 states have internal predecessors, (2432), 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 13:26:12,430 INFO L175 Difference]: Start difference. First operand has 227 places, 258 transitions, 3410 flow. Second operand 15 states and 963 transitions. [2023-09-01 13:26:12,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 292 transitions, 4160 flow [2023-09-01 13:26:12,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 292 transitions, 3690 flow, removed 164 selfloop flow, removed 21 redundant places. [2023-09-01 13:26:12,483 INFO L231 Difference]: Finished difference. Result has 208 places, 253 transitions, 3010 flow [2023-09-01 13:26:12,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2961, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3010, PETRI_PLACES=208, PETRI_TRANSITIONS=253} [2023-09-01 13:26:12,484 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 188 predicate places. [2023-09-01 13:26:12,484 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 253 transitions, 3010 flow [2023-09-01 13:26:12,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 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 13:26:12,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:12,485 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:12,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:12,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:12,690 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:12,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:12,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1960378635, now seen corresponding path program 8 times [2023-09-01 13:26:12,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:12,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514299407] [2023-09-01 13:26:12,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:12,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:12,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:12,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:12,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:12,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514299407] [2023-09-01 13:26:12,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514299407] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:12,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529334107] [2023-09-01 13:26:12,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:26:12,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:12,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:12,822 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:12,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 13:26:12,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:26:12,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:12,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 13:26:12,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:12,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:12,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:13,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:26:13,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529334107] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:13,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:13,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-09-01 13:26:13,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591245984] [2023-09-01 13:26:13,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:13,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 13:26:13,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:13,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 13:26:13,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-09-01 13:26:13,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:26:13,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 253 transitions, 3010 flow. Second operand has 20 states, 20 states have (on average 61.7) internal successors, (1234), 20 states have internal predecessors, (1234), 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 13:26:13,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:13,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:26:13,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:13,712 INFO L130 PetriNetUnfolder]: 511/1007 cut-off events. [2023-09-01 13:26:13,712 INFO L131 PetriNetUnfolder]: For 8066/8066 co-relation queries the response was YES. [2023-09-01 13:26:13,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5805 conditions, 1007 events. 511/1007 cut-off events. For 8066/8066 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5546 event pairs, 9 based on Foata normal form. 9/1016 useless extension candidates. Maximal degree in co-relation 5752. Up to 657 conditions per place. [2023-09-01 13:26:13,720 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 236 selfloop transitions, 31 changer transitions 41/308 dead transitions. [2023-09-01 13:26:13,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 308 transitions, 3877 flow [2023-09-01 13:26:13,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 13:26:13,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 13:26:13,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1233 transitions. [2023-09-01 13:26:13,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42693905817174516 [2023-09-01 13:26:13,723 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1233 transitions. [2023-09-01 13:26:13,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1233 transitions. [2023-09-01 13:26:13,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:13,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1233 transitions. [2023-09-01 13:26:13,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 64.89473684210526) internal successors, (1233), 19 states have internal predecessors, (1233), 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 13:26:13,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 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 13:26:13,726 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 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 13:26:13,726 INFO L175 Difference]: Start difference. First operand has 208 places, 253 transitions, 3010 flow. Second operand 19 states and 1233 transitions. [2023-09-01 13:26:13,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 308 transitions, 3877 flow [2023-09-01 13:26:13,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 308 transitions, 3653 flow, removed 21 selfloop flow, removed 17 redundant places. [2023-09-01 13:26:13,769 INFO L231 Difference]: Finished difference. Result has 200 places, 241 transitions, 2722 flow [2023-09-01 13:26:13,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2796, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2722, PETRI_PLACES=200, PETRI_TRANSITIONS=241} [2023-09-01 13:26:13,770 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 180 predicate places. [2023-09-01 13:26:13,770 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 241 transitions, 2722 flow [2023-09-01 13:26:13,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.7) internal successors, (1234), 20 states have internal predecessors, (1234), 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 13:26:13,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:13,770 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:13,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-09-01 13:26:13,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:13,975 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:13,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:13,975 INFO L85 PathProgramCache]: Analyzing trace with hash 280573377, now seen corresponding path program 9 times [2023-09-01 13:26:13,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:13,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983366722] [2023-09-01 13:26:13,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:13,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:13,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:14,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:14,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983366722] [2023-09-01 13:26:14,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983366722] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:14,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003156719] [2023-09-01 13:26:14,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:26:14,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:14,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:14,096 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:14,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 13:26:14,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:26:14,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:14,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 13:26:14,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:14,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:14,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:26:14,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003156719] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:14,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:14,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-09-01 13:26:14,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569710269] [2023-09-01 13:26:14,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:14,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 13:26:14,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:14,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 13:26:14,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-09-01 13:26:14,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:26:14,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 241 transitions, 2722 flow. Second operand has 20 states, 20 states have (on average 61.6) internal successors, (1232), 20 states have internal predecessors, (1232), 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 13:26:14,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:14,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:26:14,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:15,083 INFO L130 PetriNetUnfolder]: 463/959 cut-off events. [2023-09-01 13:26:15,084 INFO L131 PetriNetUnfolder]: For 5782/5782 co-relation queries the response was YES. [2023-09-01 13:26:15,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5283 conditions, 959 events. 463/959 cut-off events. For 5782/5782 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5503 event pairs, 7 based on Foata normal form. 7/964 useless extension candidates. Maximal degree in co-relation 5237. Up to 657 conditions per place. [2023-09-01 13:26:15,089 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 248 selfloop transitions, 28 changer transitions 18/294 dead transitions. [2023-09-01 13:26:15,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 294 transitions, 3593 flow [2023-09-01 13:26:15,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 13:26:15,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 13:26:15,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1108 transitions. [2023-09-01 13:26:15,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42879256965944273 [2023-09-01 13:26:15,090 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1108 transitions. [2023-09-01 13:26:15,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1108 transitions. [2023-09-01 13:26:15,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:15,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1108 transitions. [2023-09-01 13:26:15,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 65.17647058823529) internal successors, (1108), 17 states have internal predecessors, (1108), 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 13:26:15,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 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 13:26:15,092 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 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 13:26:15,093 INFO L175 Difference]: Start difference. First operand has 200 places, 241 transitions, 2722 flow. Second operand 17 states and 1108 transitions. [2023-09-01 13:26:15,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 294 transitions, 3593 flow [2023-09-01 13:26:15,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 294 transitions, 3387 flow, removed 31 selfloop flow, removed 16 redundant places. [2023-09-01 13:26:15,121 INFO L231 Difference]: Finished difference. Result has 198 places, 240 transitions, 2638 flow [2023-09-01 13:26:15,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2553, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2638, PETRI_PLACES=198, PETRI_TRANSITIONS=240} [2023-09-01 13:26:15,123 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 178 predicate places. [2023-09-01 13:26:15,123 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 240 transitions, 2638 flow [2023-09-01 13:26:15,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.6) internal successors, (1232), 20 states have internal predecessors, (1232), 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 13:26:15,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:15,124 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:15,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-09-01 13:26:15,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-09-01 13:26:15,325 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:15,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:15,325 INFO L85 PathProgramCache]: Analyzing trace with hash -606930304, now seen corresponding path program 17 times [2023-09-01 13:26:15,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:15,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432728060] [2023-09-01 13:26:15,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:15,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:26:15,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:15,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432728060] [2023-09-01 13:26:15,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432728060] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:15,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483563741] [2023-09-01 13:26:15,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:26:15,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:15,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:15,485 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:15,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 13:26:15,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 13:26:15,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:15,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 13:26:15,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:15,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:15,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:15,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:15,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483563741] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:15,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:15,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-09-01 13:26:15,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999939724] [2023-09-01 13:26:15,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:15,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 13:26:15,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:15,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 13:26:15,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-09-01 13:26:16,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:26:16,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 240 transitions, 2638 flow. Second operand has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 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 13:26:16,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:16,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:26:16,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:17,262 INFO L130 PetriNetUnfolder]: 478/996 cut-off events. [2023-09-01 13:26:17,262 INFO L131 PetriNetUnfolder]: For 5549/5549 co-relation queries the response was YES. [2023-09-01 13:26:17,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5524 conditions, 996 events. 478/996 cut-off events. For 5549/5549 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5773 event pairs, 3 based on Foata normal form. 3/995 useless extension candidates. Maximal degree in co-relation 5478. Up to 535 conditions per place. [2023-09-01 13:26:17,267 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 221 selfloop transitions, 78 changer transitions 18/317 dead transitions. [2023-09-01 13:26:17,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 317 transitions, 3735 flow [2023-09-01 13:26:17,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 13:26:17,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 13:26:17,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1864 transitions. [2023-09-01 13:26:17,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42286751361161523 [2023-09-01 13:26:17,270 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1864 transitions. [2023-09-01 13:26:17,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1864 transitions. [2023-09-01 13:26:17,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:17,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1864 transitions. [2023-09-01 13:26:17,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 64.27586206896552) internal successors, (1864), 29 states have internal predecessors, (1864), 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 13:26:17,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 152.0) internal successors, (4560), 30 states have internal predecessors, (4560), 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 13:26:17,275 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 152.0) internal successors, (4560), 30 states have internal predecessors, (4560), 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 13:26:17,276 INFO L175 Difference]: Start difference. First operand has 198 places, 240 transitions, 2638 flow. Second operand 29 states and 1864 transitions. [2023-09-01 13:26:17,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 317 transitions, 3735 flow [2023-09-01 13:26:17,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 317 transitions, 3663 flow, removed 24 selfloop flow, removed 11 redundant places. [2023-09-01 13:26:17,298 INFO L231 Difference]: Finished difference. Result has 219 places, 251 transitions, 2946 flow [2023-09-01 13:26:17,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2590, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2946, PETRI_PLACES=219, PETRI_TRANSITIONS=251} [2023-09-01 13:26:17,299 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 199 predicate places. [2023-09-01 13:26:17,299 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 251 transitions, 2946 flow [2023-09-01 13:26:17,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 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 13:26:17,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:17,299 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:17,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-09-01 13:26:17,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-09-01 13:26:17,500 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:17,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:17,500 INFO L85 PathProgramCache]: Analyzing trace with hash -579224674, now seen corresponding path program 18 times [2023-09-01 13:26:17,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:17,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718597780] [2023-09-01 13:26:17,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:17,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:17,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:26:17,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:17,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718597780] [2023-09-01 13:26:17,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718597780] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:17,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789264120] [2023-09-01 13:26:17,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:26:17,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:17,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:17,655 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:17,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 13:26:17,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 13:26:17,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:17,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 13:26:17,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:17,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:18,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789264120] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:18,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:18,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-09-01 13:26:18,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118244228] [2023-09-01 13:26:18,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:18,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 13:26:18,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:18,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 13:26:18,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-09-01 13:26:18,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:26:18,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 251 transitions, 2946 flow. Second operand has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 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 13:26:18,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:18,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:26:18,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:19,450 INFO L130 PetriNetUnfolder]: 474/971 cut-off events. [2023-09-01 13:26:19,450 INFO L131 PetriNetUnfolder]: For 6452/6452 co-relation queries the response was YES. [2023-09-01 13:26:19,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5697 conditions, 971 events. 474/971 cut-off events. For 6452/6452 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 5491 event pairs, 5 based on Foata normal form. 6/975 useless extension candidates. Maximal degree in co-relation 5648. Up to 537 conditions per place. [2023-09-01 13:26:19,455 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 199 selfloop transitions, 79 changer transitions 39/317 dead transitions. [2023-09-01 13:26:19,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 317 transitions, 3925 flow [2023-09-01 13:26:19,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-09-01 13:26:19,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-09-01 13:26:19,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2050 transitions. [2023-09-01 13:26:19,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4214638157894737 [2023-09-01 13:26:19,457 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2050 transitions. [2023-09-01 13:26:19,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2050 transitions. [2023-09-01 13:26:19,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:19,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2050 transitions. [2023-09-01 13:26:19,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 64.0625) internal successors, (2050), 32 states have internal predecessors, (2050), 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 13:26:19,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 152.0) internal successors, (5016), 33 states have internal predecessors, (5016), 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 13:26:19,462 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 152.0) internal successors, (5016), 33 states have internal predecessors, (5016), 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 13:26:19,463 INFO L175 Difference]: Start difference. First operand has 219 places, 251 transitions, 2946 flow. Second operand 32 states and 2050 transitions. [2023-09-01 13:26:19,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 317 transitions, 3925 flow [2023-09-01 13:26:19,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 317 transitions, 3777 flow, removed 61 selfloop flow, removed 9 redundant places. [2023-09-01 13:26:19,500 INFO L231 Difference]: Finished difference. Result has 235 places, 246 transitions, 2926 flow [2023-09-01 13:26:19,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2815, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2926, PETRI_PLACES=235, PETRI_TRANSITIONS=246} [2023-09-01 13:26:19,501 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 215 predicate places. [2023-09-01 13:26:19,501 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 246 transitions, 2926 flow [2023-09-01 13:26:19,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 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 13:26:19,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:19,501 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:19,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-09-01 13:26:19,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:19,706 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:19,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:19,707 INFO L85 PathProgramCache]: Analyzing trace with hash 925330163, now seen corresponding path program 19 times [2023-09-01 13:26:19,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:19,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653338478] [2023-09-01 13:26:19,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:19,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:26:19,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:19,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653338478] [2023-09-01 13:26:19,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653338478] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:19,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218452823] [2023-09-01 13:26:19,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:26:19,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:19,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:19,872 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:19,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-09-01 13:26:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:19,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 13:26:19,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:20,134 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:20,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:20,311 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:20,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218452823] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:20,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:20,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 24 [2023-09-01 13:26:20,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625669136] [2023-09-01 13:26:20,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:20,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 13:26:20,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:20,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 13:26:20,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2023-09-01 13:26:20,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:26:20,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 246 transitions, 2926 flow. Second operand has 26 states, 26 states have (on average 61.80769230769231) internal successors, (1607), 26 states have internal predecessors, (1607), 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 13:26:20,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:20,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:26:20,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:21,863 INFO L130 PetriNetUnfolder]: 559/1145 cut-off events. [2023-09-01 13:26:21,863 INFO L131 PetriNetUnfolder]: For 7330/7330 co-relation queries the response was YES. [2023-09-01 13:26:21,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6914 conditions, 1145 events. 559/1145 cut-off events. For 7330/7330 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 6788 event pairs, 3 based on Foata normal form. 3/1146 useless extension candidates. Maximal degree in co-relation 6863. Up to 419 conditions per place. [2023-09-01 13:26:21,869 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 180 selfloop transitions, 198 changer transitions 20/398 dead transitions. [2023-09-01 13:26:21,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 398 transitions, 4924 flow [2023-09-01 13:26:21,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-09-01 13:26:21,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-09-01 13:26:21,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2707 transitions. [2023-09-01 13:26:21,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42402882205513787 [2023-09-01 13:26:21,872 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2707 transitions. [2023-09-01 13:26:21,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2707 transitions. [2023-09-01 13:26:21,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:21,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2707 transitions. [2023-09-01 13:26:21,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 64.45238095238095) internal successors, (2707), 42 states have internal predecessors, (2707), 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 13:26:21,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 152.0) internal successors, (6536), 43 states have internal predecessors, (6536), 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 13:26:21,880 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 152.0) internal successors, (6536), 43 states have internal predecessors, (6536), 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 13:26:21,880 INFO L175 Difference]: Start difference. First operand has 235 places, 246 transitions, 2926 flow. Second operand 42 states and 2707 transitions. [2023-09-01 13:26:21,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 398 transitions, 4924 flow [2023-09-01 13:26:21,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 398 transitions, 4665 flow, removed 76 selfloop flow, removed 23 redundant places. [2023-09-01 13:26:21,925 INFO L231 Difference]: Finished difference. Result has 247 places, 292 transitions, 3892 flow [2023-09-01 13:26:21,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2699, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=3892, PETRI_PLACES=247, PETRI_TRANSITIONS=292} [2023-09-01 13:26:21,925 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 227 predicate places. [2023-09-01 13:26:21,926 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 292 transitions, 3892 flow [2023-09-01 13:26:21,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.80769230769231) internal successors, (1607), 26 states have internal predecessors, (1607), 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 13:26:21,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:21,926 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:21,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:22,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:22,132 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:22,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:22,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1602770469, now seen corresponding path program 20 times [2023-09-01 13:26:22,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:22,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012092850] [2023-09-01 13:26:22,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:22,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:22,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:26:22,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:22,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012092850] [2023-09-01 13:26:22,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012092850] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:22,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262561231] [2023-09-01 13:26:22,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:26:22,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:22,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:22,287 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:22,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-09-01 13:26:22,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:26:22,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:22,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 13:26:22,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:22,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:22,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262561231] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:22,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:22,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 24 [2023-09-01 13:26:22,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610088541] [2023-09-01 13:26:22,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:22,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 13:26:22,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:22,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 13:26:22,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2023-09-01 13:26:23,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:26:23,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 292 transitions, 3892 flow. Second operand has 26 states, 26 states have (on average 61.88461538461539) internal successors, (1609), 26 states have internal predecessors, (1609), 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 13:26:23,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:23,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:26:23,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:24,278 INFO L130 PetriNetUnfolder]: 549/1111 cut-off events. [2023-09-01 13:26:24,279 INFO L131 PetriNetUnfolder]: For 7722/7722 co-relation queries the response was YES. [2023-09-01 13:26:24,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7262 conditions, 1111 events. 549/1111 cut-off events. For 7722/7722 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 6445 event pairs, 3 based on Foata normal form. 3/1102 useless extension candidates. Maximal degree in co-relation 7206. Up to 367 conditions per place. [2023-09-01 13:26:24,285 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 167 selfloop transitions, 180 changer transitions 27/374 dead transitions. [2023-09-01 13:26:24,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 374 transitions, 5031 flow [2023-09-01 13:26:24,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 13:26:24,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 13:26:24,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2384 transitions. [2023-09-01 13:26:24,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238975817923186 [2023-09-01 13:26:24,287 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2384 transitions. [2023-09-01 13:26:24,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2384 transitions. [2023-09-01 13:26:24,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:24,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2384 transitions. [2023-09-01 13:26:24,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 64.43243243243244) internal successors, (2384), 37 states have internal predecessors, (2384), 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 13:26:24,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 152.0) internal successors, (5776), 38 states have internal predecessors, (5776), 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 13:26:24,292 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 152.0) internal successors, (5776), 38 states have internal predecessors, (5776), 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 13:26:24,292 INFO L175 Difference]: Start difference. First operand has 247 places, 292 transitions, 3892 flow. Second operand 37 states and 2384 transitions. [2023-09-01 13:26:24,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 374 transitions, 5031 flow [2023-09-01 13:26:24,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 374 transitions, 4764 flow, removed 64 selfloop flow, removed 20 redundant places. [2023-09-01 13:26:24,345 INFO L231 Difference]: Finished difference. Result has 259 places, 285 transitions, 3911 flow [2023-09-01 13:26:24,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=3617, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3911, PETRI_PLACES=259, PETRI_TRANSITIONS=285} [2023-09-01 13:26:24,346 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 239 predicate places. [2023-09-01 13:26:24,346 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 285 transitions, 3911 flow [2023-09-01 13:26:24,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.88461538461539) internal successors, (1609), 26 states have internal predecessors, (1609), 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 13:26:24,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:24,346 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:24,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:24,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:24,551 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:24,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:24,552 INFO L85 PathProgramCache]: Analyzing trace with hash 11806669, now seen corresponding path program 10 times [2023-09-01 13:26:24,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:24,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913130670] [2023-09-01 13:26:24,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:24,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:24,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:24,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913130670] [2023-09-01 13:26:24,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913130670] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:24,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355962925] [2023-09-01 13:26:24,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:26:24,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:24,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:24,687 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:24,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-09-01 13:26:24,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:26:24,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:24,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 13:26:24,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:24,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:24,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:26:24,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355962925] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:24,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:24,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-09-01 13:26:24,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356913558] [2023-09-01 13:26:24,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:24,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 13:26:24,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:24,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 13:26:24,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2023-09-01 13:26:25,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:26:25,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 285 transitions, 3911 flow. Second operand has 22 states, 22 states have (on average 61.63636363636363) internal successors, (1356), 22 states have internal predecessors, (1356), 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 13:26:25,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:25,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:26:25,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:25,745 INFO L130 PetriNetUnfolder]: 531/1086 cut-off events. [2023-09-01 13:26:25,745 INFO L131 PetriNetUnfolder]: For 7858/7858 co-relation queries the response was YES. [2023-09-01 13:26:25,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7218 conditions, 1086 events. 531/1086 cut-off events. For 7858/7858 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 6316 event pairs, 5 based on Foata normal form. 6/1080 useless extension candidates. Maximal degree in co-relation 7165. Up to 739 conditions per place. [2023-09-01 13:26:25,751 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 233 selfloop transitions, 99 changer transitions 12/344 dead transitions. [2023-09-01 13:26:25,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 344 transitions, 4994 flow [2023-09-01 13:26:25,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 13:26:25,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 13:26:25,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1419 transitions. [2023-09-01 13:26:25,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4243421052631579 [2023-09-01 13:26:25,753 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1419 transitions. [2023-09-01 13:26:25,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1419 transitions. [2023-09-01 13:26:25,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:25,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1419 transitions. [2023-09-01 13:26:25,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 64.5) internal successors, (1419), 22 states have internal predecessors, (1419), 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 13:26:25,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 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 13:26:25,756 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 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 13:26:25,756 INFO L175 Difference]: Start difference. First operand has 259 places, 285 transitions, 3911 flow. Second operand 22 states and 1419 transitions. [2023-09-01 13:26:25,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 344 transitions, 4994 flow [2023-09-01 13:26:25,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 344 transitions, 4586 flow, removed 9 selfloop flow, removed 32 redundant places. [2023-09-01 13:26:25,804 INFO L231 Difference]: Finished difference. Result has 237 places, 295 transitions, 3944 flow [2023-09-01 13:26:25,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=3507, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3944, PETRI_PLACES=237, PETRI_TRANSITIONS=295} [2023-09-01 13:26:25,805 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 217 predicate places. [2023-09-01 13:26:25,805 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 295 transitions, 3944 flow [2023-09-01 13:26:25,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.63636363636363) internal successors, (1356), 22 states have internal predecessors, (1356), 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 13:26:25,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:25,805 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:25,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-09-01 13:26:26,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-09-01 13:26:26,006 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:26,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:26,006 INFO L85 PathProgramCache]: Analyzing trace with hash -61882811, now seen corresponding path program 11 times [2023-09-01 13:26:26,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:26,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806664128] [2023-09-01 13:26:26,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:26,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:26,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:26,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:26,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806664128] [2023-09-01 13:26:26,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806664128] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:26,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971720028] [2023-09-01 13:26:26,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:26:26,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:26,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:26,141 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:26,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-09-01 13:26:26,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 13:26:26,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:26,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 30 conjunts are in the unsatisfiable core [2023-09-01 13:26:26,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:26,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:26,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971720028] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:26,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:26,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-09-01 13:26:26,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391701250] [2023-09-01 13:26:26,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:26,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 13:26:26,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:26,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 13:26:26,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2023-09-01 13:26:26,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:26:26,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 295 transitions, 3944 flow. Second operand has 27 states, 27 states have (on average 61.629629629629626) internal successors, (1664), 27 states have internal predecessors, (1664), 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 13:26:26,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:26,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:26:26,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:27,747 INFO L130 PetriNetUnfolder]: 582/1195 cut-off events. [2023-09-01 13:26:27,747 INFO L131 PetriNetUnfolder]: For 8531/8531 co-relation queries the response was YES. [2023-09-01 13:26:27,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7919 conditions, 1195 events. 582/1195 cut-off events. For 8531/8531 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 7177 event pairs, 1 based on Foata normal form. 4/1185 useless extension candidates. Maximal degree in co-relation 7866. Up to 699 conditions per place. [2023-09-01 13:26:27,754 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 241 selfloop transitions, 117 changer transitions 29/387 dead transitions. [2023-09-01 13:26:27,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 387 transitions, 5428 flow [2023-09-01 13:26:27,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 13:26:27,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 13:26:27,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1752 transitions. [2023-09-01 13:26:27,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4269005847953216 [2023-09-01 13:26:27,756 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1752 transitions. [2023-09-01 13:26:27,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1752 transitions. [2023-09-01 13:26:27,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:27,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1752 transitions. [2023-09-01 13:26:27,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 64.88888888888889) internal successors, (1752), 27 states have internal predecessors, (1752), 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 13:26:27,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 152.0) internal successors, (4256), 28 states have internal predecessors, (4256), 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 13:26:27,759 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 152.0) internal successors, (4256), 28 states have internal predecessors, (4256), 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 13:26:27,759 INFO L175 Difference]: Start difference. First operand has 237 places, 295 transitions, 3944 flow. Second operand 27 states and 1752 transitions. [2023-09-01 13:26:27,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 387 transitions, 5428 flow [2023-09-01 13:26:27,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 387 transitions, 5284 flow, removed 30 selfloop flow, removed 12 redundant places. [2023-09-01 13:26:27,800 INFO L231 Difference]: Finished difference. Result has 253 places, 303 transitions, 4207 flow [2023-09-01 13:26:27,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=3792, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4207, PETRI_PLACES=253, PETRI_TRANSITIONS=303} [2023-09-01 13:26:27,800 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 233 predicate places. [2023-09-01 13:26:27,800 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 303 transitions, 4207 flow [2023-09-01 13:26:27,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 61.629629629629626) internal successors, (1664), 27 states have internal predecessors, (1664), 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 13:26:27,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:27,801 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:27,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:28,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-09-01 13:26:28,007 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:28,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:28,007 INFO L85 PathProgramCache]: Analyzing trace with hash -905503634, now seen corresponding path program 12 times [2023-09-01 13:26:28,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:28,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824612124] [2023-09-01 13:26:28,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:28,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:28,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:28,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:28,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824612124] [2023-09-01 13:26:28,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824612124] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:28,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130579253] [2023-09-01 13:26:28,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:26:28,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:28,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:28,156 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:28,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-09-01 13:26:28,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 13:26:28,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:28,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 13:26:28,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:28,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:28,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:28,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:28,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130579253] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:28,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:28,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 18 [2023-09-01 13:26:28,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568436587] [2023-09-01 13:26:28,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:28,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 13:26:28,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:28,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 13:26:28,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-09-01 13:26:28,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:26:28,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 303 transitions, 4207 flow. Second operand has 20 states, 20 states have (on average 61.8) internal successors, (1236), 20 states have internal predecessors, (1236), 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 13:26:28,595 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:28,595 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:26:28,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:29,112 INFO L130 PetriNetUnfolder]: 569/1145 cut-off events. [2023-09-01 13:26:29,112 INFO L131 PetriNetUnfolder]: For 8719/8719 co-relation queries the response was YES. [2023-09-01 13:26:29,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7948 conditions, 1145 events. 569/1145 cut-off events. For 8719/8719 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 6711 event pairs, 3 based on Foata normal form. 13/1146 useless extension candidates. Maximal degree in co-relation 7890. Up to 413 conditions per place. [2023-09-01 13:26:29,117 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 76 selfloop transitions, 11 changer transitions 278/365 dead transitions. [2023-09-01 13:26:29,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 365 transitions, 5591 flow [2023-09-01 13:26:29,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 13:26:29,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 13:26:29,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1406 transitions. [2023-09-01 13:26:29,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2023-09-01 13:26:29,119 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1406 transitions. [2023-09-01 13:26:29,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1406 transitions. [2023-09-01 13:26:29,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:29,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1406 transitions. [2023-09-01 13:26:29,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 63.90909090909091) internal successors, (1406), 22 states have internal predecessors, (1406), 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 13:26:29,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 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 13:26:29,123 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 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 13:26:29,124 INFO L175 Difference]: Start difference. First operand has 253 places, 303 transitions, 4207 flow. Second operand 22 states and 1406 transitions. [2023-09-01 13:26:29,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 365 transitions, 5591 flow [2023-09-01 13:26:29,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 365 transitions, 5266 flow, removed 44 selfloop flow, removed 17 redundant places. [2023-09-01 13:26:29,177 INFO L231 Difference]: Finished difference. Result has 247 places, 83 transitions, 878 flow [2023-09-01 13:26:29,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=3902, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=878, PETRI_PLACES=247, PETRI_TRANSITIONS=83} [2023-09-01 13:26:29,178 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 227 predicate places. [2023-09-01 13:26:29,178 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 83 transitions, 878 flow [2023-09-01 13:26:29,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.8) internal successors, (1236), 20 states have internal predecessors, (1236), 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 13:26:29,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:29,178 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:29,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:29,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-09-01 13:26:29,384 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:29,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:29,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1325551673, now seen corresponding path program 13 times [2023-09-01 13:26:29,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:29,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580613181] [2023-09-01 13:26:29,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:29,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:29,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:29,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580613181] [2023-09-01 13:26:29,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580613181] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:29,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182434497] [2023-09-01 13:26:29,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:26:29,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:29,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:29,541 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:29,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-09-01 13:26:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:29,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 13:26:29,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:29,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:26:29,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182434497] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:29,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:29,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-09-01 13:26:29,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526326579] [2023-09-01 13:26:29,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:29,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 13:26:29,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:29,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 13:26:29,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-09-01 13:26:30,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:26:30,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 83 transitions, 878 flow. Second operand has 22 states, 22 states have (on average 61.59090909090909) internal successors, (1355), 22 states have internal predecessors, (1355), 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 13:26:30,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:30,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:26:30,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:30,481 INFO L130 PetriNetUnfolder]: 141/308 cut-off events. [2023-09-01 13:26:30,481 INFO L131 PetriNetUnfolder]: For 2336/2336 co-relation queries the response was YES. [2023-09-01 13:26:30,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1945 conditions, 308 events. 141/308 cut-off events. For 2336/2336 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1328 event pairs, 0 based on Foata normal form. 6/302 useless extension candidates. Maximal degree in co-relation 1887. Up to 185 conditions per place. [2023-09-01 13:26:30,482 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 57 selfloop transitions, 42 changer transitions 19/118 dead transitions. [2023-09-01 13:26:30,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 118 transitions, 1411 flow [2023-09-01 13:26:30,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 13:26:30,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 13:26:30,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1141 transitions. [2023-09-01 13:26:30,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41703216374269003 [2023-09-01 13:26:30,484 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1141 transitions. [2023-09-01 13:26:30,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1141 transitions. [2023-09-01 13:26:30,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:30,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1141 transitions. [2023-09-01 13:26:30,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 63.388888888888886) internal successors, (1141), 18 states have internal predecessors, (1141), 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 13:26:30,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 152.0) internal successors, (2888), 19 states have internal predecessors, (2888), 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 13:26:30,486 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 152.0) internal successors, (2888), 19 states have internal predecessors, (2888), 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 13:26:30,486 INFO L175 Difference]: Start difference. First operand has 247 places, 83 transitions, 878 flow. Second operand 18 states and 1141 transitions. [2023-09-01 13:26:30,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 118 transitions, 1411 flow [2023-09-01 13:26:30,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 118 transitions, 1085 flow, removed 77 selfloop flow, removed 38 redundant places. [2023-09-01 13:26:30,493 INFO L231 Difference]: Finished difference. Result has 125 places, 86 transitions, 731 flow [2023-09-01 13:26:30,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=731, PETRI_PLACES=125, PETRI_TRANSITIONS=86} [2023-09-01 13:26:30,493 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 105 predicate places. [2023-09-01 13:26:30,493 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 86 transitions, 731 flow [2023-09-01 13:26:30,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.59090909090909) internal successors, (1355), 22 states have internal predecessors, (1355), 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 13:26:30,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:30,494 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:30,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-09-01 13:26:30,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-09-01 13:26:30,694 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:26:30,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:30,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1359978278, now seen corresponding path program 14 times [2023-09-01 13:26:30,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:30,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594031567] [2023-09-01 13:26:30,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:30,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:26:30,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:30,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594031567] [2023-09-01 13:26:30,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594031567] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:30,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158508354] [2023-09-01 13:26:30,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:26:30,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:30,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:30,819 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:30,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-09-01 13:26:30,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:26:30,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:30,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 13:26:30,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:31,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:31,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:31,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:26:31,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158508354] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:31,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:31,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 18 [2023-09-01 13:26:31,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92291852] [2023-09-01 13:26:31,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:31,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 13:26:31,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:31,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 13:26:31,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-09-01 13:26:31,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-09-01 13:26:31,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 86 transitions, 731 flow. Second operand has 20 states, 20 states have (on average 61.7) internal successors, (1234), 20 states have internal predecessors, (1234), 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 13:26:31,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:31,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-09-01 13:26:31,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:31,534 INFO L130 PetriNetUnfolder]: 133/259 cut-off events. [2023-09-01 13:26:31,534 INFO L131 PetriNetUnfolder]: For 502/502 co-relation queries the response was YES. [2023-09-01 13:26:31,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1398 conditions, 259 events. 133/259 cut-off events. For 502/502 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 952 event pairs, 0 based on Foata normal form. 3/258 useless extension candidates. Maximal degree in co-relation 1358. Up to 99 conditions per place. [2023-09-01 13:26:31,535 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 0 selfloop transitions, 0 changer transitions 114/114 dead transitions. [2023-09-01 13:26:31,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 114 transitions, 1142 flow [2023-09-01 13:26:31,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 13:26:31,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 13:26:31,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1008 transitions. [2023-09-01 13:26:31,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4144736842105263 [2023-09-01 13:26:31,536 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1008 transitions. [2023-09-01 13:26:31,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1008 transitions. [2023-09-01 13:26:31,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:31,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1008 transitions. [2023-09-01 13:26:31,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 63.0) internal successors, (1008), 16 states have internal predecessors, (1008), 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 13:26:31,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 152.0) internal successors, (2584), 17 states have internal predecessors, (2584), 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 13:26:31,538 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 152.0) internal successors, (2584), 17 states have internal predecessors, (2584), 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 13:26:31,538 INFO L175 Difference]: Start difference. First operand has 125 places, 86 transitions, 731 flow. Second operand 16 states and 1008 transitions. [2023-09-01 13:26:31,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 114 transitions, 1142 flow [2023-09-01 13:26:31,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 114 transitions, 1038 flow, removed 13 selfloop flow, removed 16 redundant places. [2023-09-01 13:26:31,542 INFO L231 Difference]: Finished difference. Result has 114 places, 0 transitions, 0 flow [2023-09-01 13:26:31,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=0, PETRI_PLACES=114, PETRI_TRANSITIONS=0} [2023-09-01 13:26:31,542 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 94 predicate places. [2023-09-01 13:26:31,542 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 0 transitions, 0 flow [2023-09-01 13:26:31,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.7) internal successors, (1234), 20 states have internal predecessors, (1234), 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 13:26:31,545 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-09-01 13:26:31,545 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-09-01 13:26:31,545 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-09-01 13:26:31,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-09-01 13:26:31,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-09-01 13:26:31,750 INFO L445 BasicCegarLoop]: Path program histogram: [20, 14, 6] [2023-09-01 13:26:31,752 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-09-01 13:26:31,752 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-09-01 13:26:31,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.09 01:26:31 BasicIcfg [2023-09-01 13:26:31,755 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-09-01 13:26:31,755 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-09-01 13:26:31,755 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-09-01 13:26:31,755 INFO L275 PluginConnector]: Witness Printer initialized [2023-09-01 13:26:31,756 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:25:25" (3/4) ... [2023-09-01 13:26:31,758 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-09-01 13:26:31,763 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-09-01 13:26:31,763 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-09-01 13:26:31,766 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2023-09-01 13:26:31,766 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-09-01 13:26:31,766 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-09-01 13:26:31,766 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-09-01 13:26:31,795 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-09-01 13:26:31,795 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-09-01 13:26:31,795 INFO L158 Benchmark]: Toolchain (without parser) took 67530.90ms. Allocated memory was 81.8MB in the beginning and 373.3MB in the end (delta: 291.5MB). Free memory was 61.6MB in the beginning and 330.4MB in the end (delta: -268.8MB). Peak memory consumption was 22.6MB. Max. memory is 16.1GB. [2023-09-01 13:26:31,796 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 62.9MB. Free memory is still 40.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 13:26:31,797 INFO L158 Benchmark]: CACSL2BoogieTranslator took 227.99ms. Allocated memory is still 81.8MB. Free memory was 61.3MB in the beginning and 50.5MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 13:26:31,797 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.38ms. Allocated memory is still 81.8MB. Free memory was 50.3MB in the beginning and 48.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 13:26:31,797 INFO L158 Benchmark]: Boogie Preprocessor took 42.31ms. Allocated memory is still 81.8MB. Free memory was 48.7MB in the beginning and 47.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 13:26:31,798 INFO L158 Benchmark]: RCFGBuilder took 491.46ms. Allocated memory is still 81.8MB. Free memory was 47.5MB in the beginning and 54.6MB in the end (delta: -7.0MB). Peak memory consumption was 10.4MB. Max. memory is 16.1GB. [2023-09-01 13:26:31,798 INFO L158 Benchmark]: TraceAbstraction took 66681.67ms. Allocated memory was 81.8MB in the beginning and 373.3MB in the end (delta: 291.5MB). Free memory was 53.8MB in the beginning and 333.3MB in the end (delta: -279.5MB). Peak memory consumption was 221.9MB. Max. memory is 16.1GB. [2023-09-01 13:26:31,798 INFO L158 Benchmark]: Witness Printer took 40.04ms. Allocated memory is still 373.3MB. Free memory was 333.3MB in the beginning and 330.4MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 13:26:31,799 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 62.9MB. Free memory is still 40.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 227.99ms. Allocated memory is still 81.8MB. Free memory was 61.3MB in the beginning and 50.5MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.38ms. Allocated memory is still 81.8MB. Free memory was 50.3MB in the beginning and 48.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.31ms. Allocated memory is still 81.8MB. Free memory was 48.7MB in the beginning and 47.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 491.46ms. Allocated memory is still 81.8MB. Free memory was 47.5MB in the beginning and 54.6MB in the end (delta: -7.0MB). Peak memory consumption was 10.4MB. Max. memory is 16.1GB. * TraceAbstraction took 66681.67ms. Allocated memory was 81.8MB in the beginning and 373.3MB in the end (delta: 291.5MB). Free memory was 53.8MB in the beginning and 333.3MB in the end (delta: -279.5MB). Peak memory consumption was 221.9MB. Max. memory is 16.1GB. * Witness Printer took 40.04ms. Allocated memory is still 373.3MB. Free memory was 333.3MB in the beginning and 330.4MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 75 PlacesBefore, 20 PlacesAfterwards, 74 TransitionsBefore, 15 TransitionsAfterwards, 500 CoEnabledTransitionPairs, 6 FixpointIterations, 37 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 68 TotalNumberOfCompositions, 559 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 539, independent: 535, independent conditional: 0, independent unconditional: 535, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 279, independent: 277, independent conditional: 0, independent unconditional: 277, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 539, independent: 258, independent conditional: 0, independent unconditional: 258, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 279, unknown conditional: 0, unknown unconditional: 279] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 76]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 99 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 66.5s, OverallIterations: 40, TraceHistogramMax: 4, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 36.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9038 SdHoareTripleChecker+Valid, 15.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8567 mSDsluCounter, 3670 SdHoareTripleChecker+Invalid, 12.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3493 mSDsCounter, 975 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 35590 IncrementalHoareTripleChecker+Invalid, 36565 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 975 mSolverCounterUnsat, 177 mSDtfsCounter, 35590 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1942 GetRequests, 544 SyntacticMatches, 51 SemanticMatches, 1347 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16179 ImplicationChecksByTransitivity, 22.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4207occurred in iteration=37, InterpolantAutomatonStates: 909, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 17.6s InterpolantComputationTime, 1140 NumberOfCodeBlocks, 1140 NumberOfCodeBlocksAsserted, 110 NumberOfCheckSat, 1563 ConstructedInterpolants, 0 QuantifiedInterpolants, 19719 SizeOfPredicates, 138 NumberOfNonLiveVariables, 4304 ConjunctsInSsa, 879 ConjunctsInUnsatCore, 108 InterpolantComputations, 6 PerfectInterpolantSequences, 23/438 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-09-01 13:26:31,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE