./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-cond-3.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/unroll-cond-3.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 95e3bac7f28ae020b684175cea363a5866905518c289fbd40a07a7a3764acade --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 15:00:35,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 15:00:35,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 15:00:35,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 15:00:35,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 15:00:35,429 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 15:00:35,431 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 15:00:35,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 15:00:35,435 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 15:00:35,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 15:00:35,440 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 15:00:35,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 15:00:35,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 15:00:35,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 15:00:35,446 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 15:00:35,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 15:00:35,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 15:00:35,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 15:00:35,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 15:00:35,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 15:00:35,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 15:00:35,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 15:00:35,467 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 15:00:35,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 15:00:35,474 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 15:00:35,474 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 15:00:35,474 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 15:00:35,476 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 15:00:35,477 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 15:00:35,477 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 15:00:35,478 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 15:00:35,484 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 15:00:35,485 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 15:00:35,486 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 15:00:35,487 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 15:00:35,487 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 15:00:35,488 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 15:00:35,488 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 15:00:35,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 15:00:35,489 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 15:00:35,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 15:00:35,491 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 15:00:35,513 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 15:00:35,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 15:00:35,513 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 15:00:35,514 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 15:00:35,514 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 15:00:35,514 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 15:00:35,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 15:00:35,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 15:00:35,515 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 15:00:35,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 15:00:35,515 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 15:00:35,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 15:00:35,515 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 15:00:35,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 15:00:35,516 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 15:00:35,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 15:00:35,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 15:00:35,516 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 15:00:35,516 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 15:00:35,516 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 15:00:35,516 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 15:00:35,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 15:00:35,517 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 15:00:35,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 15:00:35,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 15:00:35,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 15:00:35,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 15:00:35,517 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 15:00:35,517 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 15:00:35,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 15:00:35,518 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 15:00:35,518 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 15:00:35,518 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 15:00:35,518 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 15:00:35,518 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 15:00:35,518 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95e3bac7f28ae020b684175cea363a5866905518c289fbd40a07a7a3764acade Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 15:00:35,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 15:00:35,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 15:00:35,808 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 15:00:35,809 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 15:00:35,809 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 15:00:35,810 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-3.wvr.c [2023-09-01 15:00:37,045 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 15:00:37,286 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 15:00:37,286 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-3.wvr.c [2023-09-01 15:00:37,291 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d74b5bee4/23e922150fd14e8c8dc739ae743fb862/FLAG8836988cd [2023-09-01 15:00:37,307 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d74b5bee4/23e922150fd14e8c8dc739ae743fb862 [2023-09-01 15:00:37,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 15:00:37,310 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 15:00:37,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 15:00:37,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 15:00:37,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 15:00:37,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:00:37" (1/1) ... [2023-09-01 15:00:37,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ab82500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:37, skipping insertion in model container [2023-09-01 15:00:37,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:00:37" (1/1) ... [2023-09-01 15:00:37,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 15:00:37,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 15:00:37,475 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/unroll-cond-3.wvr.c[2641,2654] [2023-09-01 15:00:37,482 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 15:00:37,490 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 15:00:37,509 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/unroll-cond-3.wvr.c[2641,2654] [2023-09-01 15:00:37,512 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 15:00:37,524 INFO L208 MainTranslator]: Completed translation [2023-09-01 15:00:37,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:37 WrapperNode [2023-09-01 15:00:37,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 15:00:37,525 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 15:00:37,526 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 15:00:37,526 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 15:00:37,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:37" (1/1) ... [2023-09-01 15:00:37,548 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:37" (1/1) ... [2023-09-01 15:00:37,568 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 165 [2023-09-01 15:00:37,569 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 15:00:37,570 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 15:00:37,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 15:00:37,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 15:00:37,576 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:37" (1/1) ... [2023-09-01 15:00:37,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:37" (1/1) ... [2023-09-01 15:00:37,579 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:37" (1/1) ... [2023-09-01 15:00:37,579 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:37" (1/1) ... [2023-09-01 15:00:37,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:37" (1/1) ... [2023-09-01 15:00:37,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:37" (1/1) ... [2023-09-01 15:00:37,589 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:37" (1/1) ... [2023-09-01 15:00:37,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:37" (1/1) ... [2023-09-01 15:00:37,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 15:00:37,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 15:00:37,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 15:00:37,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 15:00:37,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:37" (1/1) ... [2023-09-01 15:00:37,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 15:00:37,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:00:37,625 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 15:00:37,634 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 15:00:37,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 15:00:37,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 15:00:37,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 15:00:37,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 15:00:37,655 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 15:00:37,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 15:00:37,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 15:00:37,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 15:00:37,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 15:00:37,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 15:00:37,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 15:00:37,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 15:00:37,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 15:00:37,657 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 15:00:37,786 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 15:00:37,788 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 15:00:38,034 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 15:00:38,041 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 15:00:38,042 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 15:00:38,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:00:38 BoogieIcfgContainer [2023-09-01 15:00:38,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 15:00:38,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 15:00:38,046 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 15:00:38,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 15:00:38,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:00:37" (1/3) ... [2023-09-01 15:00:38,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@223f5560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:00:38, skipping insertion in model container [2023-09-01 15:00:38,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:37" (2/3) ... [2023-09-01 15:00:38,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@223f5560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:00:38, skipping insertion in model container [2023-09-01 15:00:38,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:00:38" (3/3) ... [2023-09-01 15:00:38,051 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2023-09-01 15:00:38,057 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 15:00:38,065 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 15:00:38,066 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 15:00:38,066 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 15:00:38,205 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 15:00:38,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 194 transitions, 404 flow [2023-09-01 15:00:38,349 INFO L130 PetriNetUnfolder]: 18/192 cut-off events. [2023-09-01 15:00:38,350 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 15:00:38,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 192 events. 18/192 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 300 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-09-01 15:00:38,356 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 194 transitions, 404 flow [2023-09-01 15:00:38,373 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 184 transitions, 380 flow [2023-09-01 15:00:38,377 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 15:00:38,396 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 184 transitions, 380 flow [2023-09-01 15:00:38,402 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 184 transitions, 380 flow [2023-09-01 15:00:38,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 184 transitions, 380 flow [2023-09-01 15:00:38,451 INFO L130 PetriNetUnfolder]: 18/184 cut-off events. [2023-09-01 15:00:38,452 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 15:00:38,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 184 events. 18/184 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 281 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-09-01 15:00:38,456 INFO L119 LiptonReduction]: Number of co-enabled transitions 4092 [2023-09-01 15:00:43,979 INFO L134 LiptonReduction]: Checked pairs total: 4038 [2023-09-01 15:00:43,979 INFO L136 LiptonReduction]: Total number of compositions: 221 [2023-09-01 15:00:43,990 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 15:00:43,996 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;@74608ff7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 15:00:43,996 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 15:00:44,000 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-09-01 15:00:44,000 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 15:00:44,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:00:44,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:00:44,002 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 15:00:44,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:00:44,005 INFO L85 PathProgramCache]: Analyzing trace with hash -562838425, now seen corresponding path program 1 times [2023-09-01 15:00:44,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:00:44,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917322097] [2023-09-01 15:00:44,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:00:44,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:00:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:00:44,366 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 15:00:44,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:00:44,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917322097] [2023-09-01 15:00:44,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917322097] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:00:44,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:00:44,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 15:00:44,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166218049] [2023-09-01 15:00:44,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:00:44,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 15:00:44,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:00:44,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 15:00:44,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 15:00:44,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 415 [2023-09-01 15:00:44,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:44,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:00:44,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 415 [2023-09-01 15:00:44,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:00:44,509 INFO L130 PetriNetUnfolder]: 49/84 cut-off events. [2023-09-01 15:00:44,510 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 15:00:44,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 84 events. 49/84 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 188 event pairs, 19 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 129. Up to 81 conditions per place. [2023-09-01 15:00:44,512 INFO L137 encePairwiseOnDemand]: 412/415 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-09-01 15:00:44,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-09-01 15:00:44,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 15:00:44,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 15:00:44,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2023-09-01 15:00:44,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42811244979919677 [2023-09-01 15:00:44,527 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2023-09-01 15:00:44,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2023-09-01 15:00:44,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:00:44,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2023-09-01 15:00:44,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:44,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 415.0) internal successors, (1660), 4 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:44,540 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 415.0) internal successors, (1660), 4 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:44,542 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 533 transitions. [2023-09-01 15:00:44,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-09-01 15:00:44,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 15:00:44,546 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-09-01 15:00:44,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-09-01 15:00:44,550 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-09-01 15:00:44,550 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-09-01 15:00:44,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:44,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:00:44,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:00:44,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 15:00:44,552 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 15:00:44,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:00:44,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1112897671, now seen corresponding path program 1 times [2023-09-01 15:00:44,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:00:44,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390858039] [2023-09-01 15:00:44,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:00:44,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:00:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:00:44,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:00:44,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:00:44,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390858039] [2023-09-01 15:00:44,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390858039] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:00:44,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:00:44,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 15:00:44,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621526065] [2023-09-01 15:00:44,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:00:44,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 15:00:44,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:00:44,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 15:00:44,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 15:00:45,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 415 [2023-09-01 15:00:45,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 164.0) internal successors, (820), 5 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:45,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:00:45,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 415 [2023-09-01 15:00:45,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:00:45,110 INFO L130 PetriNetUnfolder]: 72/135 cut-off events. [2023-09-01 15:00:45,111 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 15:00:45,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 135 events. 72/135 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 367 event pairs, 24 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 274. Up to 77 conditions per place. [2023-09-01 15:00:45,112 INFO L137 encePairwiseOnDemand]: 409/415 looper letters, 35 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-09-01 15:00:45,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 179 flow [2023-09-01 15:00:45,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 15:00:45,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 15:00:45,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 845 transitions. [2023-09-01 15:00:45,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4072289156626506 [2023-09-01 15:00:45,116 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 845 transitions. [2023-09-01 15:00:45,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 845 transitions. [2023-09-01 15:00:45,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:00:45,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 845 transitions. [2023-09-01 15:00:45,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:45,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 415.0) internal successors, (2490), 6 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:45,124 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 415.0) internal successors, (2490), 6 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:45,124 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 845 transitions. [2023-09-01 15:00:45,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 179 flow [2023-09-01 15:00:45,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 175 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 15:00:45,125 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2023-09-01 15:00:45,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-09-01 15:00:45,126 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-09-01 15:00:45,126 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2023-09-01 15:00:45,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 164.0) internal successors, (820), 5 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:45,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:00:45,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:00:45,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 15:00:45,128 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 15:00:45,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:00:45,128 INFO L85 PathProgramCache]: Analyzing trace with hash -387576613, now seen corresponding path program 2 times [2023-09-01 15:00:45,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:00:45,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345148491] [2023-09-01 15:00:45,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:00:45,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:00:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:00:45,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:00:45,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:00:45,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345148491] [2023-09-01 15:00:45,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345148491] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:00:45,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:00:45,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 15:00:45,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820604367] [2023-09-01 15:00:45,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:00:45,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 15:00:45,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:00:45,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 15:00:45,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 15:00:45,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 415 [2023-09-01 15:00:45,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:45,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:00:45,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 415 [2023-09-01 15:00:45,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:00:45,538 INFO L130 PetriNetUnfolder]: 111/208 cut-off events. [2023-09-01 15:00:45,538 INFO L131 PetriNetUnfolder]: For 115/115 co-relation queries the response was YES. [2023-09-01 15:00:45,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 208 events. 111/208 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 662 event pairs, 42 based on Foata normal form. 2/169 useless extension candidates. Maximal degree in co-relation 584. Up to 133 conditions per place. [2023-09-01 15:00:45,540 INFO L137 encePairwiseOnDemand]: 409/415 looper letters, 37 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2023-09-01 15:00:45,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 44 transitions, 252 flow [2023-09-01 15:00:45,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 15:00:45,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 15:00:45,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 856 transitions. [2023-09-01 15:00:45,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125301204819277 [2023-09-01 15:00:45,548 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 856 transitions. [2023-09-01 15:00:45,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 856 transitions. [2023-09-01 15:00:45,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:00:45,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 856 transitions. [2023-09-01 15:00:45,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 171.2) internal successors, (856), 5 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:45,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 415.0) internal successors, (2490), 6 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:45,555 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 415.0) internal successors, (2490), 6 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:45,555 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 5 states and 856 transitions. [2023-09-01 15:00:45,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 44 transitions, 252 flow [2023-09-01 15:00:45,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 44 transitions, 235 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-09-01 15:00:45,558 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 124 flow [2023-09-01 15:00:45,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-09-01 15:00:45,561 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2023-09-01 15:00:45,565 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 124 flow [2023-09-01 15:00:45,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:45,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:00:45,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:00:45,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 15:00:45,567 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 15:00:45,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:00:45,567 INFO L85 PathProgramCache]: Analyzing trace with hash 111746231, now seen corresponding path program 3 times [2023-09-01 15:00:45,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:00:45,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137912934] [2023-09-01 15:00:45,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:00:45,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:00:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:00:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:00:45,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:00:45,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137912934] [2023-09-01 15:00:45,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137912934] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:00:45,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:00:45,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 15:00:45,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371699706] [2023-09-01 15:00:45,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:00:45,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 15:00:45,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:00:45,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 15:00:45,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 15:00:45,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 415 [2023-09-01 15:00:45,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 165.0) internal successors, (825), 5 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:45,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:00:45,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 415 [2023-09-01 15:00:45,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:00:46,017 INFO L130 PetriNetUnfolder]: 121/224 cut-off events. [2023-09-01 15:00:46,018 INFO L131 PetriNetUnfolder]: For 317/317 co-relation queries the response was YES. [2023-09-01 15:00:46,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 785 conditions, 224 events. 121/224 cut-off events. For 317/317 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 744 event pairs, 44 based on Foata normal form. 4/201 useless extension candidates. Maximal degree in co-relation 764. Up to 121 conditions per place. [2023-09-01 15:00:46,020 INFO L137 encePairwiseOnDemand]: 409/415 looper letters, 37 selfloop transitions, 12 changer transitions 0/49 dead transitions. [2023-09-01 15:00:46,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 49 transitions, 321 flow [2023-09-01 15:00:46,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 15:00:46,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 15:00:46,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 851 transitions. [2023-09-01 15:00:46,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41012048192771083 [2023-09-01 15:00:46,027 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 851 transitions. [2023-09-01 15:00:46,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 851 transitions. [2023-09-01 15:00:46,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:00:46,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 851 transitions. [2023-09-01 15:00:46,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 170.2) internal successors, (851), 5 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 15:00:46,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 415.0) internal successors, (2490), 6 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:46,038 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 415.0) internal successors, (2490), 6 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:46,038 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 124 flow. Second operand 5 states and 851 transitions. [2023-09-01 15:00:46,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 49 transitions, 321 flow [2023-09-01 15:00:46,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 49 transitions, 297 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-09-01 15:00:46,044 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 203 flow [2023-09-01 15:00:46,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=203, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2023-09-01 15:00:46,045 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 17 predicate places. [2023-09-01 15:00:46,045 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 203 flow [2023-09-01 15:00:46,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 165.0) internal successors, (825), 5 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:46,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:00:46,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:00:46,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 15:00:46,046 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 15:00:46,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:00:46,047 INFO L85 PathProgramCache]: Analyzing trace with hash 664116733, now seen corresponding path program 4 times [2023-09-01 15:00:46,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:00:46,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979801833] [2023-09-01 15:00:46,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:00:46,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:00:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:00:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:00:46,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:00:46,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979801833] [2023-09-01 15:00:46,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979801833] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:00:46,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:00:46,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 15:00:46,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479917232] [2023-09-01 15:00:46,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:00:46,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 15:00:46,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:00:46,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 15:00:46,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 15:00:46,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 415 [2023-09-01 15:00:46,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 203 flow. Second operand has 5 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:46,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:00:46,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 415 [2023-09-01 15:00:46,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:00:46,429 INFO L130 PetriNetUnfolder]: 117/220 cut-off events. [2023-09-01 15:00:46,429 INFO L131 PetriNetUnfolder]: For 530/530 co-relation queries the response was YES. [2023-09-01 15:00:46,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 848 conditions, 220 events. 117/220 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 720 event pairs, 50 based on Foata normal form. 4/197 useless extension candidates. Maximal degree in co-relation 824. Up to 177 conditions per place. [2023-09-01 15:00:46,431 INFO L137 encePairwiseOnDemand]: 409/415 looper letters, 32 selfloop transitions, 15 changer transitions 0/47 dead transitions. [2023-09-01 15:00:46,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 375 flow [2023-09-01 15:00:46,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 15:00:46,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 15:00:46,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 835 transitions. [2023-09-01 15:00:46,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40240963855421685 [2023-09-01 15:00:46,439 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 835 transitions. [2023-09-01 15:00:46,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 835 transitions. [2023-09-01 15:00:46,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:00:46,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 835 transitions. [2023-09-01 15:00:46,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:46,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 415.0) internal successors, (2490), 6 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:46,447 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 415.0) internal successors, (2490), 6 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:46,447 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 203 flow. Second operand 5 states and 835 transitions. [2023-09-01 15:00:46,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 375 flow [2023-09-01 15:00:46,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 362 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 15:00:46,451 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 296 flow [2023-09-01 15:00:46,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-09-01 15:00:46,454 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-09-01 15:00:46,454 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 296 flow [2023-09-01 15:00:46,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:46,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:00:46,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:00:46,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 15:00:46,455 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 15:00:46,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:00:46,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1682708675, now seen corresponding path program 5 times [2023-09-01 15:00:46,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:00:46,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15715115] [2023-09-01 15:00:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:00:46,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:00:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:00:46,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:00:46,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:00:46,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15715115] [2023-09-01 15:00:46,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15715115] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:00:46,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:00:46,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 15:00:46,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291624528] [2023-09-01 15:00:46,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:00:46,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 15:00:46,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:00:46,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 15:00:46,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 15:00:46,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 415 [2023-09-01 15:00:46,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 296 flow. Second operand has 5 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:46,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:00:46,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 415 [2023-09-01 15:00:46,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:00:46,787 INFO L130 PetriNetUnfolder]: 118/223 cut-off events. [2023-09-01 15:00:46,787 INFO L131 PetriNetUnfolder]: For 733/733 co-relation queries the response was YES. [2023-09-01 15:00:46,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 223 events. 118/223 cut-off events. For 733/733 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 742 event pairs, 38 based on Foata normal form. 2/198 useless extension candidates. Maximal degree in co-relation 934. Up to 123 conditions per place. [2023-09-01 15:00:46,789 INFO L137 encePairwiseOnDemand]: 409/415 looper letters, 38 selfloop transitions, 14 changer transitions 0/52 dead transitions. [2023-09-01 15:00:46,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 442 flow [2023-09-01 15:00:46,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 15:00:46,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 15:00:46,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 859 transitions. [2023-09-01 15:00:46,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41397590361445785 [2023-09-01 15:00:46,792 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 859 transitions. [2023-09-01 15:00:46,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 859 transitions. [2023-09-01 15:00:46,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:00:46,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 859 transitions. [2023-09-01 15:00:46,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 171.8) internal successors, (859), 5 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:46,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 415.0) internal successors, (2490), 6 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:46,798 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 415.0) internal successors, (2490), 6 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:46,798 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 296 flow. Second operand 5 states and 859 transitions. [2023-09-01 15:00:46,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 442 flow [2023-09-01 15:00:46,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 388 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-09-01 15:00:46,801 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 282 flow [2023-09-01 15:00:46,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2023-09-01 15:00:46,802 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2023-09-01 15:00:46,802 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 282 flow [2023-09-01 15:00:46,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:46,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:00:46,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:00:46,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 15:00:46,804 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 15:00:46,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:00:46,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1368229791, now seen corresponding path program 6 times [2023-09-01 15:00:46,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:00:46,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434710387] [2023-09-01 15:00:46,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:00:46,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:00:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:00:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:00:46,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:00:46,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434710387] [2023-09-01 15:00:46,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434710387] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:00:46,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:00:46,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 15:00:46,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629063370] [2023-09-01 15:00:46,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:00:46,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 15:00:46,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:00:46,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 15:00:46,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 15:00:47,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 415 [2023-09-01 15:00:47,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:47,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:00:47,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 415 [2023-09-01 15:00:47,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:00:47,224 INFO L130 PetriNetUnfolder]: 117/216 cut-off events. [2023-09-01 15:00:47,225 INFO L131 PetriNetUnfolder]: For 679/679 co-relation queries the response was YES. [2023-09-01 15:00:47,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 897 conditions, 216 events. 117/216 cut-off events. For 679/679 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 703 event pairs, 49 based on Foata normal form. 2/191 useless extension candidates. Maximal degree in co-relation 870. Up to 170 conditions per place. [2023-09-01 15:00:47,227 INFO L137 encePairwiseOnDemand]: 409/415 looper letters, 34 selfloop transitions, 15 changer transitions 0/49 dead transitions. [2023-09-01 15:00:47,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 414 flow [2023-09-01 15:00:47,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 15:00:47,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 15:00:47,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 855 transitions. [2023-09-01 15:00:47,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41204819277108434 [2023-09-01 15:00:47,230 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 855 transitions. [2023-09-01 15:00:47,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 855 transitions. [2023-09-01 15:00:47,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:00:47,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 855 transitions. [2023-09-01 15:00:47,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:47,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 415.0) internal successors, (2490), 6 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:47,236 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 415.0) internal successors, (2490), 6 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:47,236 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 282 flow. Second operand 5 states and 855 transitions. [2023-09-01 15:00:47,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 414 flow [2023-09-01 15:00:47,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 380 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 15:00:47,239 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 294 flow [2023-09-01 15:00:47,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2023-09-01 15:00:47,240 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 27 predicate places. [2023-09-01 15:00:47,240 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 294 flow [2023-09-01 15:00:47,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:47,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:00:47,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:00:47,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 15:00:47,241 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 15:00:47,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:00:47,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1003719491, now seen corresponding path program 1 times [2023-09-01 15:00:47,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:00:47,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047648992] [2023-09-01 15:00:47,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:00:47,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:00:47,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:00:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:00:47,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:00:47,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047648992] [2023-09-01 15:00:47,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047648992] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:00:47,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712030719] [2023-09-01 15:00:47,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:00:47,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:00:47,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:00:47,465 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 15:00:47,474 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 15:00:47,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:00:47,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 15:00:47,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:00:48,189 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 15:00:48,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 168 [2023-09-01 15:00:48,369 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 15:00:48,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:00:49,497 INFO L321 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2023-09-01 15:00:49,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 45 [2023-09-01 15:00:49,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:00:49,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712030719] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:00:49,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:00:49,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 18 [2023-09-01 15:00:49,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101350536] [2023-09-01 15:00:49,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:00:49,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 15:00:49,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:00:49,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 15:00:49,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-09-01 15:00:51,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 415 [2023-09-01 15:00:51,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 294 flow. Second operand has 18 states, 18 states have (on average 139.16666666666666) internal successors, (2505), 18 states have internal predecessors, (2505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:51,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:00:51,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 415 [2023-09-01 15:00:51,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:00:54,954 INFO L130 PetriNetUnfolder]: 445/853 cut-off events. [2023-09-01 15:00:54,955 INFO L131 PetriNetUnfolder]: For 2069/2069 co-relation queries the response was YES. [2023-09-01 15:00:54,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3298 conditions, 853 events. 445/853 cut-off events. For 2069/2069 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4322 event pairs, 17 based on Foata normal form. 9/723 useless extension candidates. Maximal degree in co-relation 2803. Up to 261 conditions per place. [2023-09-01 15:00:54,965 INFO L137 encePairwiseOnDemand]: 403/415 looper letters, 140 selfloop transitions, 91 changer transitions 28/259 dead transitions. [2023-09-01 15:00:54,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 259 transitions, 1884 flow [2023-09-01 15:00:54,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 15:00:54,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 15:00:54,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4750 transitions. [2023-09-01 15:00:54,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3468419131069733 [2023-09-01 15:00:54,979 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4750 transitions. [2023-09-01 15:00:54,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4750 transitions. [2023-09-01 15:00:54,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:00:54,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4750 transitions. [2023-09-01 15:00:54,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 143.93939393939394) internal successors, (4750), 33 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:55,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 415.0) internal successors, (14110), 34 states have internal predecessors, (14110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:55,014 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 415.0) internal successors, (14110), 34 states have internal predecessors, (14110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:55,014 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 294 flow. Second operand 33 states and 4750 transitions. [2023-09-01 15:00:55,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 259 transitions, 1884 flow [2023-09-01 15:00:55,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 259 transitions, 1776 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-09-01 15:00:55,027 INFO L231 Difference]: Finished difference. Result has 95 places, 125 transitions, 1210 flow [2023-09-01 15:00:55,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1210, PETRI_PLACES=95, PETRI_TRANSITIONS=125} [2023-09-01 15:00:55,029 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 74 predicate places. [2023-09-01 15:00:55,030 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 125 transitions, 1210 flow [2023-09-01 15:00:55,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 139.16666666666666) internal successors, (2505), 18 states have internal predecessors, (2505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:55,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:00:55,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:00:55,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 15:00:55,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:00:55,241 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 15:00:55,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:00:55,241 INFO L85 PathProgramCache]: Analyzing trace with hash -763425186, now seen corresponding path program 1 times [2023-09-01 15:00:55,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:00:55,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748891661] [2023-09-01 15:00:55,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:00:55,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:00:55,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:00:55,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:00:55,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:00:55,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748891661] [2023-09-01 15:00:55,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748891661] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:00:55,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195684046] [2023-09-01 15:00:55,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:00:55,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:00:55,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:00:55,509 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 15:00:55,533 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 15:00:55,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:00:55,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 48 conjunts are in the unsatisfiable core [2023-09-01 15:00:55,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:00:55,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 15:00:55,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 15:00:55,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 15:00:56,262 INFO L321 Elim1Store]: treesize reduction 74, result has 14.9 percent of original size [2023-09-01 15:00:56,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 301 treesize of output 212 [2023-09-01 15:00:56,361 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 15:00:56,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:01:02,181 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:01:02,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 250 treesize of output 154 [2023-09-01 15:01:02,207 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:01:02,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 934 treesize of output 838 [2023-09-01 15:01:02,257 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:01:02,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 209 treesize of output 149 [2023-09-01 15:01:02,620 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:01:02,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 154 [2023-09-01 15:01:03,622 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-09-01 15:01:03,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 438 treesize of output 1 [2023-09-01 15:01:03,688 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 15:01:03,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195684046] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:01:03,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:01:03,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 23 [2023-09-01 15:01:03,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520445080] [2023-09-01 15:01:03,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:01:03,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 15:01:03,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:01:03,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 15:01:03,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=373, Unknown=12, NotChecked=0, Total=506 [2023-09-01 15:01:05,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:08,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:10,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:13,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:15,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:17,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:20,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:22,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:24,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:24,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 415 [2023-09-01 15:01:24,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 125 transitions, 1210 flow. Second operand has 23 states, 23 states have (on average 81.08695652173913) internal successors, (1865), 23 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:24,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:01:24,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 415 [2023-09-01 15:01:24,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:01:25,117 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* c_~x2~0 4) c_~f~0.offset))) (and (forall ((v_ArrVal_167 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_167) c_~f~0.base))) (let ((.cse1 (select .cse2 .cse3))) (let ((.cse0 (select .cse2 (+ c_~f~0.offset (* .cse1 4))))) (or (< .cse0 0) (< .cse1 0) (= c_~x1~0 (select .cse2 (+ (* .cse0 4) c_~f~0.offset))) (<= c_~size~0 .cse0) (<= c_~size~0 .cse1)))))) (let ((.cse7 (select |c_#memory_int| c_~f~0.base))) (let ((.cse4 (select .cse7 .cse3))) (let ((.cse5 (select .cse7 (+ (* .cse4 4) c_~f~0.offset)))) (or (< .cse4 0) (< .cse5 0) (let ((.cse6 (select .cse7 (+ c_~f~0.offset (* 4 .cse5))))) (and (or (< .cse6 0) (= c_~x1~0 (select .cse7 (+ c_~f~0.offset (* .cse6 4)))) (<= c_~size~0 .cse6)) (= .cse6 c_~x1~0))) (<= c_~size~0 .cse5) (<= c_~size~0 .cse4))))) (forall ((v_ArrVal_167 (Array Int Int))) (let ((.cse11 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_167) c_~f~0.base))) (let ((.cse9 (select .cse11 .cse3))) (let ((.cse8 (select .cse11 (+ c_~f~0.offset (* .cse9 4))))) (let ((.cse10 (select .cse11 (+ (* .cse8 4) c_~f~0.offset)))) (or (< .cse8 0) (< .cse9 0) (< .cse10 0) (<= c_~size~0 .cse8) (= c_~x1~0 (select .cse11 (+ (* .cse10 4) c_~f~0.offset))) (<= c_~size~0 .cse10) (<= c_~size~0 .cse9))))))))) is different from false [2023-09-01 15:01:33,732 WARN L222 SmtUtils]: Spent 6.15s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:01:35,107 INFO L130 PetriNetUnfolder]: 702/1317 cut-off events. [2023-09-01 15:01:35,107 INFO L131 PetriNetUnfolder]: For 7881/7881 co-relation queries the response was YES. [2023-09-01 15:01:35,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6782 conditions, 1317 events. 702/1317 cut-off events. For 7881/7881 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 7362 event pairs, 61 based on Foata normal form. 13/1328 useless extension candidates. Maximal degree in co-relation 6520. Up to 451 conditions per place. [2023-09-01 15:01:35,119 INFO L137 encePairwiseOnDemand]: 402/415 looper letters, 124 selfloop transitions, 125 changer transitions 42/291 dead transitions. [2023-09-01 15:01:35,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 291 transitions, 2957 flow [2023-09-01 15:01:35,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 15:01:35,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 15:01:35,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2551 transitions. [2023-09-01 15:01:35,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2048995983935743 [2023-09-01 15:01:35,128 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2551 transitions. [2023-09-01 15:01:35,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2551 transitions. [2023-09-01 15:01:35,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:01:35,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2551 transitions. [2023-09-01 15:01:35,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 85.03333333333333) internal successors, (2551), 30 states have internal predecessors, (2551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:35,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 415.0) internal successors, (12865), 31 states have internal predecessors, (12865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:35,162 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 415.0) internal successors, (12865), 31 states have internal predecessors, (12865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:35,162 INFO L175 Difference]: Start difference. First operand has 95 places, 125 transitions, 1210 flow. Second operand 30 states and 2551 transitions. [2023-09-01 15:01:35,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 291 transitions, 2957 flow [2023-09-01 15:01:35,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 291 transitions, 2609 flow, removed 151 selfloop flow, removed 7 redundant places. [2023-09-01 15:01:35,200 INFO L231 Difference]: Finished difference. Result has 122 places, 174 transitions, 1829 flow [2023-09-01 15:01:35,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1829, PETRI_PLACES=122, PETRI_TRANSITIONS=174} [2023-09-01 15:01:35,201 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 101 predicate places. [2023-09-01 15:01:35,201 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 174 transitions, 1829 flow [2023-09-01 15:01:35,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 81.08695652173913) internal successors, (1865), 23 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:35,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:01:35,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:01:35,207 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 15:01:35,405 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,SelfDestructingSolverStorable8 [2023-09-01 15:01:35,405 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 15:01:35,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:01:35,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1184608103, now seen corresponding path program 2 times [2023-09-01 15:01:35,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:01:35,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473829835] [2023-09-01 15:01:35,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:01:35,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:01:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:01:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:01:35,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:01:35,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473829835] [2023-09-01 15:01:35,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473829835] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:01:35,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865947297] [2023-09-01 15:01:35,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 15:01:35,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:01:35,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:01:35,617 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 15:01:35,646 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 15:01:35,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 15:01:35,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:01:35,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 15:01:35,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:01:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:01:35,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:01:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:01:35,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865947297] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:01:35,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:01:35,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 15:01:35,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666504054] [2023-09-01 15:01:35,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:01:35,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 15:01:35,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:01:35,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 15:01:35,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-09-01 15:01:36,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 415 [2023-09-01 15:01:36,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 174 transitions, 1829 flow. Second operand has 12 states, 12 states have (on average 160.33333333333334) internal successors, (1924), 12 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:36,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:01:36,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 415 [2023-09-01 15:01:36,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:01:36,734 INFO L130 PetriNetUnfolder]: 722/1367 cut-off events. [2023-09-01 15:01:36,734 INFO L131 PetriNetUnfolder]: For 10183/10183 co-relation queries the response was YES. [2023-09-01 15:01:36,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7887 conditions, 1367 events. 722/1367 cut-off events. For 10183/10183 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 7787 event pairs, 228 based on Foata normal form. 30/1396 useless extension candidates. Maximal degree in co-relation 7299. Up to 1123 conditions per place. [2023-09-01 15:01:36,748 INFO L137 encePairwiseOnDemand]: 409/415 looper letters, 169 selfloop transitions, 70 changer transitions 5/244 dead transitions. [2023-09-01 15:01:36,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 244 transitions, 2955 flow [2023-09-01 15:01:36,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 15:01:36,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 15:01:36,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1812 transitions. [2023-09-01 15:01:36,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39693318729463306 [2023-09-01 15:01:36,755 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1812 transitions. [2023-09-01 15:01:36,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1812 transitions. [2023-09-01 15:01:36,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:01:36,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1812 transitions. [2023-09-01 15:01:36,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 164.72727272727272) internal successors, (1812), 11 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:36,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 415.0) internal successors, (4980), 12 states have internal predecessors, (4980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:36,765 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 415.0) internal successors, (4980), 12 states have internal predecessors, (4980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:36,766 INFO L175 Difference]: Start difference. First operand has 122 places, 174 transitions, 1829 flow. Second operand 11 states and 1812 transitions. [2023-09-01 15:01:36,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 244 transitions, 2955 flow [2023-09-01 15:01:36,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 244 transitions, 2626 flow, removed 113 selfloop flow, removed 12 redundant places. [2023-09-01 15:01:36,820 INFO L231 Difference]: Finished difference. Result has 121 places, 208 transitions, 2238 flow [2023-09-01 15:01:36,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=1606, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2238, PETRI_PLACES=121, PETRI_TRANSITIONS=208} [2023-09-01 15:01:36,821 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 100 predicate places. [2023-09-01 15:01:36,822 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 208 transitions, 2238 flow [2023-09-01 15:01:36,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 160.33333333333334) internal successors, (1924), 12 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:36,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:01:36,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:01:36,829 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 15:01:37,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:01:37,029 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 15:01:37,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:01:37,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1315904287, now seen corresponding path program 3 times [2023-09-01 15:01:37,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:01:37,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744280596] [2023-09-01 15:01:37,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:01:37,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:01:37,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:01:37,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:01:37,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:01:37,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744280596] [2023-09-01 15:01:37,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744280596] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:01:37,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002639926] [2023-09-01 15:01:37,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 15:01:37,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:01:37,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:01:37,243 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 15:01:37,245 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 15:01:37,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 15:01:37,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:01:37,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2023-09-01 15:01:37,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:01:37,703 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 15:01:37,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 168 [2023-09-01 15:01:37,807 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 15:01:37,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:01:38,471 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:01:38,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 148 [2023-09-01 15:02:00,055 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 15:02:00,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002639926] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:02:00,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:02:00,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-09-01 15:02:00,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181775942] [2023-09-01 15:02:00,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:02:00,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 15:02:00,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:02:00,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 15:02:00,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-09-01 15:02:01,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 415 [2023-09-01 15:02:01,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 208 transitions, 2238 flow. Second operand has 20 states, 20 states have (on average 138.4) internal successors, (2768), 20 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:01,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:02:01,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 415 [2023-09-01 15:02:01,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:02:04,645 INFO L130 PetriNetUnfolder]: 839/1568 cut-off events. [2023-09-01 15:02:04,646 INFO L131 PetriNetUnfolder]: For 11977/11977 co-relation queries the response was YES. [2023-09-01 15:02:04,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9101 conditions, 1568 events. 839/1568 cut-off events. For 11977/11977 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9033 event pairs, 149 based on Foata normal form. 12/1579 useless extension candidates. Maximal degree in co-relation 8954. Up to 1122 conditions per place. [2023-09-01 15:02:04,660 INFO L137 encePairwiseOnDemand]: 405/415 looper letters, 199 selfloop transitions, 88 changer transitions 11/298 dead transitions. [2023-09-01 15:02:04,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 298 transitions, 3550 flow [2023-09-01 15:02:04,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 15:02:04,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 15:02:04,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3390 transitions. [2023-09-01 15:02:04,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34036144578313254 [2023-09-01 15:02:04,666 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3390 transitions. [2023-09-01 15:02:04,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3390 transitions. [2023-09-01 15:02:04,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:02:04,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3390 transitions. [2023-09-01 15:02:04,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 141.25) internal successors, (3390), 24 states have internal predecessors, (3390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:04,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 415.0) internal successors, (10375), 25 states have internal predecessors, (10375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:04,682 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 415.0) internal successors, (10375), 25 states have internal predecessors, (10375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:04,682 INFO L175 Difference]: Start difference. First operand has 121 places, 208 transitions, 2238 flow. Second operand 24 states and 3390 transitions. [2023-09-01 15:02:04,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 298 transitions, 3550 flow [2023-09-01 15:02:04,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 298 transitions, 3351 flow, removed 93 selfloop flow, removed 2 redundant places. [2023-09-01 15:02:04,743 INFO L231 Difference]: Finished difference. Result has 146 places, 233 transitions, 2639 flow [2023-09-01 15:02:04,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=2097, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2639, PETRI_PLACES=146, PETRI_TRANSITIONS=233} [2023-09-01 15:02:04,744 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 125 predicate places. [2023-09-01 15:02:04,744 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 233 transitions, 2639 flow [2023-09-01 15:02:04,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 138.4) internal successors, (2768), 20 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:04,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:02:04,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:02:04,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 15:02:04,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:02:04,955 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 15:02:04,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:02:04,956 INFO L85 PathProgramCache]: Analyzing trace with hash 84161971, now seen corresponding path program 4 times [2023-09-01 15:02:04,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:02:04,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013925804] [2023-09-01 15:02:04,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:02:04,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:02:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:02:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:02:05,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:02:05,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013925804] [2023-09-01 15:02:05,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013925804] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:02:05,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566045462] [2023-09-01 15:02:05,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 15:02:05,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:02:05,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:02:05,155 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 15:02:05,186 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 15:02:05,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 15:02:05,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:02:05,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 15:02:05,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:02:05,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 15:02:05,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 15:02:05,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 15:02:05,699 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 15:02:05,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 168 [2023-09-01 15:02:05,825 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 15:02:05,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:02:41,739 WARN L222 SmtUtils]: Spent 8.23s on a formula simplification. DAG size of input: 777 DAG size of output: 719 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 15:03:16,055 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:03:16,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 92 [2023-09-01 15:03:16,074 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:03:16,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 540 treesize of output 500 [2023-09-01 15:03:16,104 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:03:16,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 104 [2023-09-01 15:03:16,326 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:03:16,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 101 [2023-09-01 15:03:16,455 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 15:03:16,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566045462] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:03:16,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:03:16,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-09-01 15:03:16,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347380989] [2023-09-01 15:03:16,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:03:16,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 15:03:16,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:03:16,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 15:03:16,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=361, Unknown=2, NotChecked=0, Total=462 [2023-09-01 15:03:18,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:03:21,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:03:23,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:03:25,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:03:28,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:03:30,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:03:30,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 415 [2023-09-01 15:03:30,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 233 transitions, 2639 flow. Second operand has 22 states, 22 states have (on average 101.18181818181819) internal successors, (2226), 22 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:30,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:03:30,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 415 [2023-09-01 15:03:30,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:03:44,997 WARN L222 SmtUtils]: Spent 10.18s on a formula simplification. DAG size of input: 70 DAG size of output: 42 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:03:47,605 INFO L130 PetriNetUnfolder]: 1128/2141 cut-off events. [2023-09-01 15:03:47,605 INFO L131 PetriNetUnfolder]: For 17581/17581 co-relation queries the response was YES. [2023-09-01 15:03:47,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12714 conditions, 2141 events. 1128/2141 cut-off events. For 17581/17581 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 13645 event pairs, 91 based on Foata normal form. 21/2161 useless extension candidates. Maximal degree in co-relation 12590. Up to 955 conditions per place. [2023-09-01 15:03:47,624 INFO L137 encePairwiseOnDemand]: 404/415 looper letters, 186 selfloop transitions, 192 changer transitions 28/406 dead transitions. [2023-09-01 15:03:47,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 406 transitions, 4986 flow [2023-09-01 15:03:47,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 15:03:47,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 15:03:47,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3054 transitions. [2023-09-01 15:03:47,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2537598670544246 [2023-09-01 15:03:47,629 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3054 transitions. [2023-09-01 15:03:47,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3054 transitions. [2023-09-01 15:03:47,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:03:47,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3054 transitions. [2023-09-01 15:03:47,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 105.3103448275862) internal successors, (3054), 29 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:47,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 415.0) internal successors, (12450), 30 states have internal predecessors, (12450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:47,643 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 415.0) internal successors, (12450), 30 states have internal predecessors, (12450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:47,643 INFO L175 Difference]: Start difference. First operand has 146 places, 233 transitions, 2639 flow. Second operand 29 states and 3054 transitions. [2023-09-01 15:03:47,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 406 transitions, 4986 flow [2023-09-01 15:03:47,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 406 transitions, 4885 flow, removed 7 selfloop flow, removed 15 redundant places. [2023-09-01 15:03:47,722 INFO L231 Difference]: Finished difference. Result has 169 places, 295 transitions, 3918 flow [2023-09-01 15:03:47,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=2526, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3918, PETRI_PLACES=169, PETRI_TRANSITIONS=295} [2023-09-01 15:03:47,723 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 148 predicate places. [2023-09-01 15:03:47,723 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 295 transitions, 3918 flow [2023-09-01 15:03:47,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 101.18181818181819) internal successors, (2226), 22 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:47,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:03:47,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:03:47,735 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 15:03:47,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-09-01 15:03:47,936 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 15:03:47,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:03:47,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1646219843, now seen corresponding path program 5 times [2023-09-01 15:03:47,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:03:47,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182656783] [2023-09-01 15:03:47,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:03:47,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:03:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:03:48,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:03:48,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:03:48,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182656783] [2023-09-01 15:03:48,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182656783] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:03:48,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141941964] [2023-09-01 15:03:48,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 15:03:48,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:03:48,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:03:48,157 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 15:03:48,176 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 15:03:48,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 15:03:48,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:03:48,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 15:03:48,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:03:48,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 15:03:48,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 15:03:48,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 15:03:48,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 15:03:48,680 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 15:03:48,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 168 [2023-09-01 15:03:48,764 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 15:03:48,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:03:49,530 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:03:49,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 89 [2023-09-01 15:03:49,549 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:03:49,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 808 treesize of output 688 [2023-09-01 15:03:49,584 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:03:49,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 144 treesize of output 148 [2023-09-01 15:03:49,599 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:03:49,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 81 [2023-09-01 15:03:50,196 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 15:03:50,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141941964] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:03:50,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:03:50,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-09-01 15:03:50,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517531273] [2023-09-01 15:03:50,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:03:50,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 15:03:50,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:03:50,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 15:03:50,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=378, Unknown=1, NotChecked=0, Total=462 [2023-09-01 15:03:52,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:03:54,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:03:57,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:03:59,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:03:59,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 415 [2023-09-01 15:03:59,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 295 transitions, 3918 flow. Second operand has 22 states, 22 states have (on average 101.18181818181819) internal successors, (2226), 22 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:59,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:03:59,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 415 [2023-09-01 15:03:59,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:04:18,642 WARN L222 SmtUtils]: Spent 18.23s on a formula simplification. DAG size of input: 47 DAG size of output: 45 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:04:39,202 INFO L130 PetriNetUnfolder]: 1234/2380 cut-off events. [2023-09-01 15:04:39,202 INFO L131 PetriNetUnfolder]: For 29067/29067 co-relation queries the response was YES. [2023-09-01 15:04:39,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15953 conditions, 2380 events. 1234/2380 cut-off events. For 29067/29067 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 15879 event pairs, 134 based on Foata normal form. 46/2425 useless extension candidates. Maximal degree in co-relation 15798. Up to 1118 conditions per place. [2023-09-01 15:04:39,221 INFO L137 encePairwiseOnDemand]: 404/415 looper letters, 134 selfloop transitions, 107 changer transitions 231/472 dead transitions. [2023-09-01 15:04:39,221 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 472 transitions, 6476 flow [2023-09-01 15:04:39,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 15:04:39,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 15:04:39,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3471 transitions. [2023-09-01 15:04:39,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2534501642935378 [2023-09-01 15:04:39,228 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3471 transitions. [2023-09-01 15:04:39,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3471 transitions. [2023-09-01 15:04:39,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:04:39,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3471 transitions. [2023-09-01 15:04:39,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 105.18181818181819) internal successors, (3471), 33 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:39,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 415.0) internal successors, (14110), 34 states have internal predecessors, (14110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:39,243 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 415.0) internal successors, (14110), 34 states have internal predecessors, (14110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:39,244 INFO L175 Difference]: Start difference. First operand has 169 places, 295 transitions, 3918 flow. Second operand 33 states and 3471 transitions. [2023-09-01 15:04:39,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 472 transitions, 6476 flow [2023-09-01 15:04:39,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 472 transitions, 6082 flow, removed 103 selfloop flow, removed 12 redundant places. [2023-09-01 15:04:39,399 INFO L231 Difference]: Finished difference. Result has 201 places, 165 transitions, 2211 flow [2023-09-01 15:04:39,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=3576, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2211, PETRI_PLACES=201, PETRI_TRANSITIONS=165} [2023-09-01 15:04:39,400 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 180 predicate places. [2023-09-01 15:04:39,400 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 165 transitions, 2211 flow [2023-09-01 15:04:39,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 101.18181818181819) internal successors, (2226), 22 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:39,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:04:39,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:04:39,409 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 15:04:39,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:04:39,606 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 15:04:39,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:04:39,607 INFO L85 PathProgramCache]: Analyzing trace with hash -858716135, now seen corresponding path program 6 times [2023-09-01 15:04:39,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:04:39,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5146549] [2023-09-01 15:04:39,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:04:39,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:04:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:04:39,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:04:39,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:04:39,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5146549] [2023-09-01 15:04:39,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5146549] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:04:39,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866414230] [2023-09-01 15:04:39,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 15:04:39,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:04:39,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:04:39,781 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 15:04:39,784 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 15:04:39,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 15:04:39,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:04:39,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 15:04:39,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:04:39,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:04:39,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:04:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:04:40,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866414230] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:04:40,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:04:40,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-09-01 15:04:40,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930898681] [2023-09-01 15:04:40,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:04:40,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 15:04:40,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:04:40,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 15:04:40,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-09-01 15:04:40,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 415 [2023-09-01 15:04:40,141 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 165 transitions, 2211 flow. Second operand has 11 states, 11 states have (on average 160.0909090909091) internal successors, (1761), 11 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:40,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:04:40,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 415 [2023-09-01 15:04:40,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:04:40,656 INFO L130 PetriNetUnfolder]: 459/940 cut-off events. [2023-09-01 15:04:40,656 INFO L131 PetriNetUnfolder]: For 10700/10700 co-relation queries the response was YES. [2023-09-01 15:04:40,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6471 conditions, 940 events. 459/940 cut-off events. For 10700/10700 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5251 event pairs, 66 based on Foata normal form. 9/948 useless extension candidates. Maximal degree in co-relation 6401. Up to 422 conditions per place. [2023-09-01 15:04:40,668 INFO L137 encePairwiseOnDemand]: 409/415 looper letters, 145 selfloop transitions, 96 changer transitions 6/247 dead transitions. [2023-09-01 15:04:40,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 247 transitions, 3610 flow [2023-09-01 15:04:40,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 15:04:40,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 15:04:40,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2295 transitions. [2023-09-01 15:04:40,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39500860585197933 [2023-09-01 15:04:40,672 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2295 transitions. [2023-09-01 15:04:40,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2295 transitions. [2023-09-01 15:04:40,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:04:40,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2295 transitions. [2023-09-01 15:04:40,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 163.92857142857142) internal successors, (2295), 14 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:40,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 415.0) internal successors, (6225), 15 states have internal predecessors, (6225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:40,680 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 415.0) internal successors, (6225), 15 states have internal predecessors, (6225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:40,681 INFO L175 Difference]: Start difference. First operand has 201 places, 165 transitions, 2211 flow. Second operand 14 states and 2295 transitions. [2023-09-01 15:04:40,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 247 transitions, 3610 flow [2023-09-01 15:04:40,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 247 transitions, 2921 flow, removed 246 selfloop flow, removed 32 redundant places. [2023-09-01 15:04:40,738 INFO L231 Difference]: Finished difference. Result has 166 places, 185 transitions, 2362 flow [2023-09-01 15:04:40,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=1783, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2362, PETRI_PLACES=166, PETRI_TRANSITIONS=185} [2023-09-01 15:04:40,739 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 145 predicate places. [2023-09-01 15:04:40,739 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 185 transitions, 2362 flow [2023-09-01 15:04:40,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 160.0909090909091) internal successors, (1761), 11 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:40,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:04:40,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:04:40,745 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 15:04:40,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:04:40,953 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 15:04:40,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:04:40,954 INFO L85 PathProgramCache]: Analyzing trace with hash 545860189, now seen corresponding path program 7 times [2023-09-01 15:04:40,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:04:40,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525627144] [2023-09-01 15:04:40,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:04:40,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:04:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:04:41,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:04:41,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:04:41,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525627144] [2023-09-01 15:04:41,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525627144] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:04:41,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898975008] [2023-09-01 15:04:41,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 15:04:41,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:04:41,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:04:41,153 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 15:04:41,155 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 15:04:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:04:41,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2023-09-01 15:04:41,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:04:41,580 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 15:04:41,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2023-09-01 15:04:41,608 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 15:04:41,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:04:41,828 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:04:41,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 230 treesize of output 230 [2023-09-01 15:04:44,880 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 15:04:44,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898975008] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:04:44,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:04:44,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-09-01 15:04:44,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954782854] [2023-09-01 15:04:44,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:04:44,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 15:04:44,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:04:44,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 15:04:44,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-09-01 15:04:46,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 415 [2023-09-01 15:04:46,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 185 transitions, 2362 flow. Second operand has 20 states, 20 states have (on average 141.4) internal successors, (2828), 20 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:46,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:04:46,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 415 [2023-09-01 15:04:46,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:04:46,812 INFO L130 PetriNetUnfolder]: 507/1033 cut-off events. [2023-09-01 15:04:46,812 INFO L131 PetriNetUnfolder]: For 8107/8107 co-relation queries the response was YES. [2023-09-01 15:04:46,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6476 conditions, 1033 events. 507/1033 cut-off events. For 8107/8107 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5887 event pairs, 6 based on Foata normal form. 7/1039 useless extension candidates. Maximal degree in co-relation 6418. Up to 458 conditions per place. [2023-09-01 15:04:46,819 INFO L137 encePairwiseOnDemand]: 404/415 looper letters, 147 selfloop transitions, 117 changer transitions 25/289 dead transitions. [2023-09-01 15:04:46,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 289 transitions, 3807 flow [2023-09-01 15:04:46,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 15:04:46,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 15:04:46,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3459 transitions. [2023-09-01 15:04:46,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.347289156626506 [2023-09-01 15:04:46,825 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3459 transitions. [2023-09-01 15:04:46,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3459 transitions. [2023-09-01 15:04:46,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:04:46,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3459 transitions. [2023-09-01 15:04:46,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 144.125) internal successors, (3459), 24 states have internal predecessors, (3459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:46,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 415.0) internal successors, (10375), 25 states have internal predecessors, (10375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:46,838 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 415.0) internal successors, (10375), 25 states have internal predecessors, (10375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:46,838 INFO L175 Difference]: Start difference. First operand has 166 places, 185 transitions, 2362 flow. Second operand 24 states and 3459 transitions. [2023-09-01 15:04:46,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 289 transitions, 3807 flow [2023-09-01 15:04:46,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 289 transitions, 3534 flow, removed 67 selfloop flow, removed 7 redundant places. [2023-09-01 15:04:46,884 INFO L231 Difference]: Finished difference. Result has 185 places, 207 transitions, 2775 flow [2023-09-01 15:04:46,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=2173, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2775, PETRI_PLACES=185, PETRI_TRANSITIONS=207} [2023-09-01 15:04:46,885 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 164 predicate places. [2023-09-01 15:04:46,885 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 207 transitions, 2775 flow [2023-09-01 15:04:46,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 141.4) internal successors, (2828), 20 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:46,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:04:46,886 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:04:46,895 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 15:04:47,091 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,SelfDestructingSolverStorable14 [2023-09-01 15:04:47,091 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 15:04:47,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:04:47,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1725431793, now seen corresponding path program 8 times [2023-09-01 15:04:47,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:04:47,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525613858] [2023-09-01 15:04:47,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:04:47,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:04:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:04:47,833 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 15:04:47,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:04:47,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525613858] [2023-09-01 15:04:47,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525613858] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:04:47,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883437978] [2023-09-01 15:04:47,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 15:04:47,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:04:47,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:04:47,837 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 15:04:47,844 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 15:04:47,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 15:04:47,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:04:47,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 31 conjunts are in the unsatisfiable core [2023-09-01 15:04:47,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:04:48,589 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 15:04:48,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 29 [2023-09-01 15:04:48,630 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 15:04:48,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:04:49,296 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:04:49,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 61 [2023-09-01 15:04:49,521 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 15:04:49,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883437978] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:04:49,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:04:49,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 19 [2023-09-01 15:04:49,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014436345] [2023-09-01 15:04:49,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:04:49,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 15:04:49,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:04:49,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 15:04:49,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-09-01 15:04:50,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 415 [2023-09-01 15:04:50,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 207 transitions, 2775 flow. Second operand has 21 states, 21 states have (on average 145.04761904761904) internal successors, (3046), 21 states have internal predecessors, (3046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:50,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:04:50,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 415 [2023-09-01 15:04:50,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:04:51,239 INFO L130 PetriNetUnfolder]: 483/970 cut-off events. [2023-09-01 15:04:51,239 INFO L131 PetriNetUnfolder]: For 8302/8310 co-relation queries the response was YES. [2023-09-01 15:04:51,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6279 conditions, 970 events. 483/970 cut-off events. For 8302/8310 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5395 event pairs, 55 based on Foata normal form. 3/970 useless extension candidates. Maximal degree in co-relation 6220. Up to 800 conditions per place. [2023-09-01 15:04:51,249 INFO L137 encePairwiseOnDemand]: 407/415 looper letters, 158 selfloop transitions, 16 changer transitions 55/235 dead transitions. [2023-09-01 15:04:51,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 235 transitions, 3419 flow [2023-09-01 15:04:51,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 15:04:51,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 15:04:51,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1485 transitions. [2023-09-01 15:04:51,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3578313253012048 [2023-09-01 15:04:51,252 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1485 transitions. [2023-09-01 15:04:51,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1485 transitions. [2023-09-01 15:04:51,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:04:51,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1485 transitions. [2023-09-01 15:04:51,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 148.5) internal successors, (1485), 10 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 15:04:51,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 415.0) internal successors, (4565), 11 states have internal predecessors, (4565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:51,257 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 415.0) internal successors, (4565), 11 states have internal predecessors, (4565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:51,257 INFO L175 Difference]: Start difference. First operand has 185 places, 207 transitions, 2775 flow. Second operand 10 states and 1485 transitions. [2023-09-01 15:04:51,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 235 transitions, 3419 flow [2023-09-01 15:04:51,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 235 transitions, 3142 flow, removed 58 selfloop flow, removed 23 redundant places. [2023-09-01 15:04:51,306 INFO L231 Difference]: Finished difference. Result has 164 places, 175 transitions, 2180 flow [2023-09-01 15:04:51,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=2505, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2180, PETRI_PLACES=164, PETRI_TRANSITIONS=175} [2023-09-01 15:04:51,306 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 143 predicate places. [2023-09-01 15:04:51,306 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 175 transitions, 2180 flow [2023-09-01 15:04:51,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 145.04761904761904) internal successors, (3046), 21 states have internal predecessors, (3046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:51,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:04:51,307 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:04:51,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 15:04:51,513 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,SelfDestructingSolverStorable15 [2023-09-01 15:04:51,513 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 15:04:51,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:04:51,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1271063327, now seen corresponding path program 9 times [2023-09-01 15:04:51,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:04:51,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758398000] [2023-09-01 15:04:51,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:04:51,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:04:51,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:04:51,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:04:51,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:04:51,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758398000] [2023-09-01 15:04:51,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758398000] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:04:51,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900485444] [2023-09-01 15:04:51,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 15:04:51,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:04:51,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:04:51,738 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 15:04:51,749 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 15:04:51,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 15:04:51,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:04:51,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 15:04:51,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:04:52,183 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 15:04:52,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 165 [2023-09-01 15:04:52,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:04:52,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:04:52,952 INFO L321 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2023-09-01 15:04:52,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 42 [2023-09-01 15:04:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:04:52,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900485444] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:04:52,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:04:52,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 17 [2023-09-01 15:04:52,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948655090] [2023-09-01 15:04:52,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:04:52,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 15:04:52,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:04:52,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 15:04:52,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-09-01 15:04:53,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 415 [2023-09-01 15:04:53,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 175 transitions, 2180 flow. Second operand has 17 states, 17 states have (on average 145.2941176470588) internal successors, (2470), 17 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:53,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:04:53,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 415 [2023-09-01 15:04:53,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:04:57,496 INFO L130 PetriNetUnfolder]: 642/1255 cut-off events. [2023-09-01 15:04:57,497 INFO L131 PetriNetUnfolder]: For 8671/8671 co-relation queries the response was YES. [2023-09-01 15:04:57,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7617 conditions, 1255 events. 642/1255 cut-off events. For 8671/8671 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7371 event pairs, 40 based on Foata normal form. 11/1265 useless extension candidates. Maximal degree in co-relation 7562. Up to 325 conditions per place. [2023-09-01 15:04:57,507 INFO L137 encePairwiseOnDemand]: 406/415 looper letters, 206 selfloop transitions, 141 changer transitions 16/363 dead transitions. [2023-09-01 15:04:57,507 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 363 transitions, 4352 flow [2023-09-01 15:04:57,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 15:04:57,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 15:04:57,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4504 transitions. [2023-09-01 15:04:57,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36176706827309235 [2023-09-01 15:04:57,513 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4504 transitions. [2023-09-01 15:04:57,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4504 transitions. [2023-09-01 15:04:57,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:04:57,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4504 transitions. [2023-09-01 15:04:57,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 150.13333333333333) internal successors, (4504), 30 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:57,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 415.0) internal successors, (12865), 31 states have internal predecessors, (12865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:57,528 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 415.0) internal successors, (12865), 31 states have internal predecessors, (12865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:57,528 INFO L175 Difference]: Start difference. First operand has 164 places, 175 transitions, 2180 flow. Second operand 30 states and 4504 transitions. [2023-09-01 15:04:57,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 363 transitions, 4352 flow [2023-09-01 15:04:57,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 363 transitions, 4154 flow, removed 46 selfloop flow, removed 10 redundant places. [2023-09-01 15:04:57,579 INFO L231 Difference]: Finished difference. Result has 172 places, 229 transitions, 3208 flow [2023-09-01 15:04:57,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=2041, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3208, PETRI_PLACES=172, PETRI_TRANSITIONS=229} [2023-09-01 15:04:57,580 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 151 predicate places. [2023-09-01 15:04:57,580 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 229 transitions, 3208 flow [2023-09-01 15:04:57,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 145.2941176470588) internal successors, (2470), 17 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:57,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:04:57,580 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:04:57,587 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 15:04:57,786 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,SelfDestructingSolverStorable16 [2023-09-01 15:04:57,786 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 15:04:57,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:04:57,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1372104974, now seen corresponding path program 2 times [2023-09-01 15:04:57,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:04:57,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295610212] [2023-09-01 15:04:57,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:04:57,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:04:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:04:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:04:57,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:04:57,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295610212] [2023-09-01 15:04:57,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295610212] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:04:57,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652457943] [2023-09-01 15:04:57,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 15:04:57,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:04:57,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:04:57,961 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 15:04:57,988 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 15:04:58,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 15:04:58,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:04:58,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 15:04:58,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:04:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:04:58,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:04:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:04:58,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652457943] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:04:58,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:04:58,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 15:04:58,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834964655] [2023-09-01 15:04:58,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:04:58,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 15:04:58,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:04:58,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 15:04:58,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-09-01 15:04:58,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 415 [2023-09-01 15:04:58,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 229 transitions, 3208 flow. Second operand has 12 states, 12 states have (on average 160.0) internal successors, (1920), 12 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:58,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:04:58,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 415 [2023-09-01 15:04:58,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:04:59,275 INFO L130 PetriNetUnfolder]: 711/1369 cut-off events. [2023-09-01 15:04:59,275 INFO L131 PetriNetUnfolder]: For 10946/10946 co-relation queries the response was YES. [2023-09-01 15:04:59,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8815 conditions, 1369 events. 711/1369 cut-off events. For 10946/10946 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8047 event pairs, 141 based on Foata normal form. 8/1376 useless extension candidates. Maximal degree in co-relation 8755. Up to 716 conditions per place. [2023-09-01 15:04:59,286 INFO L137 encePairwiseOnDemand]: 409/415 looper letters, 210 selfloop transitions, 105 changer transitions 0/315 dead transitions. [2023-09-01 15:04:59,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 315 transitions, 4516 flow [2023-09-01 15:04:59,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 15:04:59,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 15:04:59,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2802 transitions. [2023-09-01 15:04:59,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39716513111268603 [2023-09-01 15:04:59,297 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2802 transitions. [2023-09-01 15:04:59,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2802 transitions. [2023-09-01 15:04:59,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:04:59,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2802 transitions. [2023-09-01 15:04:59,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 164.8235294117647) internal successors, (2802), 17 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:59,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 415.0) internal successors, (7470), 18 states have internal predecessors, (7470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:59,310 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 415.0) internal successors, (7470), 18 states have internal predecessors, (7470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:59,310 INFO L175 Difference]: Start difference. First operand has 172 places, 229 transitions, 3208 flow. Second operand 17 states and 2802 transitions. [2023-09-01 15:04:59,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 315 transitions, 4516 flow [2023-09-01 15:04:59,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 315 transitions, 4307 flow, removed 64 selfloop flow, removed 11 redundant places. [2023-09-01 15:04:59,380 INFO L231 Difference]: Finished difference. Result has 181 places, 257 transitions, 3714 flow [2023-09-01 15:04:59,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=3027, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3714, PETRI_PLACES=181, PETRI_TRANSITIONS=257} [2023-09-01 15:04:59,380 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 160 predicate places. [2023-09-01 15:04:59,380 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 257 transitions, 3714 flow [2023-09-01 15:04:59,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 160.0) internal successors, (1920), 12 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:59,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:04:59,381 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:04:59,387 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 15:04:59,587 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,SelfDestructingSolverStorable17 [2023-09-01 15:04:59,587 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 15:04:59,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:04:59,587 INFO L85 PathProgramCache]: Analyzing trace with hash 136038158, now seen corresponding path program 3 times [2023-09-01 15:04:59,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:04:59,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84333851] [2023-09-01 15:04:59,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:04:59,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:04:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:04:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:04:59,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:04:59,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84333851] [2023-09-01 15:04:59,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84333851] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:04:59,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206699495] [2023-09-01 15:04:59,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 15:04:59,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:04:59,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:04:59,805 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 15:04:59,829 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 15:04:59,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 15:04:59,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:04:59,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 15:04:59,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:05:00,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:05:00,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:05:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:05:00,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206699495] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:05:00,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:05:00,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 15:05:00,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122863895] [2023-09-01 15:05:00,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:05:00,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 15:05:00,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:05:00,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 15:05:00,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-09-01 15:05:00,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 415 [2023-09-01 15:05:00,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 257 transitions, 3714 flow. Second operand has 12 states, 12 states have (on average 161.33333333333334) internal successors, (1936), 12 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:00,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:05:00,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 415 [2023-09-01 15:05:00,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:05:01,933 INFO L130 PetriNetUnfolder]: 822/1592 cut-off events. [2023-09-01 15:05:01,933 INFO L131 PetriNetUnfolder]: For 13653/13653 co-relation queries the response was YES. [2023-09-01 15:05:01,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10416 conditions, 1592 events. 822/1592 cut-off events. For 13653/13653 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 9700 event pairs, 106 based on Foata normal form. 36/1627 useless extension candidates. Maximal degree in co-relation 10353. Up to 773 conditions per place. [2023-09-01 15:05:01,946 INFO L137 encePairwiseOnDemand]: 409/415 looper letters, 202 selfloop transitions, 164 changer transitions 0/366 dead transitions. [2023-09-01 15:05:01,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 366 transitions, 5498 flow [2023-09-01 15:05:01,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 15:05:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 15:05:01,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2972 transitions. [2023-09-01 15:05:01,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39785809906291836 [2023-09-01 15:05:01,951 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2972 transitions. [2023-09-01 15:05:01,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2972 transitions. [2023-09-01 15:05:01,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:05:01,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2972 transitions. [2023-09-01 15:05:01,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 165.11111111111111) internal successors, (2972), 18 states have internal predecessors, (2972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:01,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 415.0) internal successors, (7885), 19 states have internal predecessors, (7885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:01,960 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 415.0) internal successors, (7885), 19 states have internal predecessors, (7885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:01,960 INFO L175 Difference]: Start difference. First operand has 181 places, 257 transitions, 3714 flow. Second operand 18 states and 2972 transitions. [2023-09-01 15:05:01,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 366 transitions, 5498 flow [2023-09-01 15:05:02,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 366 transitions, 5264 flow, removed 76 selfloop flow, removed 6 redundant places. [2023-09-01 15:05:02,058 INFO L231 Difference]: Finished difference. Result has 197 places, 301 transitions, 4690 flow [2023-09-01 15:05:02,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=3492, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4690, PETRI_PLACES=197, PETRI_TRANSITIONS=301} [2023-09-01 15:05:02,059 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 176 predicate places. [2023-09-01 15:05:02,059 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 301 transitions, 4690 flow [2023-09-01 15:05:02,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 161.33333333333334) internal successors, (1936), 12 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:02,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:05:02,060 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:05:02,072 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 15:05:02,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:05:02,265 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 15:05:02,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:05:02,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1658416748, now seen corresponding path program 4 times [2023-09-01 15:05:02,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:05:02,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721288713] [2023-09-01 15:05:02,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:05:02,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:05:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:05:02,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:05:02,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:05:02,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721288713] [2023-09-01 15:05:02,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721288713] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:05:02,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384379163] [2023-09-01 15:05:02,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 15:05:02,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:05:02,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:05:02,501 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 15:05:02,511 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 15:05:02,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 15:05:02,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:05:02,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 15:05:02,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:05:02,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:05:02,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:05:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:05:02,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384379163] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:05:02,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:05:02,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 15:05:02,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645742885] [2023-09-01 15:05:02,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:05:02,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 15:05:02,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:05:02,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 15:05:02,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-09-01 15:05:03,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 415 [2023-09-01 15:05:03,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 301 transitions, 4690 flow. Second operand has 12 states, 12 states have (on average 160.0) internal successors, (1920), 12 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:03,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:05:03,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 415 [2023-09-01 15:05:03,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:05:03,911 INFO L130 PetriNetUnfolder]: 824/1580 cut-off events. [2023-09-01 15:05:03,912 INFO L131 PetriNetUnfolder]: For 15880/15880 co-relation queries the response was YES. [2023-09-01 15:05:03,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10972 conditions, 1580 events. 824/1580 cut-off events. For 15880/15880 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 9490 event pairs, 108 based on Foata normal form. 8/1587 useless extension candidates. Maximal degree in co-relation 10904. Up to 793 conditions per place. [2023-09-01 15:05:03,923 INFO L137 encePairwiseOnDemand]: 409/415 looper letters, 192 selfloop transitions, 157 changer transitions 0/349 dead transitions. [2023-09-01 15:05:03,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 349 transitions, 5679 flow [2023-09-01 15:05:03,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 15:05:03,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 15:05:03,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2304 transitions. [2023-09-01 15:05:03,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39655765920826164 [2023-09-01 15:05:03,926 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2304 transitions. [2023-09-01 15:05:03,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2304 transitions. [2023-09-01 15:05:03,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:05:03,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2304 transitions. [2023-09-01 15:05:03,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 164.57142857142858) internal successors, (2304), 14 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:03,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 415.0) internal successors, (6225), 15 states have internal predecessors, (6225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:03,933 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 415.0) internal successors, (6225), 15 states have internal predecessors, (6225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:03,933 INFO L175 Difference]: Start difference. First operand has 197 places, 301 transitions, 4690 flow. Second operand 14 states and 2304 transitions. [2023-09-01 15:05:03,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 349 transitions, 5679 flow [2023-09-01 15:05:04,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 349 transitions, 5442 flow, removed 76 selfloop flow, removed 8 redundant places. [2023-09-01 15:05:04,047 INFO L231 Difference]: Finished difference. Result has 202 places, 302 transitions, 4800 flow [2023-09-01 15:05:04,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=4369, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4800, PETRI_PLACES=202, PETRI_TRANSITIONS=302} [2023-09-01 15:05:04,048 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 181 predicate places. [2023-09-01 15:05:04,048 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 302 transitions, 4800 flow [2023-09-01 15:05:04,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 160.0) internal successors, (1920), 12 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:04,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:05:04,049 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:05:04,054 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 15:05:04,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-09-01 15:05:04,249 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 15:05:04,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:05:04,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1109147078, now seen corresponding path program 5 times [2023-09-01 15:05:04,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:05:04,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998650521] [2023-09-01 15:05:04,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:05:04,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:05:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:05:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:05:04,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:05:04,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998650521] [2023-09-01 15:05:04,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998650521] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:05:04,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524345817] [2023-09-01 15:05:04,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 15:05:04,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:05:04,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:05:04,454 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 15:05:04,479 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 15:05:04,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 15:05:04,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:05:04,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 15:05:04,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:05:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:05:04,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:05:04,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:05:04,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524345817] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:05:04,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:05:04,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-09-01 15:05:04,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352267941] [2023-09-01 15:05:04,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:05:04,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 15:05:04,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:05:04,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 15:05:04,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-09-01 15:05:04,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 415 [2023-09-01 15:05:04,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 302 transitions, 4800 flow. Second operand has 13 states, 13 states have (on average 159.92307692307693) internal successors, (2079), 13 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:04,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:05:04,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 415 [2023-09-01 15:05:04,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:05:05,979 INFO L130 PetriNetUnfolder]: 1137/2193 cut-off events. [2023-09-01 15:05:05,979 INFO L131 PetriNetUnfolder]: For 24169/24169 co-relation queries the response was YES. [2023-09-01 15:05:05,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15417 conditions, 2193 events. 1137/2193 cut-off events. For 24169/24169 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 14104 event pairs, 53 based on Foata normal form. 6/2198 useless extension candidates. Maximal degree in co-relation 15349. Up to 667 conditions per place. [2023-09-01 15:05:05,994 INFO L137 encePairwiseOnDemand]: 408/415 looper letters, 244 selfloop transitions, 249 changer transitions 0/493 dead transitions. [2023-09-01 15:05:05,994 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 493 transitions, 8068 flow [2023-09-01 15:05:05,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 15:05:05,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 15:05:05,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2980 transitions. [2023-09-01 15:05:05,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3989290495314592 [2023-09-01 15:05:05,997 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2980 transitions. [2023-09-01 15:05:05,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2980 transitions. [2023-09-01 15:05:05,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:05:05,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2980 transitions. [2023-09-01 15:05:06,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 165.55555555555554) internal successors, (2980), 18 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:06,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 415.0) internal successors, (7885), 19 states have internal predecessors, (7885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:06,006 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 415.0) internal successors, (7885), 19 states have internal predecessors, (7885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:06,006 INFO L175 Difference]: Start difference. First operand has 202 places, 302 transitions, 4800 flow. Second operand 18 states and 2980 transitions. [2023-09-01 15:05:06,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 493 transitions, 8068 flow [2023-09-01 15:05:06,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 493 transitions, 7690 flow, removed 46 selfloop flow, removed 10 redundant places. [2023-09-01 15:05:06,142 INFO L231 Difference]: Finished difference. Result has 218 places, 380 transitions, 6575 flow [2023-09-01 15:05:06,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=4476, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6575, PETRI_PLACES=218, PETRI_TRANSITIONS=380} [2023-09-01 15:05:06,143 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 197 predicate places. [2023-09-01 15:05:06,143 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 380 transitions, 6575 flow [2023-09-01 15:05:06,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 159.92307692307693) internal successors, (2079), 13 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:06,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:05:06,144 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:05:06,153 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 15:05:06,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:05:06,348 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 15:05:06,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:05:06,348 INFO L85 PathProgramCache]: Analyzing trace with hash 685307828, now seen corresponding path program 6 times [2023-09-01 15:05:06,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:05:06,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679251119] [2023-09-01 15:05:06,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:05:06,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:05:06,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:05:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:05:06,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:05:06,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679251119] [2023-09-01 15:05:06,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679251119] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:05:06,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268243623] [2023-09-01 15:05:06,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 15:05:06,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:05:06,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:05:06,625 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 15:05:06,628 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 15:05:06,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 15:05:06,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:05:06,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 15:05:06,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:05:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:05:06,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:05:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:05:06,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268243623] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:05:06,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:05:06,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-09-01 15:05:06,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075048477] [2023-09-01 15:05:06,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:05:06,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 15:05:06,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:05:06,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 15:05:06,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-09-01 15:05:07,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 415 [2023-09-01 15:05:07,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 380 transitions, 6575 flow. Second operand has 13 states, 13 states have (on average 161.23076923076923) internal successors, (2096), 13 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:07,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:05:07,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 415 [2023-09-01 15:05:07,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:05:08,530 INFO L130 PetriNetUnfolder]: 1122/2156 cut-off events. [2023-09-01 15:05:08,531 INFO L131 PetriNetUnfolder]: For 28120/28120 co-relation queries the response was YES. [2023-09-01 15:05:08,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16240 conditions, 2156 events. 1122/2156 cut-off events. For 28120/28120 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 13739 event pairs, 51 based on Foata normal form. 20/2175 useless extension candidates. Maximal degree in co-relation 16165. Up to 651 conditions per place. [2023-09-01 15:05:08,546 INFO L137 encePairwiseOnDemand]: 408/415 looper letters, 238 selfloop transitions, 246 changer transitions 0/484 dead transitions. [2023-09-01 15:05:08,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 484 transitions, 8585 flow [2023-09-01 15:05:08,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 15:05:08,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 15:05:08,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3308 transitions. [2023-09-01 15:05:08,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3985542168674699 [2023-09-01 15:05:08,548 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3308 transitions. [2023-09-01 15:05:08,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3308 transitions. [2023-09-01 15:05:08,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:05:08,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3308 transitions. [2023-09-01 15:05:08,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 165.4) internal successors, (3308), 20 states have internal predecessors, (3308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:08,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 415.0) internal successors, (8715), 21 states have internal predecessors, (8715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:08,558 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 415.0) internal successors, (8715), 21 states have internal predecessors, (8715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:08,558 INFO L175 Difference]: Start difference. First operand has 218 places, 380 transitions, 6575 flow. Second operand 20 states and 3308 transitions. [2023-09-01 15:05:08,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 484 transitions, 8585 flow [2023-09-01 15:05:08,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 484 transitions, 8209 flow, removed 139 selfloop flow, removed 7 redundant places. [2023-09-01 15:05:08,721 INFO L231 Difference]: Finished difference. Result has 235 places, 385 transitions, 6858 flow [2023-09-01 15:05:08,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=6105, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6858, PETRI_PLACES=235, PETRI_TRANSITIONS=385} [2023-09-01 15:05:08,721 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 214 predicate places. [2023-09-01 15:05:08,721 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 385 transitions, 6858 flow [2023-09-01 15:05:08,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 161.23076923076923) internal successors, (2096), 13 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:08,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:05:08,722 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:05:08,726 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 15:05:08,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:05:08,922 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 15:05:08,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:05:08,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1430013814, now seen corresponding path program 7 times [2023-09-01 15:05:08,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:05:08,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322635245] [2023-09-01 15:05:08,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:05:08,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:05:08,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:05:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:05:09,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:05:09,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322635245] [2023-09-01 15:05:09,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322635245] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:05:09,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423706062] [2023-09-01 15:05:09,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 15:05:09,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:05:09,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:05:09,061 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 15:05:09,075 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 15:05:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:05:09,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 15:05:09,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:05:09,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:05:09,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:05:09,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:05:09,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423706062] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:05:09,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:05:09,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-09-01 15:05:09,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404024247] [2023-09-01 15:05:09,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:05:09,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 15:05:09,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:05:09,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 15:05:09,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-09-01 15:05:09,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 415 [2023-09-01 15:05:09,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 385 transitions, 6858 flow. Second operand has 13 states, 13 states have (on average 159.92307692307693) internal successors, (2079), 13 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:09,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:05:09,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 415 [2023-09-01 15:05:09,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:05:10,531 INFO L130 PetriNetUnfolder]: 1119/2135 cut-off events. [2023-09-01 15:05:10,531 INFO L131 PetriNetUnfolder]: For 28054/28054 co-relation queries the response was YES. [2023-09-01 15:05:10,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16496 conditions, 2135 events. 1119/2135 cut-off events. For 28054/28054 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 13457 event pairs, 57 based on Foata normal form. 6/2140 useless extension candidates. Maximal degree in co-relation 16417. Up to 830 conditions per place. [2023-09-01 15:05:10,548 INFO L137 encePairwiseOnDemand]: 409/415 looper letters, 237 selfloop transitions, 226 changer transitions 0/463 dead transitions. [2023-09-01 15:05:10,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 463 transitions, 8557 flow [2023-09-01 15:05:10,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 15:05:10,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 15:05:10,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2475 transitions. [2023-09-01 15:05:10,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39759036144578314 [2023-09-01 15:05:10,555 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2475 transitions. [2023-09-01 15:05:10,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2475 transitions. [2023-09-01 15:05:10,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:05:10,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2475 transitions. [2023-09-01 15:05:10,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:10,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 415.0) internal successors, (6640), 16 states have internal predecessors, (6640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:10,562 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 415.0) internal successors, (6640), 16 states have internal predecessors, (6640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:10,562 INFO L175 Difference]: Start difference. First operand has 235 places, 385 transitions, 6858 flow. Second operand 15 states and 2475 transitions. [2023-09-01 15:05:10,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 463 transitions, 8557 flow [2023-09-01 15:05:10,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 463 transitions, 8198 flow, removed 41 selfloop flow, removed 9 redundant places. [2023-09-01 15:05:10,749 INFO L231 Difference]: Finished difference. Result has 240 places, 391 transitions, 7098 flow [2023-09-01 15:05:10,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=6421, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7098, PETRI_PLACES=240, PETRI_TRANSITIONS=391} [2023-09-01 15:05:10,750 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 219 predicate places. [2023-09-01 15:05:10,750 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 391 transitions, 7098 flow [2023-09-01 15:05:10,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 159.92307692307693) internal successors, (2079), 13 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:10,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:05:10,750 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:05:10,755 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 15:05:10,951 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,SelfDestructingSolverStorable22 [2023-09-01 15:05:10,951 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 15:05:10,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:05:10,952 INFO L85 PathProgramCache]: Analyzing trace with hash 239254679, now seen corresponding path program 8 times [2023-09-01 15:05:10,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:05:10,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242522649] [2023-09-01 15:05:10,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:05:10,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:05:10,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:05:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:05:11,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:05:11,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242522649] [2023-09-01 15:05:11,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242522649] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:05:11,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983033413] [2023-09-01 15:05:11,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 15:05:11,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:05:11,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:05:11,146 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 15:05:11,149 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 15:05:11,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 15:05:11,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:05:11,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 15:05:11,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:05:11,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:05:11,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:05:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:05:11,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983033413] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:05:11,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:05:11,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-09-01 15:05:11,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941886688] [2023-09-01 15:05:11,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:05:11,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 15:05:11,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:05:11,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 15:05:11,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-09-01 15:05:11,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 415 [2023-09-01 15:05:11,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 391 transitions, 7098 flow. Second operand has 13 states, 13 states have (on average 161.30769230769232) internal successors, (2097), 13 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:11,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:05:11,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 415 [2023-09-01 15:05:11,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:05:13,026 INFO L130 PetriNetUnfolder]: 1134/2170 cut-off events. [2023-09-01 15:05:13,026 INFO L131 PetriNetUnfolder]: For 29662/29662 co-relation queries the response was YES. [2023-09-01 15:05:13,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17019 conditions, 2170 events. 1134/2170 cut-off events. For 29662/29662 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 13725 event pairs, 149 based on Foata normal form. 20/2189 useless extension candidates. Maximal degree in co-relation 16941. Up to 657 conditions per place. [2023-09-01 15:05:13,046 INFO L137 encePairwiseOnDemand]: 409/415 looper letters, 259 selfloop transitions, 218 changer transitions 0/477 dead transitions. [2023-09-01 15:05:13,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 477 transitions, 8781 flow [2023-09-01 15:05:13,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 15:05:13,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 15:05:13,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3294 transitions. [2023-09-01 15:05:13,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968674698795181 [2023-09-01 15:05:13,050 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3294 transitions. [2023-09-01 15:05:13,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3294 transitions. [2023-09-01 15:05:13,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:05:13,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3294 transitions. [2023-09-01 15:05:13,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 164.7) internal successors, (3294), 20 states have internal predecessors, (3294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:13,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 415.0) internal successors, (8715), 21 states have internal predecessors, (8715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:13,059 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 415.0) internal successors, (8715), 21 states have internal predecessors, (8715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:13,059 INFO L175 Difference]: Start difference. First operand has 240 places, 391 transitions, 7098 flow. Second operand 20 states and 3294 transitions. [2023-09-01 15:05:13,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 477 transitions, 8781 flow [2023-09-01 15:05:13,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 477 transitions, 8591 flow, removed 42 selfloop flow, removed 5 redundant places. [2023-09-01 15:05:13,226 INFO L231 Difference]: Finished difference. Result has 259 places, 400 transitions, 7557 flow [2023-09-01 15:05:13,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=6914, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7557, PETRI_PLACES=259, PETRI_TRANSITIONS=400} [2023-09-01 15:05:13,226 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 238 predicate places. [2023-09-01 15:05:13,226 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 400 transitions, 7557 flow [2023-09-01 15:05:13,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 161.30769230769232) internal successors, (2097), 13 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:13,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:05:13,227 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:05:13,234 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 15:05:13,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:05:13,427 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 15:05:13,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:05:13,428 INFO L85 PathProgramCache]: Analyzing trace with hash 955045235, now seen corresponding path program 10 times [2023-09-01 15:05:13,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:05:13,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404089750] [2023-09-01 15:05:13,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:05:13,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:05:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:05:14,247 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 15:05:14,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:05:14,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404089750] [2023-09-01 15:05:14,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404089750] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:05:14,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29866111] [2023-09-01 15:05:14,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 15:05:14,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:05:14,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:05:14,249 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 15:05:14,275 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 15:05:14,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 15:05:14,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:05:14,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 15:05:14,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:05:14,672 INFO L321 Elim1Store]: treesize reduction 17, result has 41.4 percent of original size [2023-09-01 15:05:14,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 189 treesize of output 183 [2023-09-01 15:05:14,762 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 15:05:14,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:05:15,427 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-09-01 15:05:15,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 77 [2023-09-01 15:05:15,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:05:15,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29866111] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:05:15,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:05:15,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 20 [2023-09-01 15:05:15,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688110828] [2023-09-01 15:05:15,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:05:15,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 15:05:15,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:05:15,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 15:05:15,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2023-09-01 15:05:17,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 415 [2023-09-01 15:05:17,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 400 transitions, 7557 flow. Second operand has 22 states, 22 states have (on average 140.22727272727272) internal successors, (3085), 22 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:17,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:05:17,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 415 [2023-09-01 15:05:17,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:05:21,310 INFO L130 PetriNetUnfolder]: 1595/2970 cut-off events. [2023-09-01 15:05:21,310 INFO L131 PetriNetUnfolder]: For 43693/43693 co-relation queries the response was YES. [2023-09-01 15:05:21,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24389 conditions, 2970 events. 1595/2970 cut-off events. For 43693/43693 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 19506 event pairs, 62 based on Foata normal form. 6/2974 useless extension candidates. Maximal degree in co-relation 24305. Up to 1052 conditions per place. [2023-09-01 15:05:21,333 INFO L137 encePairwiseOnDemand]: 404/415 looper letters, 334 selfloop transitions, 359 changer transitions 14/707 dead transitions. [2023-09-01 15:05:21,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 707 transitions, 13245 flow [2023-09-01 15:05:21,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-09-01 15:05:21,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-09-01 15:05:21,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4647 transitions. [2023-09-01 15:05:21,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34992469879518073 [2023-09-01 15:05:21,337 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4647 transitions. [2023-09-01 15:05:21,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4647 transitions. [2023-09-01 15:05:21,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:05:21,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4647 transitions. [2023-09-01 15:05:21,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 145.21875) internal successors, (4647), 32 states have internal predecessors, (4647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:21,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 415.0) internal successors, (13695), 33 states have internal predecessors, (13695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:21,350 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 415.0) internal successors, (13695), 33 states have internal predecessors, (13695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:21,350 INFO L175 Difference]: Start difference. First operand has 259 places, 400 transitions, 7557 flow. Second operand 32 states and 4647 transitions. [2023-09-01 15:05:21,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 707 transitions, 13245 flow [2023-09-01 15:05:21,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 707 transitions, 12879 flow, removed 86 selfloop flow, removed 9 redundant places. [2023-09-01 15:05:21,595 INFO L231 Difference]: Finished difference. Result has 291 places, 561 transitions, 11692 flow [2023-09-01 15:05:21,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=7299, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=11692, PETRI_PLACES=291, PETRI_TRANSITIONS=561} [2023-09-01 15:05:21,596 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 270 predicate places. [2023-09-01 15:05:21,596 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 561 transitions, 11692 flow [2023-09-01 15:05:21,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 140.22727272727272) internal successors, (3085), 22 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:21,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:05:21,597 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:05:21,605 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 15:05:21,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:05:21,803 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 15:05:21,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:05:21,803 INFO L85 PathProgramCache]: Analyzing trace with hash -2133292771, now seen corresponding path program 11 times [2023-09-01 15:05:21,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:05:21,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501313470] [2023-09-01 15:05:21,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:05:21,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:05:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:05:22,832 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 15:05:22,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:05:22,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501313470] [2023-09-01 15:05:22,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501313470] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:05:22,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498854990] [2023-09-01 15:05:22,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 15:05:22,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:05:22,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:05:22,834 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 15:05:22,836 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 15:05:22,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 15:05:22,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:05:22,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 51 conjunts are in the unsatisfiable core [2023-09-01 15:05:22,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:05:23,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-09-01 15:05:23,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 15:05:23,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 15:05:23,408 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:05:23,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 26 [2023-09-01 15:05:23,416 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 15:05:23,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:05:24,320 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:05:24,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 224 treesize of output 140 [2023-09-01 15:05:24,368 INFO L321 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-09-01 15:05:24,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 414 treesize of output 425 [2023-09-01 15:05:24,439 INFO L321 Elim1Store]: treesize reduction 8, result has 87.7 percent of original size [2023-09-01 15:05:24,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 350 treesize of output 326 [2023-09-01 15:05:24,511 INFO L321 Elim1Store]: treesize reduction 8, result has 87.7 percent of original size [2023-09-01 15:05:24,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 149 treesize of output 173 [2023-09-01 15:05:26,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:05:26,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498854990] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:05:26,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:05:26,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2023-09-01 15:05:26,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567992979] [2023-09-01 15:05:26,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:05:26,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 15:05:26,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:05:26,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 15:05:26,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=633, Unknown=2, NotChecked=0, Total=812 [2023-09-01 15:05:29,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:05:31,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:05:33,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:05:36,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:05:38,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:05:40,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:05:42,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:05:42,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 415 [2023-09-01 15:05:42,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 561 transitions, 11692 flow. Second operand has 29 states, 29 states have (on average 100.44827586206897) internal successors, (2913), 29 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:42,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:05:42,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 415 [2023-09-01 15:05:42,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:05:46,523 INFO L130 PetriNetUnfolder]: 1843/3522 cut-off events. [2023-09-01 15:05:46,523 INFO L131 PetriNetUnfolder]: For 61830/61830 co-relation queries the response was YES. [2023-09-01 15:05:46,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30110 conditions, 3522 events. 1843/3522 cut-off events. For 61830/61830 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 24655 event pairs, 91 based on Foata normal form. 7/3527 useless extension candidates. Maximal degree in co-relation 30018. Up to 919 conditions per place. [2023-09-01 15:05:46,554 INFO L137 encePairwiseOnDemand]: 403/415 looper letters, 203 selfloop transitions, 541 changer transitions 14/758 dead transitions. [2023-09-01 15:05:46,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 758 transitions, 16112 flow [2023-09-01 15:05:46,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 15:05:46,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 15:05:46,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3048 transitions. [2023-09-01 15:05:46,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25326132114665556 [2023-09-01 15:05:46,557 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3048 transitions. [2023-09-01 15:05:46,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3048 transitions. [2023-09-01 15:05:46,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:05:46,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3048 transitions. [2023-09-01 15:05:46,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 105.10344827586206) internal successors, (3048), 29 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:46,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 415.0) internal successors, (12450), 30 states have internal predecessors, (12450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:46,568 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 415.0) internal successors, (12450), 30 states have internal predecessors, (12450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:46,568 INFO L175 Difference]: Start difference. First operand has 291 places, 561 transitions, 11692 flow. Second operand 29 states and 3048 transitions. [2023-09-01 15:05:46,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 758 transitions, 16112 flow [2023-09-01 15:05:47,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 758 transitions, 15942 flow, removed 78 selfloop flow, removed 5 redundant places. [2023-09-01 15:05:47,020 INFO L231 Difference]: Finished difference. Result has 326 places, 672 transitions, 15963 flow [2023-09-01 15:05:47,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=11554, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=433, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=15963, PETRI_PLACES=326, PETRI_TRANSITIONS=672} [2023-09-01 15:05:47,021 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 305 predicate places. [2023-09-01 15:05:47,021 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 672 transitions, 15963 flow [2023-09-01 15:05:47,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 100.44827586206897) internal successors, (2913), 29 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:47,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:05:47,022 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:05:47,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 15:05:47,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:05:47,222 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 15:05:47,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:05:47,222 INFO L85 PathProgramCache]: Analyzing trace with hash -984517631, now seen corresponding path program 9 times [2023-09-01 15:05:47,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:05:47,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406758625] [2023-09-01 15:05:47,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:05:47,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:05:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:05:47,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:05:47,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:05:47,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406758625] [2023-09-01 15:05:47,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406758625] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:05:47,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253541076] [2023-09-01 15:05:47,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 15:05:47,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:05:47,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:05:47,396 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 15:05:47,397 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 15:05:47,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 15:05:47,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:05:47,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 15:05:47,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:05:47,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:05:47,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:11:53,412 WARN L222 SmtUtils]: Spent 6.05m on a formula simplification. DAG size of input: 3987 DAG size of output: 3675 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15