./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/test-easy11.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/test-easy11.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 a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 --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 14:53:47,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 14:53:47,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 14:53:47,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 14:53:47,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 14:53:47,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 14:53:47,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 14:53:47,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 14:53:47,447 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 14:53:47,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 14:53:47,452 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 14:53:47,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 14:53:47,455 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 14:53:47,457 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 14:53:47,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 14:53:47,464 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 14:53:47,465 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 14:53:47,466 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 14:53:47,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 14:53:47,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 14:53:47,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 14:53:47,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 14:53:47,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 14:53:47,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 14:53:47,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 14:53:47,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 14:53:47,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 14:53:47,486 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 14:53:47,487 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 14:53:47,487 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 14:53:47,488 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 14:53:47,490 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 14:53:47,491 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 14:53:47,492 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 14:53:47,493 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 14:53:47,493 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 14:53:47,494 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 14:53:47,494 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 14:53:47,494 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 14:53:47,495 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 14:53:47,495 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 14:53:47,497 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 14:53:47,535 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 14:53:47,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 14:53:47,536 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 14:53:47,536 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 14:53:47,537 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 14:53:47,538 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 14:53:47,538 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 14:53:47,538 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 14:53:47,539 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 14:53:47,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 14:53:47,540 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 14:53:47,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 14:53:47,540 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 14:53:47,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 14:53:47,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 14:53:47,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 14:53:47,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 14:53:47,541 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 14:53:47,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 14:53:47,542 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 14:53:47,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 14:53:47,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 14:53:47,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 14:53:47,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 14:53:47,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:53:47,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 14:53:47,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 14:53:47,544 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 14:53:47,544 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 14:53:47,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 14:53:47,544 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 14:53:47,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 14:53:47,545 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 14:53:47,545 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 14:53:47,545 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 14:53:47,546 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 14:53:47,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 14:53:47,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 14:53:47,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 14:53:47,869 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 14:53:47,869 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 14:53:47,870 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy11.wvr.c [2023-09-01 14:53:48,989 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 14:53:49,193 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 14:53:49,194 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy11.wvr.c [2023-09-01 14:53:49,200 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83c535545/032b770d343643f5951a61806c8d1853/FLAG871025076 [2023-09-01 14:53:49,221 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83c535545/032b770d343643f5951a61806c8d1853 [2023-09-01 14:53:49,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 14:53:49,224 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 14:53:49,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 14:53:49,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 14:53:49,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 14:53:49,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:53:49" (1/1) ... [2023-09-01 14:53:49,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cec1090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:53:49, skipping insertion in model container [2023-09-01 14:53:49,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:53:49" (1/1) ... [2023-09-01 14:53:49,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 14:53:49,253 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 14:53:49,414 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/test-easy11.wvr.c[2005,2018] [2023-09-01 14:53:49,417 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:53:49,426 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 14:53:49,448 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/test-easy11.wvr.c[2005,2018] [2023-09-01 14:53:49,453 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:53:49,459 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:53:49,460 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:53:49,465 INFO L208 MainTranslator]: Completed translation [2023-09-01 14:53:49,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:53:49 WrapperNode [2023-09-01 14:53:49,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 14:53:49,466 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 14:53:49,466 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 14:53:49,467 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 14:53:49,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:53:49" (1/1) ... [2023-09-01 14:53:49,479 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:53:49" (1/1) ... [2023-09-01 14:53:49,497 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2023-09-01 14:53:49,498 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 14:53:49,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 14:53:49,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 14:53:49,499 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 14:53:49,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:53:49" (1/1) ... [2023-09-01 14:53:49,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:53:49" (1/1) ... [2023-09-01 14:53:49,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:53:49" (1/1) ... [2023-09-01 14:53:49,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:53:49" (1/1) ... [2023-09-01 14:53:49,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:53:49" (1/1) ... [2023-09-01 14:53:49,530 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:53:49" (1/1) ... [2023-09-01 14:53:49,532 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:53:49" (1/1) ... [2023-09-01 14:53:49,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:53:49" (1/1) ... [2023-09-01 14:53:49,537 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 14:53:49,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 14:53:49,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 14:53:49,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 14:53:49,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:53:49" (1/1) ... [2023-09-01 14:53:49,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:53:49,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:53:49,566 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 14:53:49,591 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 14:53:49,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 14:53:49,607 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 14:53:49,607 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 14:53:49,608 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 14:53:49,608 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 14:53:49,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 14:53:49,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 14:53:49,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 14:53:49,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 14:53:49,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 14:53:49,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 14:53:49,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 14:53:49,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 14:53:49,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 14:53:49,610 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 14:53:49,703 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 14:53:49,705 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 14:53:49,933 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 14:53:49,939 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 14:53:49,943 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 14:53:49,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:53:49 BoogieIcfgContainer [2023-09-01 14:53:49,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 14:53:49,947 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 14:53:49,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 14:53:49,950 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 14:53:49,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:53:49" (1/3) ... [2023-09-01 14:53:49,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a2f4392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:53:49, skipping insertion in model container [2023-09-01 14:53:49,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:53:49" (2/3) ... [2023-09-01 14:53:49,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a2f4392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:53:49, skipping insertion in model container [2023-09-01 14:53:49,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:53:49" (3/3) ... [2023-09-01 14:53:49,953 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2023-09-01 14:53:49,959 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 14:53:49,967 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 14:53:49,967 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 14:53:49,967 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 14:53:50,040 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 14:53:50,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 81 transitions, 178 flow [2023-09-01 14:53:50,111 INFO L130 PetriNetUnfolder]: 6/79 cut-off events. [2023-09-01 14:53:50,115 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:53:50,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 79 events. 6/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2023-09-01 14:53:50,121 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 81 transitions, 178 flow [2023-09-01 14:53:50,125 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 154 flow [2023-09-01 14:53:50,129 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 14:53:50,140 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 71 transitions, 154 flow [2023-09-01 14:53:50,146 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 71 transitions, 154 flow [2023-09-01 14:53:50,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 71 transitions, 154 flow [2023-09-01 14:53:50,178 INFO L130 PetriNetUnfolder]: 6/71 cut-off events. [2023-09-01 14:53:50,181 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:53:50,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 71 events. 6/71 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 48 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2023-09-01 14:53:50,183 INFO L119 LiptonReduction]: Number of co-enabled transitions 572 [2023-09-01 14:53:52,009 INFO L134 LiptonReduction]: Checked pairs total: 581 [2023-09-01 14:53:52,009 INFO L136 LiptonReduction]: Total number of compositions: 66 [2023-09-01 14:53:52,021 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 14:53:52,026 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;@2a2bb90c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 14:53:52,026 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 14:53:52,030 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-09-01 14:53:52,031 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:53:52,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:53:52,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:53:52,032 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 14:53:52,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:53:52,036 INFO L85 PathProgramCache]: Analyzing trace with hash -69252771, now seen corresponding path program 1 times [2023-09-01 14:53:52,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:53:52,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078327057] [2023-09-01 14:53:52,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:53:52,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:53:52,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:53:52,632 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 14:53:52,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:53:52,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078327057] [2023-09-01 14:53:52,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078327057] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:53:52,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:53:52,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:53:52,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520333726] [2023-09-01 14:53:52,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:53:52,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 14:53:52,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:53:52,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 14:53:52,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-09-01 14:53:52,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-09-01 14:53:52,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 61.857142857142854) internal successors, (433), 7 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:52,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:53:52,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-09-01 14:53:52,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:53:52,906 INFO L130 PetriNetUnfolder]: 58/106 cut-off events. [2023-09-01 14:53:52,906 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-09-01 14:53:52,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 106 events. 58/106 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 248 event pairs, 11 based on Foata normal form. 1/81 useless extension candidates. Maximal degree in co-relation 180. Up to 48 conditions per place. [2023-09-01 14:53:52,908 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 26 selfloop transitions, 10 changer transitions 5/41 dead transitions. [2023-09-01 14:53:52,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 41 transitions, 185 flow [2023-09-01 14:53:52,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 14:53:52,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 14:53:52,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 462 transitions. [2023-09-01 14:53:52,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2023-09-01 14:53:52,935 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 462 transitions. [2023-09-01 14:53:52,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 462 transitions. [2023-09-01 14:53:52,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:53:52,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 462 transitions. [2023-09-01 14:53:52,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.0) internal successors, (462), 7 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:52,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:52,947 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:52,949 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 7 states and 462 transitions. [2023-09-01 14:53:52,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 41 transitions, 185 flow [2023-09-01 14:53:52,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 41 transitions, 171 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 14:53:52,953 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 101 flow [2023-09-01 14:53:52,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=101, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2023-09-01 14:53:52,957 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-09-01 14:53:52,958 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 101 flow [2023-09-01 14:53:52,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 61.857142857142854) internal successors, (433), 7 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:52,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:53:52,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:53:52,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 14:53:52,959 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 14:53:52,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:53:52,960 INFO L85 PathProgramCache]: Analyzing trace with hash 758171711, now seen corresponding path program 2 times [2023-09-01 14:53:52,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:53:52,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028646149] [2023-09-01 14:53:52,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:53:52,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:53:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:53:53,136 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 14:53:53,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:53:53,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028646149] [2023-09-01 14:53:53,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028646149] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:53:53,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:53:53,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:53:53,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746578958] [2023-09-01 14:53:53,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:53:53,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 14:53:53,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:53:53,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 14:53:53,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-09-01 14:53:53,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-09-01 14:53:53,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 101 flow. Second operand has 7 states, 7 states have (on average 61.857142857142854) internal successors, (433), 7 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:53,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:53:53,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-09-01 14:53:53,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:53:53,367 INFO L130 PetriNetUnfolder]: 96/166 cut-off events. [2023-09-01 14:53:53,368 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2023-09-01 14:53:53,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 166 events. 96/166 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 476 event pairs, 11 based on Foata normal form. 1/167 useless extension candidates. Maximal degree in co-relation 499. Up to 69 conditions per place. [2023-09-01 14:53:53,370 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 39 selfloop transitions, 14 changer transitions 5/58 dead transitions. [2023-09-01 14:53:53,370 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 58 transitions, 333 flow [2023-09-01 14:53:53,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 14:53:53,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 14:53:53,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 470 transitions. [2023-09-01 14:53:53,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45675413022351796 [2023-09-01 14:53:53,373 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 470 transitions. [2023-09-01 14:53:53,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 470 transitions. [2023-09-01 14:53:53,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:53:53,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 470 transitions. [2023-09-01 14:53:53,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 67.14285714285714) internal successors, (470), 7 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:53,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:53,378 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:53,378 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 101 flow. Second operand 7 states and 470 transitions. [2023-09-01 14:53:53,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 58 transitions, 333 flow [2023-09-01 14:53:53,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 58 transitions, 325 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 14:53:53,381 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 198 flow [2023-09-01 14:53:53,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=198, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2023-09-01 14:53:53,382 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 16 predicate places. [2023-09-01 14:53:53,382 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 198 flow [2023-09-01 14:53:53,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 61.857142857142854) internal successors, (433), 7 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:53,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:53:53,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:53:53,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 14:53:53,383 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 14:53:53,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:53:53,384 INFO L85 PathProgramCache]: Analyzing trace with hash 649780581, now seen corresponding path program 3 times [2023-09-01 14:53:53,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:53:53,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78453212] [2023-09-01 14:53:53,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:53:53,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:53:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:53:53,547 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 14:53:53,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:53:53,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78453212] [2023-09-01 14:53:53,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78453212] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:53:53,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:53:53,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:53:53,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191479671] [2023-09-01 14:53:53,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:53:53,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 14:53:53,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:53:53,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 14:53:53,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-09-01 14:53:53,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 147 [2023-09-01 14:53:53,618 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 60.857142857142854) internal successors, (426), 7 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:53,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:53:53,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 147 [2023-09-01 14:53:53,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:53:53,752 INFO L130 PetriNetUnfolder]: 112/190 cut-off events. [2023-09-01 14:53:53,753 INFO L131 PetriNetUnfolder]: For 270/270 co-relation queries the response was YES. [2023-09-01 14:53:53,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768 conditions, 190 events. 112/190 cut-off events. For 270/270 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 533 event pairs, 12 based on Foata normal form. 1/191 useless extension candidates. Maximal degree in co-relation 752. Up to 108 conditions per place. [2023-09-01 14:53:53,755 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 33 selfloop transitions, 21 changer transitions 6/60 dead transitions. [2023-09-01 14:53:53,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 60 transitions, 460 flow [2023-09-01 14:53:53,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 14:53:53,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 14:53:53,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 454 transitions. [2023-09-01 14:53:53,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412050534499514 [2023-09-01 14:53:53,758 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 454 transitions. [2023-09-01 14:53:53,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 454 transitions. [2023-09-01 14:53:53,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:53:53,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 454 transitions. [2023-09-01 14:53:53,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:53,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:53,762 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:53,762 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 198 flow. Second operand 7 states and 454 transitions. [2023-09-01 14:53:53,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 60 transitions, 460 flow [2023-09-01 14:53:53,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 60 transitions, 423 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-09-01 14:53:53,766 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 331 flow [2023-09-01 14:53:53,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=331, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-09-01 14:53:53,767 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 23 predicate places. [2023-09-01 14:53:53,767 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 331 flow [2023-09-01 14:53:53,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 60.857142857142854) internal successors, (426), 7 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:53,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:53:53,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:53:53,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 14:53:53,769 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 14:53:53,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:53:53,769 INFO L85 PathProgramCache]: Analyzing trace with hash -96540297, now seen corresponding path program 4 times [2023-09-01 14:53:53,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:53:53,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696191270] [2023-09-01 14:53:53,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:53:53,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:53:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:53:53,922 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 14:53:53,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:53:53,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696191270] [2023-09-01 14:53:53,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696191270] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:53:53,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:53:53,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:53:53,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102902174] [2023-09-01 14:53:53,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:53:53,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 14:53:53,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:53:53,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 14:53:53,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-09-01 14:53:54,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-09-01 14:53:54,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 331 flow. Second operand has 7 states, 7 states have (on average 61.857142857142854) internal successors, (433), 7 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:54,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:53:54,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-09-01 14:53:54,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:53:54,132 INFO L130 PetriNetUnfolder]: 115/197 cut-off events. [2023-09-01 14:53:54,133 INFO L131 PetriNetUnfolder]: For 399/399 co-relation queries the response was YES. [2023-09-01 14:53:54,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 870 conditions, 197 events. 115/197 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 587 event pairs, 11 based on Foata normal form. 1/198 useless extension candidates. Maximal degree in co-relation 851. Up to 116 conditions per place. [2023-09-01 14:53:54,147 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 38 selfloop transitions, 23 changer transitions 5/66 dead transitions. [2023-09-01 14:53:54,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 66 transitions, 553 flow [2023-09-01 14:53:54,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 14:53:54,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 14:53:54,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 467 transitions. [2023-09-01 14:53:54,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45383867832847424 [2023-09-01 14:53:54,150 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 467 transitions. [2023-09-01 14:53:54,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 467 transitions. [2023-09-01 14:53:54,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:53:54,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 467 transitions. [2023-09-01 14:53:54,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.71428571428571) internal successors, (467), 7 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:54,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:54,153 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:54,153 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 331 flow. Second operand 7 states and 467 transitions. [2023-09-01 14:53:54,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 66 transitions, 553 flow [2023-09-01 14:53:54,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 66 transitions, 527 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-09-01 14:53:54,157 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 410 flow [2023-09-01 14:53:54,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=410, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2023-09-01 14:53:54,158 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2023-09-01 14:53:54,158 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 410 flow [2023-09-01 14:53:54,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 61.857142857142854) internal successors, (433), 7 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:54,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:53:54,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:53:54,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 14:53:54,160 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 14:53:54,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:53:54,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1023964675, now seen corresponding path program 5 times [2023-09-01 14:53:54,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:53:54,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922808156] [2023-09-01 14:53:54,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:53:54,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:53:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:53:54,274 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 14:53:54,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:53:54,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922808156] [2023-09-01 14:53:54,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922808156] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:53:54,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:53:54,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:53:54,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677321277] [2023-09-01 14:53:54,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:53:54,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 14:53:54,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:53:54,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 14:53:54,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-09-01 14:53:54,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 147 [2023-09-01 14:53:54,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 410 flow. Second operand has 7 states, 7 states have (on average 60.857142857142854) internal successors, (426), 7 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:54,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:53:54,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 147 [2023-09-01 14:53:54,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:53:54,441 INFO L130 PetriNetUnfolder]: 121/207 cut-off events. [2023-09-01 14:53:54,441 INFO L131 PetriNetUnfolder]: For 559/559 co-relation queries the response was YES. [2023-09-01 14:53:54,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1012 conditions, 207 events. 121/207 cut-off events. For 559/559 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 638 event pairs, 8 based on Foata normal form. 1/208 useless extension candidates. Maximal degree in co-relation 990. Up to 123 conditions per place. [2023-09-01 14:53:54,444 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 40 selfloop transitions, 28 changer transitions 5/73 dead transitions. [2023-09-01 14:53:54,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 73 transitions, 708 flow [2023-09-01 14:53:54,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 14:53:54,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 14:53:54,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 456 transitions. [2023-09-01 14:53:54,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44314868804664725 [2023-09-01 14:53:54,446 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 456 transitions. [2023-09-01 14:53:54,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 456 transitions. [2023-09-01 14:53:54,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:53:54,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 456 transitions. [2023-09-01 14:53:54,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 65.14285714285714) internal successors, (456), 7 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:54,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:54,449 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:54,449 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 410 flow. Second operand 7 states and 456 transitions. [2023-09-01 14:53:54,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 73 transitions, 708 flow [2023-09-01 14:53:54,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 73 transitions, 646 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-09-01 14:53:54,454 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 530 flow [2023-09-01 14:53:54,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=530, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2023-09-01 14:53:54,455 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 35 predicate places. [2023-09-01 14:53:54,455 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 530 flow [2023-09-01 14:53:54,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 60.857142857142854) internal successors, (426), 7 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:54,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:53:54,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:53:54,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 14:53:54,456 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 14:53:54,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:53:54,457 INFO L85 PathProgramCache]: Analyzing trace with hash -232545019, now seen corresponding path program 6 times [2023-09-01 14:53:54,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:53:54,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379289089] [2023-09-01 14:53:54,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:53:54,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:53:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:53:54,565 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 14:53:54,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:53:54,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379289089] [2023-09-01 14:53:54,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379289089] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:53:54,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:53:54,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:53:54,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956725209] [2023-09-01 14:53:54,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:53:54,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 14:53:54,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:53:54,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 14:53:54,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-09-01 14:53:54,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-09-01 14:53:54,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 530 flow. Second operand has 7 states, 7 states have (on average 61.857142857142854) internal successors, (433), 7 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:54,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:53:54,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-09-01 14:53:54,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:53:54,758 INFO L130 PetriNetUnfolder]: 126/216 cut-off events. [2023-09-01 14:53:54,758 INFO L131 PetriNetUnfolder]: For 795/795 co-relation queries the response was YES. [2023-09-01 14:53:54,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1113 conditions, 216 events. 126/216 cut-off events. For 795/795 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 654 event pairs, 18 based on Foata normal form. 1/217 useless extension candidates. Maximal degree in co-relation 1088. Up to 130 conditions per place. [2023-09-01 14:53:54,760 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 41 selfloop transitions, 29 changer transitions 5/75 dead transitions. [2023-09-01 14:53:54,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 75 transitions, 781 flow [2023-09-01 14:53:54,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 14:53:54,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 14:53:54,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 465 transitions. [2023-09-01 14:53:54,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4518950437317784 [2023-09-01 14:53:54,762 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 465 transitions. [2023-09-01 14:53:54,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 465 transitions. [2023-09-01 14:53:54,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:53:54,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 465 transitions. [2023-09-01 14:53:54,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.42857142857143) internal successors, (465), 7 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:54,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:54,766 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:54,766 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 530 flow. Second operand 7 states and 465 transitions. [2023-09-01 14:53:54,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 75 transitions, 781 flow [2023-09-01 14:53:54,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 75 transitions, 741 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-09-01 14:53:54,771 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 613 flow [2023-09-01 14:53:54,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=613, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2023-09-01 14:53:54,772 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 42 predicate places. [2023-09-01 14:53:54,773 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 613 flow [2023-09-01 14:53:54,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 61.857142857142854) internal successors, (433), 7 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:54,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:53:54,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:53:54,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 14:53:54,774 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 14:53:54,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:53:54,774 INFO L85 PathProgramCache]: Analyzing trace with hash 2077625246, now seen corresponding path program 1 times [2023-09-01 14:53:54,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:53:54,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509623678] [2023-09-01 14:53:54,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:53:54,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:53:54,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:53:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:53:54,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:53:54,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509623678] [2023-09-01 14:53:54,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509623678] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:53:54,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986594936] [2023-09-01 14:53:54,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:53:54,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:53:54,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:53:54,817 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 14:53:54,823 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 14:53:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:53:54,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 14:53:54,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:53:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:53:54,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:53:54,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:53:54,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986594936] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 14:53:54,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 14:53:54,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2023-09-01 14:53:54,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219692663] [2023-09-01 14:53:54,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:53:55,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:53:55,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:53:55,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:53:55,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-09-01 14:53:55,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-09-01 14:53:55,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 613 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:55,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:53:55,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-09-01 14:53:55,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:53:55,166 INFO L130 PetriNetUnfolder]: 131/230 cut-off events. [2023-09-01 14:53:55,166 INFO L131 PetriNetUnfolder]: For 1083/1083 co-relation queries the response was YES. [2023-09-01 14:53:55,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1252 conditions, 230 events. 131/230 cut-off events. For 1083/1083 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 750 event pairs, 10 based on Foata normal form. 8/238 useless extension candidates. Maximal degree in co-relation 1221. Up to 102 conditions per place. [2023-09-01 14:53:55,169 INFO L137 encePairwiseOnDemand]: 142/147 looper letters, 62 selfloop transitions, 18 changer transitions 0/80 dead transitions. [2023-09-01 14:53:55,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 80 transitions, 891 flow [2023-09-01 14:53:55,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:53:55,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:53:55,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 340 transitions. [2023-09-01 14:53:55,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2023-09-01 14:53:55,171 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 340 transitions. [2023-09-01 14:53:55,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 340 transitions. [2023-09-01 14:53:55,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:53:55,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 340 transitions. [2023-09-01 14:53:55,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:55,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:55,173 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:55,173 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 613 flow. Second operand 5 states and 340 transitions. [2023-09-01 14:53:55,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 80 transitions, 891 flow [2023-09-01 14:53:55,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 80 transitions, 815 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-09-01 14:53:55,179 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 627 flow [2023-09-01 14:53:55,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=627, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2023-09-01 14:53:55,180 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 43 predicate places. [2023-09-01 14:53:55,180 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 627 flow [2023-09-01 14:53:55,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:55,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:53:55,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:53:55,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 14:53:55,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:53:55,387 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 14:53:55,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:53:55,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1451445671, now seen corresponding path program 1 times [2023-09-01 14:53:55,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:53:55,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549296541] [2023-09-01 14:53:55,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:53:55,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:53:55,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:53:55,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:53:55,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:53:55,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549296541] [2023-09-01 14:53:55,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549296541] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:53:55,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:53:55,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:53:55,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446238308] [2023-09-01 14:53:55,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:53:55,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:53:55,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:53:55,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:53:55,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:53:55,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-09-01 14:53:55,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 627 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:55,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:53:55,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-09-01 14:53:55,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:53:55,552 INFO L130 PetriNetUnfolder]: 127/226 cut-off events. [2023-09-01 14:53:55,552 INFO L131 PetriNetUnfolder]: For 1366/1366 co-relation queries the response was YES. [2023-09-01 14:53:55,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1268 conditions, 226 events. 127/226 cut-off events. For 1366/1366 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 733 event pairs, 16 based on Foata normal form. 4/230 useless extension candidates. Maximal degree in co-relation 1104. Up to 90 conditions per place. [2023-09-01 14:53:55,555 INFO L137 encePairwiseOnDemand]: 141/147 looper letters, 49 selfloop transitions, 28 changer transitions 4/81 dead transitions. [2023-09-01 14:53:55,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 81 transitions, 873 flow [2023-09-01 14:53:55,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 14:53:55,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 14:53:55,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 466 transitions. [2023-09-01 14:53:55,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45286686103012636 [2023-09-01 14:53:55,557 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 466 transitions. [2023-09-01 14:53:55,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 466 transitions. [2023-09-01 14:53:55,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:53:55,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 466 transitions. [2023-09-01 14:53:55,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:55,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:55,561 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:55,561 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 627 flow. Second operand 7 states and 466 transitions. [2023-09-01 14:53:55,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 81 transitions, 873 flow [2023-09-01 14:53:55,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 81 transitions, 830 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-09-01 14:53:55,572 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 639 flow [2023-09-01 14:53:55,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=639, PETRI_PLACES=67, PETRI_TRANSITIONS=59} [2023-09-01 14:53:55,575 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 47 predicate places. [2023-09-01 14:53:55,575 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 639 flow [2023-09-01 14:53:55,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:55,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:53:55,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:53:55,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 14:53:55,576 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 14:53:55,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:53:55,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1729374333, now seen corresponding path program 2 times [2023-09-01 14:53:55,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:53:55,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892982242] [2023-09-01 14:53:55,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:53:55,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:53:55,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:53:55,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:53:55,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:53:55,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892982242] [2023-09-01 14:53:55,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892982242] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:53:55,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:53:55,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:53:55,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297265016] [2023-09-01 14:53:55,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:53:55,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:53:55,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:53:55,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:53:55,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:53:55,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-09-01 14:53:55,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 639 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:55,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:53:55,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-09-01 14:53:55,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:53:55,780 INFO L130 PetriNetUnfolder]: 133/236 cut-off events. [2023-09-01 14:53:55,780 INFO L131 PetriNetUnfolder]: For 1381/1381 co-relation queries the response was YES. [2023-09-01 14:53:55,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1358 conditions, 236 events. 133/236 cut-off events. For 1381/1381 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 757 event pairs, 23 based on Foata normal form. 4/240 useless extension candidates. Maximal degree in co-relation 1261. Up to 133 conditions per place. [2023-09-01 14:53:55,782 INFO L137 encePairwiseOnDemand]: 142/147 looper letters, 62 selfloop transitions, 18 changer transitions 0/80 dead transitions. [2023-09-01 14:53:55,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 80 transitions, 916 flow [2023-09-01 14:53:55,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:53:55,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:53:55,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 343 transitions. [2023-09-01 14:53:55,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-09-01 14:53:55,784 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 343 transitions. [2023-09-01 14:53:55,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 343 transitions. [2023-09-01 14:53:55,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:53:55,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 343 transitions. [2023-09-01 14:53:55,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 68.6) internal successors, (343), 5 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:55,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:55,787 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:55,787 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 639 flow. Second operand 5 states and 343 transitions. [2023-09-01 14:53:55,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 80 transitions, 916 flow [2023-09-01 14:53:55,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 80 transitions, 837 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-09-01 14:53:55,795 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 639 flow [2023-09-01 14:53:55,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=639, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2023-09-01 14:53:55,796 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 46 predicate places. [2023-09-01 14:53:55,797 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 639 flow [2023-09-01 14:53:55,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:55,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:53:55,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:53:55,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 14:53:55,798 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 14:53:55,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:53:55,798 INFO L85 PathProgramCache]: Analyzing trace with hash 2096697363, now seen corresponding path program 3 times [2023-09-01 14:53:55,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:53:55,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265638046] [2023-09-01 14:53:55,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:53:55,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:53:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:53:55,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:53:55,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:53:55,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265638046] [2023-09-01 14:53:55,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265638046] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:53:55,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:53:55,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:53:55,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123353631] [2023-09-01 14:53:55,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:53:55,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:53:55,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:53:55,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:53:55,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:53:55,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-09-01 14:53:55,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 639 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:55,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:53:55,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-09-01 14:53:55,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:53:55,978 INFO L130 PetriNetUnfolder]: 128/231 cut-off events. [2023-09-01 14:53:55,978 INFO L131 PetriNetUnfolder]: For 1179/1179 co-relation queries the response was YES. [2023-09-01 14:53:55,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1298 conditions, 231 events. 128/231 cut-off events. For 1179/1179 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 749 event pairs, 16 based on Foata normal form. 4/235 useless extension candidates. Maximal degree in co-relation 1179. Up to 92 conditions per place. [2023-09-01 14:53:55,980 INFO L137 encePairwiseOnDemand]: 141/147 looper letters, 58 selfloop transitions, 28 changer transitions 3/89 dead transitions. [2023-09-01 14:53:55,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 89 transitions, 942 flow [2023-09-01 14:53:55,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 14:53:55,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 14:53:55,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 535 transitions. [2023-09-01 14:53:55,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4549319727891156 [2023-09-01 14:53:55,983 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 535 transitions. [2023-09-01 14:53:55,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 535 transitions. [2023-09-01 14:53:55,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:53:55,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 535 transitions. [2023-09-01 14:53:55,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 66.875) internal successors, (535), 8 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:55,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 147.0) internal successors, (1323), 9 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:55,986 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 147.0) internal successors, (1323), 9 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:55,987 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 639 flow. Second operand 8 states and 535 transitions. [2023-09-01 14:53:55,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 89 transitions, 942 flow [2023-09-01 14:53:55,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 89 transitions, 908 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-09-01 14:53:55,994 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 676 flow [2023-09-01 14:53:55,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=676, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2023-09-01 14:53:55,995 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 51 predicate places. [2023-09-01 14:53:55,995 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 676 flow [2023-09-01 14:53:55,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:55,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:53:55,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:53:55,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 14:53:55,996 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 14:53:55,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:53:55,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1833085128, now seen corresponding path program 2 times [2023-09-01 14:53:55,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:53:55,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717648079] [2023-09-01 14:53:55,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:53:55,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:53:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:53:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:53:56,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:53:56,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717648079] [2023-09-01 14:53:56,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717648079] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:53:56,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:53:56,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:53:56,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820662476] [2023-09-01 14:53:56,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:53:56,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:53:56,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:53:56,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:53:56,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:53:56,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-09-01 14:53:56,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 676 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:56,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:53:56,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-09-01 14:53:56,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:53:56,147 INFO L130 PetriNetUnfolder]: 145/268 cut-off events. [2023-09-01 14:53:56,148 INFO L131 PetriNetUnfolder]: For 1492/1492 co-relation queries the response was YES. [2023-09-01 14:53:56,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1520 conditions, 268 events. 145/268 cut-off events. For 1492/1492 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 935 event pairs, 10 based on Foata normal form. 4/272 useless extension candidates. Maximal degree in co-relation 1445. Up to 103 conditions per place. [2023-09-01 14:53:56,150 INFO L137 encePairwiseOnDemand]: 141/147 looper letters, 56 selfloop transitions, 26 changer transitions 1/83 dead transitions. [2023-09-01 14:53:56,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 83 transitions, 989 flow [2023-09-01 14:53:56,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 14:53:56,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 14:53:56,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 401 transitions. [2023-09-01 14:53:56,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4546485260770975 [2023-09-01 14:53:56,152 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 401 transitions. [2023-09-01 14:53:56,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 401 transitions. [2023-09-01 14:53:56,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:53:56,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 401 transitions. [2023-09-01 14:53:56,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.83333333333333) internal successors, (401), 6 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:56,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 147.0) internal successors, (1029), 7 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:56,165 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 147.0) internal successors, (1029), 7 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:56,165 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 676 flow. Second operand 6 states and 401 transitions. [2023-09-01 14:53:56,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 83 transitions, 989 flow [2023-09-01 14:53:56,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 83 transitions, 931 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-09-01 14:53:56,172 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 767 flow [2023-09-01 14:53:56,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=767, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2023-09-01 14:53:56,173 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 55 predicate places. [2023-09-01 14:53:56,173 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 767 flow [2023-09-01 14:53:56,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:56,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:53:56,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:53:56,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 14:53:56,174 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 14:53:56,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:53:56,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1631307914, now seen corresponding path program 3 times [2023-09-01 14:53:56,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:53:56,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058017766] [2023-09-01 14:53:56,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:53:56,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:53:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:53:56,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:53:56,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:53:56,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058017766] [2023-09-01 14:53:56,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058017766] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:53:56,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181824665] [2023-09-01 14:53:56,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:53:56,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:53:56,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:53:56,215 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 14:53:56,240 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 14:53:56,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:53:56,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:53:56,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 14:53:56,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:53:56,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:53:56,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:53:56,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:53:56,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181824665] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 14:53:56,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 14:53:56,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2023-09-01 14:53:56,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317856428] [2023-09-01 14:53:56,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:53:56,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:53:56,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:53:56,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:53:56,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-09-01 14:53:56,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-09-01 14:53:56,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 767 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:56,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:53:56,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-09-01 14:53:56,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:53:56,450 INFO L130 PetriNetUnfolder]: 150/281 cut-off events. [2023-09-01 14:53:56,450 INFO L131 PetriNetUnfolder]: For 1865/1865 co-relation queries the response was YES. [2023-09-01 14:53:56,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1609 conditions, 281 events. 150/281 cut-off events. For 1865/1865 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1012 event pairs, 6 based on Foata normal form. 6/287 useless extension candidates. Maximal degree in co-relation 1535. Up to 163 conditions per place. [2023-09-01 14:53:56,453 INFO L137 encePairwiseOnDemand]: 140/147 looper letters, 54 selfloop transitions, 29 changer transitions 0/83 dead transitions. [2023-09-01 14:53:56,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 83 transitions, 1014 flow [2023-09-01 14:53:56,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:53:56,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:53:56,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 340 transitions. [2023-09-01 14:53:56,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2023-09-01 14:53:56,455 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 340 transitions. [2023-09-01 14:53:56,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 340 transitions. [2023-09-01 14:53:56,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:53:56,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 340 transitions. [2023-09-01 14:53:56,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:56,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:56,458 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:56,458 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 767 flow. Second operand 5 states and 340 transitions. [2023-09-01 14:53:56,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 83 transitions, 1014 flow [2023-09-01 14:53:56,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 83 transitions, 945 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-09-01 14:53:56,469 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 819 flow [2023-09-01 14:53:56,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=819, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2023-09-01 14:53:56,470 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 56 predicate places. [2023-09-01 14:53:56,470 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 819 flow [2023-09-01 14:53:56,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:56,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:53:56,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:53:56,479 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 14:53:56,679 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,SelfDestructingSolverStorable11 [2023-09-01 14:53:56,679 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 14:53:56,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:53:56,680 INFO L85 PathProgramCache]: Analyzing trace with hash 199479147, now seen corresponding path program 4 times [2023-09-01 14:53:56,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:53:56,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281119694] [2023-09-01 14:53:56,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:53:56,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:53:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:53:56,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:53:56,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:53:56,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281119694] [2023-09-01 14:53:56,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281119694] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:53:56,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314389153] [2023-09-01 14:53:56,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:53:56,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:53:56,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:53:56,713 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 14:53:56,721 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 14:53:56,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:53:56,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:53:56,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 14:53:56,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:53:56,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:53:56,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:53:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:53:56,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314389153] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 14:53:56,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 14:53:56,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2023-09-01 14:53:56,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027075454] [2023-09-01 14:53:56,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:53:56,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:53:56,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:53:56,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:53:56,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-09-01 14:53:56,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-09-01 14:53:56,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 819 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:56,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:53:56,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-09-01 14:53:56,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:53:56,951 INFO L130 PetriNetUnfolder]: 159/310 cut-off events. [2023-09-01 14:53:56,951 INFO L131 PetriNetUnfolder]: For 2376/2376 co-relation queries the response was YES. [2023-09-01 14:53:56,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1809 conditions, 310 events. 159/310 cut-off events. For 2376/2376 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1194 event pairs, 10 based on Foata normal form. 6/316 useless extension candidates. Maximal degree in co-relation 1720. Up to 160 conditions per place. [2023-09-01 14:53:56,954 INFO L137 encePairwiseOnDemand]: 142/147 looper letters, 63 selfloop transitions, 22 changer transitions 0/85 dead transitions. [2023-09-01 14:53:56,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 85 transitions, 1111 flow [2023-09-01 14:53:56,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:53:56,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:53:56,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 336 transitions. [2023-09-01 14:53:56,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2023-09-01 14:53:56,956 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 336 transitions. [2023-09-01 14:53:56,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 336 transitions. [2023-09-01 14:53:56,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:53:56,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 336 transitions. [2023-09-01 14:53:56,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 67.2) internal successors, (336), 5 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:56,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:56,959 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:56,959 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 819 flow. Second operand 5 states and 336 transitions. [2023-09-01 14:53:56,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 85 transitions, 1111 flow [2023-09-01 14:53:56,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 85 transitions, 1098 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 14:53:56,969 INFO L231 Difference]: Finished difference. Result has 81 places, 69 transitions, 906 flow [2023-09-01 14:53:56,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=906, PETRI_PLACES=81, PETRI_TRANSITIONS=69} [2023-09-01 14:53:56,970 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 61 predicate places. [2023-09-01 14:53:56,970 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 69 transitions, 906 flow [2023-09-01 14:53:56,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:56,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:53:56,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:53:56,979 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 14:53:57,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:53:57,176 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 14:53:57,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:53:57,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1851774549, now seen corresponding path program 5 times [2023-09-01 14:53:57,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:53:57,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709920157] [2023-09-01 14:53:57,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:53:57,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:53:57,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:53:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:53:57,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:53:57,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709920157] [2023-09-01 14:53:57,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709920157] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:53:57,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:53:57,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:53:57,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575694842] [2023-09-01 14:53:57,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:53:57,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:53:57,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:53:57,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:53:57,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:53:57,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-09-01 14:53:57,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 69 transitions, 906 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:57,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:53:57,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-09-01 14:53:57,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:53:57,361 INFO L130 PetriNetUnfolder]: 145/286 cut-off events. [2023-09-01 14:53:57,361 INFO L131 PetriNetUnfolder]: For 2486/2486 co-relation queries the response was YES. [2023-09-01 14:53:57,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1783 conditions, 286 events. 145/286 cut-off events. For 2486/2486 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1079 event pairs, 10 based on Foata normal form. 8/294 useless extension candidates. Maximal degree in co-relation 1686. Up to 115 conditions per place. [2023-09-01 14:53:57,364 INFO L137 encePairwiseOnDemand]: 141/147 looper letters, 60 selfloop transitions, 25 changer transitions 1/86 dead transitions. [2023-09-01 14:53:57,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 86 transitions, 1172 flow [2023-09-01 14:53:57,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 14:53:57,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 14:53:57,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 401 transitions. [2023-09-01 14:53:57,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4546485260770975 [2023-09-01 14:53:57,366 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 401 transitions. [2023-09-01 14:53:57,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 401 transitions. [2023-09-01 14:53:57,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:53:57,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 401 transitions. [2023-09-01 14:53:57,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.83333333333333) internal successors, (401), 6 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:57,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 147.0) internal successors, (1029), 7 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:57,369 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 147.0) internal successors, (1029), 7 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:57,369 INFO L175 Difference]: Start difference. First operand has 81 places, 69 transitions, 906 flow. Second operand 6 states and 401 transitions. [2023-09-01 14:53:57,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 86 transitions, 1172 flow [2023-09-01 14:53:57,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 86 transitions, 1128 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-09-01 14:53:57,378 INFO L231 Difference]: Finished difference. Result has 84 places, 68 transitions, 915 flow [2023-09-01 14:53:57,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=915, PETRI_PLACES=84, PETRI_TRANSITIONS=68} [2023-09-01 14:53:57,379 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 64 predicate places. [2023-09-01 14:53:57,379 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 68 transitions, 915 flow [2023-09-01 14:53:57,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:57,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:53:57,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:53:57,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 14:53:57,380 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 14:53:57,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:53:57,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1933318608, now seen corresponding path program 4 times [2023-09-01 14:53:57,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:53:57,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877188876] [2023-09-01 14:53:57,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:53:57,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:53:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:53:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:53:57,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:53:57,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877188876] [2023-09-01 14:53:57,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877188876] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:53:57,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663174002] [2023-09-01 14:53:57,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:53:57,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:53:57,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:53:57,412 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 14:53:57,414 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 14:53:57,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:53:57,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:53:57,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 14:53:57,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:53:57,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:53:57,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:53:57,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:53:57,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663174002] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 14:53:57,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 14:53:57,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2023-09-01 14:53:57,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500875088] [2023-09-01 14:53:57,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:53:57,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:53:57,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:53:57,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:53:57,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-09-01 14:53:57,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-09-01 14:53:57,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 68 transitions, 915 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:57,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:53:57,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-09-01 14:53:57,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:53:57,624 INFO L130 PetriNetUnfolder]: 139/272 cut-off events. [2023-09-01 14:53:57,624 INFO L131 PetriNetUnfolder]: For 2565/2565 co-relation queries the response was YES. [2023-09-01 14:53:57,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1736 conditions, 272 events. 139/272 cut-off events. For 2565/2565 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 998 event pairs, 23 based on Foata normal form. 6/278 useless extension candidates. Maximal degree in co-relation 1618. Up to 145 conditions per place. [2023-09-01 14:53:57,627 INFO L137 encePairwiseOnDemand]: 140/147 looper letters, 58 selfloop transitions, 31 changer transitions 0/89 dead transitions. [2023-09-01 14:53:57,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 89 transitions, 1175 flow [2023-09-01 14:53:57,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 14:53:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 14:53:57,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 408 transitions. [2023-09-01 14:53:57,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2023-09-01 14:53:57,629 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 408 transitions. [2023-09-01 14:53:57,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 408 transitions. [2023-09-01 14:53:57,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:53:57,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 408 transitions. [2023-09-01 14:53:57,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 68.0) internal successors, (408), 6 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:57,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 147.0) internal successors, (1029), 7 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:57,632 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 147.0) internal successors, (1029), 7 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:57,632 INFO L175 Difference]: Start difference. First operand has 84 places, 68 transitions, 915 flow. Second operand 6 states and 408 transitions. [2023-09-01 14:53:57,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 89 transitions, 1175 flow [2023-09-01 14:53:57,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 89 transitions, 1152 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-09-01 14:53:57,641 INFO L231 Difference]: Finished difference. Result has 86 places, 69 transitions, 967 flow [2023-09-01 14:53:57,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=967, PETRI_PLACES=86, PETRI_TRANSITIONS=69} [2023-09-01 14:53:57,641 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 66 predicate places. [2023-09-01 14:53:57,642 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 69 transitions, 967 flow [2023-09-01 14:53:57,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:57,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:53:57,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:53:57,652 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 14:53:57,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 14:53:57,850 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 14:53:57,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:53:57,850 INFO L85 PathProgramCache]: Analyzing trace with hash 58117330, now seen corresponding path program 5 times [2023-09-01 14:53:57,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:53:57,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32571524] [2023-09-01 14:53:57,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:53:57,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:53:57,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:53:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:53:57,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:53:57,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32571524] [2023-09-01 14:53:57,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32571524] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:53:57,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:53:57,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:53:57,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37904138] [2023-09-01 14:53:57,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:53:57,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:53:57,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:53:57,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:53:57,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:53:57,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-09-01 14:53:57,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 69 transitions, 967 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:57,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:53:57,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-09-01 14:53:57,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:53:58,009 INFO L130 PetriNetUnfolder]: 137/270 cut-off events. [2023-09-01 14:53:58,009 INFO L131 PetriNetUnfolder]: For 2647/2647 co-relation queries the response was YES. [2023-09-01 14:53:58,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1787 conditions, 270 events. 137/270 cut-off events. For 2647/2647 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 994 event pairs, 27 based on Foata normal form. 2/272 useless extension candidates. Maximal degree in co-relation 1721. Up to 101 conditions per place. [2023-09-01 14:53:58,012 INFO L137 encePairwiseOnDemand]: 141/147 looper letters, 54 selfloop transitions, 27 changer transitions 2/83 dead transitions. [2023-09-01 14:53:58,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 83 transitions, 1184 flow [2023-09-01 14:53:58,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 14:53:58,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 14:53:58,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 461 transitions. [2023-09-01 14:53:58,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4480077745383868 [2023-09-01 14:53:58,014 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 461 transitions. [2023-09-01 14:53:58,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 461 transitions. [2023-09-01 14:53:58,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:53:58,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 461 transitions. [2023-09-01 14:53:58,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 65.85714285714286) internal successors, (461), 7 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:58,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:58,021 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:58,021 INFO L175 Difference]: Start difference. First operand has 86 places, 69 transitions, 967 flow. Second operand 7 states and 461 transitions. [2023-09-01 14:53:58,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 83 transitions, 1184 flow [2023-09-01 14:53:58,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 83 transitions, 1138 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-09-01 14:53:58,032 INFO L231 Difference]: Finished difference. Result has 90 places, 66 transitions, 932 flow [2023-09-01 14:53:58,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=932, PETRI_PLACES=90, PETRI_TRANSITIONS=66} [2023-09-01 14:53:58,033 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 70 predicate places. [2023-09-01 14:53:58,033 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 66 transitions, 932 flow [2023-09-01 14:53:58,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:58,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:53:58,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:53:58,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-09-01 14:53:58,034 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 14:53:58,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:53:58,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1486589744, now seen corresponding path program 6 times [2023-09-01 14:53:58,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:53:58,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461390175] [2023-09-01 14:53:58,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:53:58,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:53:58,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:53:58,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:53:58,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:53:58,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461390175] [2023-09-01 14:53:58,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461390175] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:53:58,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:53:58,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:53:58,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817676644] [2023-09-01 14:53:58,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:53:58,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:53:58,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:53:58,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:53:58,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:53:58,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-09-01 14:53:58,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 66 transitions, 932 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:58,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:53:58,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-09-01 14:53:58,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:53:58,245 INFO L130 PetriNetUnfolder]: 131/252 cut-off events. [2023-09-01 14:53:58,245 INFO L131 PetriNetUnfolder]: For 2667/2667 co-relation queries the response was YES. [2023-09-01 14:53:58,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1703 conditions, 252 events. 131/252 cut-off events. For 2667/2667 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 891 event pairs, 23 based on Foata normal form. 2/254 useless extension candidates. Maximal degree in co-relation 1659. Up to 101 conditions per place. [2023-09-01 14:53:58,248 INFO L137 encePairwiseOnDemand]: 141/147 looper letters, 55 selfloop transitions, 27 changer transitions 1/83 dead transitions. [2023-09-01 14:53:58,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 83 transitions, 1156 flow [2023-09-01 14:53:58,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 14:53:58,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 14:53:58,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 527 transitions. [2023-09-01 14:53:58,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481292517006803 [2023-09-01 14:53:58,250 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 527 transitions. [2023-09-01 14:53:58,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 527 transitions. [2023-09-01 14:53:58,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:53:58,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 527 transitions. [2023-09-01 14:53:58,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 65.875) internal successors, (527), 8 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:58,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 147.0) internal successors, (1323), 9 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:58,253 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 147.0) internal successors, (1323), 9 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:58,254 INFO L175 Difference]: Start difference. First operand has 90 places, 66 transitions, 932 flow. Second operand 8 states and 527 transitions. [2023-09-01 14:53:58,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 83 transitions, 1156 flow [2023-09-01 14:53:58,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 83 transitions, 1106 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-09-01 14:53:58,272 INFO L231 Difference]: Finished difference. Result has 92 places, 63 transitions, 888 flow [2023-09-01 14:53:58,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=888, PETRI_PLACES=92, PETRI_TRANSITIONS=63} [2023-09-01 14:53:58,273 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2023-09-01 14:53:58,273 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 63 transitions, 888 flow [2023-09-01 14:53:58,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:58,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:53:58,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:53:58,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-09-01 14:53:58,274 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 14:53:58,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:53:58,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1093501371, now seen corresponding path program 6 times [2023-09-01 14:53:58,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:53:58,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926945075] [2023-09-01 14:53:58,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:53:58,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:53:58,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:53:58,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:53:58,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:53:58,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926945075] [2023-09-01 14:53:58,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926945075] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:53:58,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:53:58,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:53:58,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877941391] [2023-09-01 14:53:58,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:53:58,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:53:58,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:53:58,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:53:58,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:53:58,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-09-01 14:53:58,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 63 transitions, 888 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:58,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:53:58,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-09-01 14:53:58,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:53:58,420 INFO L130 PetriNetUnfolder]: 125/236 cut-off events. [2023-09-01 14:53:58,420 INFO L131 PetriNetUnfolder]: For 2604/2604 co-relation queries the response was YES. [2023-09-01 14:53:58,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1628 conditions, 236 events. 125/236 cut-off events. For 2604/2604 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 783 event pairs, 10 based on Foata normal form. 4/240 useless extension candidates. Maximal degree in co-relation 1461. Up to 173 conditions per place. [2023-09-01 14:53:58,423 INFO L137 encePairwiseOnDemand]: 142/147 looper letters, 50 selfloop transitions, 18 changer transitions 0/68 dead transitions. [2023-09-01 14:53:58,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 68 transitions, 1010 flow [2023-09-01 14:53:58,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:53:58,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:53:58,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 330 transitions. [2023-09-01 14:53:58,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2023-09-01 14:53:58,425 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 330 transitions. [2023-09-01 14:53:58,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 330 transitions. [2023-09-01 14:53:58,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:53:58,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 330 transitions. [2023-09-01 14:53:58,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:58,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:58,427 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:58,427 INFO L175 Difference]: Start difference. First operand has 92 places, 63 transitions, 888 flow. Second operand 5 states and 330 transitions. [2023-09-01 14:53:58,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 68 transitions, 1010 flow [2023-09-01 14:53:58,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 68 transitions, 950 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-09-01 14:53:58,434 INFO L231 Difference]: Finished difference. Result has 85 places, 61 transitions, 815 flow [2023-09-01 14:53:58,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=815, PETRI_PLACES=85, PETRI_TRANSITIONS=61} [2023-09-01 14:53:58,435 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 65 predicate places. [2023-09-01 14:53:58,435 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 61 transitions, 815 flow [2023-09-01 14:53:58,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:58,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:53:58,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:53:58,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-09-01 14:53:58,436 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 14:53:58,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:53:58,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1299106536, now seen corresponding path program 1 times [2023-09-01 14:53:58,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:53:58,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037377125] [2023-09-01 14:53:58,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:53:58,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:53:58,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:53:58,552 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 14:53:58,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:53:58,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037377125] [2023-09-01 14:53:58,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037377125] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:53:58,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326331518] [2023-09-01 14:53:58,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:53:58,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:53:58,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:53:58,555 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 14:53:58,557 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 14:53:58,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:53:58,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 14:53:58,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:53:58,723 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 14:53:58,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:53:59,056 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 14:53:59,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326331518] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:53:59,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:53:59,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-09-01 14:53:59,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090132300] [2023-09-01 14:53:59,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:53:59,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 14:53:59,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:53:59,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 14:53:59,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-09-01 14:53:59,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 147 [2023-09-01 14:53:59,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 61 transitions, 815 flow. Second operand has 18 states, 18 states have (on average 58.94444444444444) internal successors, (1061), 18 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:59,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:53:59,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 147 [2023-09-01 14:53:59,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:53:59,520 INFO L130 PetriNetUnfolder]: 125/235 cut-off events. [2023-09-01 14:53:59,520 INFO L131 PetriNetUnfolder]: For 2124/2124 co-relation queries the response was YES. [2023-09-01 14:53:59,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1574 conditions, 235 events. 125/235 cut-off events. For 2124/2124 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 793 event pairs, 2 based on Foata normal form. 1/236 useless extension candidates. Maximal degree in co-relation 1359. Up to 51 conditions per place. [2023-09-01 14:53:59,523 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 42 selfloop transitions, 22 changer transitions 27/91 dead transitions. [2023-09-01 14:53:59,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 91 transitions, 1145 flow [2023-09-01 14:53:59,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 14:53:59,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 14:53:59,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 686 transitions. [2023-09-01 14:53:59,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2023-09-01 14:53:59,527 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 686 transitions. [2023-09-01 14:53:59,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 686 transitions. [2023-09-01 14:53:59,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:53:59,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 686 transitions. [2023-09-01 14:53:59,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 62.36363636363637) internal successors, (686), 11 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:59,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:59,531 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:59,532 INFO L175 Difference]: Start difference. First operand has 85 places, 61 transitions, 815 flow. Second operand 11 states and 686 transitions. [2023-09-01 14:53:59,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 91 transitions, 1145 flow [2023-09-01 14:53:59,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 91 transitions, 1120 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 14:53:59,539 INFO L231 Difference]: Finished difference. Result has 94 places, 48 transitions, 666 flow [2023-09-01 14:53:59,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=666, PETRI_PLACES=94, PETRI_TRANSITIONS=48} [2023-09-01 14:53:59,540 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 74 predicate places. [2023-09-01 14:53:59,540 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 48 transitions, 666 flow [2023-09-01 14:53:59,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.94444444444444) internal successors, (1061), 18 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:53:59,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:53:59,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:53:59,553 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 14:53:59,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:53:59,746 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 14:53:59,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:53:59,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1701107400, now seen corresponding path program 2 times [2023-09-01 14:53:59,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:53:59,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115612842] [2023-09-01 14:53:59,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:53:59,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:53:59,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:53:59,945 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 14:53:59,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:53:59,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115612842] [2023-09-01 14:53:59,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115612842] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:53:59,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508010303] [2023-09-01 14:53:59,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:53:59,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:53:59,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:53:59,947 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 14:53:59,967 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 14:54:00,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:54:00,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:54:00,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 14:54:00,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:54:00,148 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 14:54:00,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:54:00,405 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 14:54:00,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508010303] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:54:00,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:54:00,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2023-09-01 14:54:00,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184789839] [2023-09-01 14:54:00,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:54:00,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 14:54:00,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:54:00,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 14:54:00,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-09-01 14:54:00,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 147 [2023-09-01 14:54:00,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 48 transitions, 666 flow. Second operand has 20 states, 20 states have (on average 55.8) internal successors, (1116), 20 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:00,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:54:00,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 147 [2023-09-01 14:54:00,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:54:00,911 INFO L130 PetriNetUnfolder]: 96/188 cut-off events. [2023-09-01 14:54:00,911 INFO L131 PetriNetUnfolder]: For 1913/1913 co-relation queries the response was YES. [2023-09-01 14:54:00,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1293 conditions, 188 events. 96/188 cut-off events. For 1913/1913 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 580 event pairs, 2 based on Foata normal form. 1/189 useless extension candidates. Maximal degree in co-relation 1258. Up to 46 conditions per place. [2023-09-01 14:54:00,913 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 46 selfloop transitions, 27 changer transitions 9/82 dead transitions. [2023-09-01 14:54:00,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 82 transitions, 1049 flow [2023-09-01 14:54:00,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 14:54:00,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 14:54:00,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 652 transitions. [2023-09-01 14:54:00,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40321583178726034 [2023-09-01 14:54:00,916 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 652 transitions. [2023-09-01 14:54:00,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 652 transitions. [2023-09-01 14:54:00,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:54:00,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 652 transitions. [2023-09-01 14:54:00,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 59.27272727272727) internal successors, (652), 11 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:00,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:00,920 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:00,920 INFO L175 Difference]: Start difference. First operand has 94 places, 48 transitions, 666 flow. Second operand 11 states and 652 transitions. [2023-09-01 14:54:00,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 82 transitions, 1049 flow [2023-09-01 14:54:00,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 82 transitions, 837 flow, removed 15 selfloop flow, removed 20 redundant places. [2023-09-01 14:54:00,927 INFO L231 Difference]: Finished difference. Result has 79 places, 51 transitions, 593 flow [2023-09-01 14:54:00,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=593, PETRI_PLACES=79, PETRI_TRANSITIONS=51} [2023-09-01 14:54:00,928 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 59 predicate places. [2023-09-01 14:54:00,928 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 51 transitions, 593 flow [2023-09-01 14:54:00,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 55.8) internal successors, (1116), 20 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:00,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:54:00,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:54:00,936 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 14:54:01,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:54:01,135 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 14:54:01,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:54:01,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1717886460, now seen corresponding path program 3 times [2023-09-01 14:54:01,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:54:01,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286786589] [2023-09-01 14:54:01,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:54:01,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:54:01,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:54:01,308 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 14:54:01,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:54:01,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286786589] [2023-09-01 14:54:01,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286786589] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:54:01,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304771829] [2023-09-01 14:54:01,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:54:01,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:54:01,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:54:01,310 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 14:54:01,336 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 14:54:01,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 14:54:01,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:54:01,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 14:54:01,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:54:01,504 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 14:54:01,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:54:01,741 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 14:54:01,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304771829] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:54:01,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:54:01,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-09-01 14:54:01,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915143151] [2023-09-01 14:54:01,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:54:01,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 14:54:01,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:54:01,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 14:54:01,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-09-01 14:54:01,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 147 [2023-09-01 14:54:01,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 51 transitions, 593 flow. Second operand has 19 states, 19 states have (on average 58.421052631578945) internal successors, (1110), 19 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:01,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:54:01,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 147 [2023-09-01 14:54:01,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:54:02,196 INFO L130 PetriNetUnfolder]: 90/183 cut-off events. [2023-09-01 14:54:02,196 INFO L131 PetriNetUnfolder]: For 1103/1103 co-relation queries the response was YES. [2023-09-01 14:54:02,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1111 conditions, 183 events. 90/183 cut-off events. For 1103/1103 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 572 event pairs, 2 based on Foata normal form. 2/185 useless extension candidates. Maximal degree in co-relation 1079. Up to 45 conditions per place. [2023-09-01 14:54:02,197 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 34 selfloop transitions, 16 changer transitions 26/76 dead transitions. [2023-09-01 14:54:02,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 76 transitions, 870 flow [2023-09-01 14:54:02,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 14:54:02,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 14:54:02,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 679 transitions. [2023-09-01 14:54:02,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199134199134199 [2023-09-01 14:54:02,202 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 679 transitions. [2023-09-01 14:54:02,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 679 transitions. [2023-09-01 14:54:02,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:54:02,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 679 transitions. [2023-09-01 14:54:02,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 61.72727272727273) internal successors, (679), 11 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:02,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:02,205 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:02,205 INFO L175 Difference]: Start difference. First operand has 79 places, 51 transitions, 593 flow. Second operand 11 states and 679 transitions. [2023-09-01 14:54:02,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 76 transitions, 870 flow [2023-09-01 14:54:02,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 76 transitions, 793 flow, removed 13 selfloop flow, removed 8 redundant places. [2023-09-01 14:54:02,211 INFO L231 Difference]: Finished difference. Result has 80 places, 39 transitions, 422 flow [2023-09-01 14:54:02,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=422, PETRI_PLACES=80, PETRI_TRANSITIONS=39} [2023-09-01 14:54:02,212 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 60 predicate places. [2023-09-01 14:54:02,212 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 39 transitions, 422 flow [2023-09-01 14:54:02,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.421052631578945) internal successors, (1110), 19 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:02,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:54:02,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:54:02,225 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 14:54:02,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:54:02,423 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 14:54:02,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:54:02,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1577916472, now seen corresponding path program 4 times [2023-09-01 14:54:02,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:54:02,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771640071] [2023-09-01 14:54:02,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:54:02,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:54:02,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:54:02,555 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 14:54:02,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:54:02,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771640071] [2023-09-01 14:54:02,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771640071] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:54:02,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209334347] [2023-09-01 14:54:02,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:54:02,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:54:02,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:54:02,557 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 14:54:02,572 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 14:54:02,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:54:02,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:54:02,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 14:54:02,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:54:02,737 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 14:54:02,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:54:02,979 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 14:54:02,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209334347] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:54:02,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:54:02,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-09-01 14:54:02,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609534723] [2023-09-01 14:54:02,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:54:02,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 14:54:02,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:54:02,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 14:54:02,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-09-01 14:54:03,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 147 [2023-09-01 14:54:03,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 39 transitions, 422 flow. Second operand has 19 states, 19 states have (on average 58.421052631578945) internal successors, (1110), 19 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:03,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:54:03,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 147 [2023-09-01 14:54:03,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:54:03,703 INFO L130 PetriNetUnfolder]: 81/179 cut-off events. [2023-09-01 14:54:03,704 INFO L131 PetriNetUnfolder]: For 977/977 co-relation queries the response was YES. [2023-09-01 14:54:03,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1029 conditions, 179 events. 81/179 cut-off events. For 977/977 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 589 event pairs, 1 based on Foata normal form. 3/182 useless extension candidates. Maximal degree in co-relation 998. Up to 41 conditions per place. [2023-09-01 14:54:03,706 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 38 selfloop transitions, 28 changer transitions 18/84 dead transitions. [2023-09-01 14:54:03,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 84 transitions, 899 flow [2023-09-01 14:54:03,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 14:54:03,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 14:54:03,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1042 transitions. [2023-09-01 14:54:03,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169667867146859 [2023-09-01 14:54:03,708 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1042 transitions. [2023-09-01 14:54:03,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1042 transitions. [2023-09-01 14:54:03,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:54:03,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1042 transitions. [2023-09-01 14:54:03,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 61.294117647058826) internal successors, (1042), 17 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:03,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 147.0) internal successors, (2646), 18 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:03,714 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 147.0) internal successors, (2646), 18 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:03,714 INFO L175 Difference]: Start difference. First operand has 80 places, 39 transitions, 422 flow. Second operand 17 states and 1042 transitions. [2023-09-01 14:54:03,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 84 transitions, 899 flow [2023-09-01 14:54:03,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 84 transitions, 795 flow, removed 9 selfloop flow, removed 12 redundant places. [2023-09-01 14:54:03,718 INFO L231 Difference]: Finished difference. Result has 82 places, 48 transitions, 535 flow [2023-09-01 14:54:03,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=535, PETRI_PLACES=82, PETRI_TRANSITIONS=48} [2023-09-01 14:54:03,719 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 62 predicate places. [2023-09-01 14:54:03,719 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 48 transitions, 535 flow [2023-09-01 14:54:03,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.421052631578945) internal successors, (1110), 19 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:03,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:54:03,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:54:03,731 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 14:54:03,921 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,SelfDestructingSolverStorable21 [2023-09-01 14:54:03,921 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 14:54:03,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:54:03,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1858770940, now seen corresponding path program 5 times [2023-09-01 14:54:03,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:54:03,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814377228] [2023-09-01 14:54:03,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:54:03,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:54:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:54:04,076 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 14:54:04,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:54:04,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814377228] [2023-09-01 14:54:04,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814377228] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:54:04,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666003271] [2023-09-01 14:54:04,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:54:04,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:54:04,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:54:04,081 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 14:54:04,110 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 14:54:04,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:54:04,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:54:04,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 14:54:04,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:54:04,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:54:04,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 14:54:04,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666003271] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:54:04,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 14:54:04,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-09-01 14:54:04,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601820527] [2023-09-01 14:54:04,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:54:04,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 14:54:04,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:54:04,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 14:54:04,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-09-01 14:54:04,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 147 [2023-09-01 14:54:04,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 48 transitions, 535 flow. Second operand has 7 states, 7 states have (on average 63.142857142857146) internal successors, (442), 7 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:04,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:54:04,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 147 [2023-09-01 14:54:04,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:54:04,349 INFO L130 PetriNetUnfolder]: 72/142 cut-off events. [2023-09-01 14:54:04,350 INFO L131 PetriNetUnfolder]: For 834/834 co-relation queries the response was YES. [2023-09-01 14:54:04,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 861 conditions, 142 events. 72/142 cut-off events. For 834/834 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 391 event pairs, 8 based on Foata normal form. 1/143 useless extension candidates. Maximal degree in co-relation 834. Up to 45 conditions per place. [2023-09-01 14:54:04,351 INFO L137 encePairwiseOnDemand]: 141/147 looper letters, 28 selfloop transitions, 9 changer transitions 21/58 dead transitions. [2023-09-01 14:54:04,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 58 transitions, 698 flow [2023-09-01 14:54:04,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 14:54:04,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 14:54:04,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 459 transitions. [2023-09-01 14:54:04,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446064139941691 [2023-09-01 14:54:04,353 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 459 transitions. [2023-09-01 14:54:04,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 459 transitions. [2023-09-01 14:54:04,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:54:04,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 459 transitions. [2023-09-01 14:54:04,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 65.57142857142857) internal successors, (459), 7 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:04,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:04,355 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:04,356 INFO L175 Difference]: Start difference. First operand has 82 places, 48 transitions, 535 flow. Second operand 7 states and 459 transitions. [2023-09-01 14:54:04,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 58 transitions, 698 flow [2023-09-01 14:54:04,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 58 transitions, 589 flow, removed 19 selfloop flow, removed 10 redundant places. [2023-09-01 14:54:04,359 INFO L231 Difference]: Finished difference. Result has 75 places, 34 transitions, 313 flow [2023-09-01 14:54:04,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=313, PETRI_PLACES=75, PETRI_TRANSITIONS=34} [2023-09-01 14:54:04,360 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 55 predicate places. [2023-09-01 14:54:04,360 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 34 transitions, 313 flow [2023-09-01 14:54:04,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 63.142857142857146) internal successors, (442), 7 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:04,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:54:04,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:54:04,369 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 14:54:04,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:54:04,566 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 14:54:04,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:54:04,567 INFO L85 PathProgramCache]: Analyzing trace with hash 2082091444, now seen corresponding path program 6 times [2023-09-01 14:54:04,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:54:04,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520486992] [2023-09-01 14:54:04,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:54:04,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:54:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:54:04,692 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 14:54:04,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:54:04,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520486992] [2023-09-01 14:54:04,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520486992] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:54:04,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103787993] [2023-09-01 14:54:04,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:54:04,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:54:04,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:54:04,695 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 14:54:04,721 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 14:54:04,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 14:54:04,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:54:04,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 14:54:04,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:54:04,889 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 14:54:04,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:54:05,170 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 14:54:05,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103787993] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:54:05,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:54:05,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-09-01 14:54:05,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512584787] [2023-09-01 14:54:05,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:54:05,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 14:54:05,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:54:05,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 14:54:05,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-09-01 14:54:05,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 147 [2023-09-01 14:54:05,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 34 transitions, 313 flow. Second operand has 19 states, 19 states have (on average 58.73684210526316) internal successors, (1116), 19 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:05,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:54:05,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 147 [2023-09-01 14:54:05,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:54:05,869 INFO L130 PetriNetUnfolder]: 54/123 cut-off events. [2023-09-01 14:54:05,869 INFO L131 PetriNetUnfolder]: For 494/494 co-relation queries the response was YES. [2023-09-01 14:54:05,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 123 events. 54/123 cut-off events. For 494/494 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 346 event pairs, 1 based on Foata normal form. 2/125 useless extension candidates. Maximal degree in co-relation 621. Up to 23 conditions per place. [2023-09-01 14:54:05,870 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 24 selfloop transitions, 17 changer transitions 28/69 dead transitions. [2023-09-01 14:54:05,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 69 transitions, 589 flow [2023-09-01 14:54:05,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 14:54:05,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 14:54:05,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1035 transitions. [2023-09-01 14:54:05,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4141656662665066 [2023-09-01 14:54:05,873 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1035 transitions. [2023-09-01 14:54:05,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1035 transitions. [2023-09-01 14:54:05,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:54:05,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1035 transitions. [2023-09-01 14:54:05,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 60.88235294117647) internal successors, (1035), 17 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:05,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 147.0) internal successors, (2646), 18 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:05,878 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 147.0) internal successors, (2646), 18 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:05,878 INFO L175 Difference]: Start difference. First operand has 75 places, 34 transitions, 313 flow. Second operand 17 states and 1035 transitions. [2023-09-01 14:54:05,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 69 transitions, 589 flow [2023-09-01 14:54:05,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 514 flow, removed 9 selfloop flow, removed 13 redundant places. [2023-09-01 14:54:05,881 INFO L231 Difference]: Finished difference. Result has 74 places, 30 transitions, 249 flow [2023-09-01 14:54:05,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=249, PETRI_PLACES=74, PETRI_TRANSITIONS=30} [2023-09-01 14:54:05,882 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 54 predicate places. [2023-09-01 14:54:05,882 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 30 transitions, 249 flow [2023-09-01 14:54:05,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.73684210526316) internal successors, (1116), 19 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:05,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:54:05,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:54:05,888 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 14:54:06,088 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,SelfDestructingSolverStorable23 [2023-09-01 14:54:06,089 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 14:54:06,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:54:06,089 INFO L85 PathProgramCache]: Analyzing trace with hash -669051972, now seen corresponding path program 7 times [2023-09-01 14:54:06,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:54:06,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716831852] [2023-09-01 14:54:06,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:54:06,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:54:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:54:06,201 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 14:54:06,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:54:06,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716831852] [2023-09-01 14:54:06,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716831852] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:54:06,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498106206] [2023-09-01 14:54:06,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:54:06,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:54:06,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:54:06,203 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 14:54:06,214 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 14:54:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:54:06,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 14:54:06,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:54:06,357 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 14:54:06,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:54:06,564 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 14:54:06,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498106206] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:54:06,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:54:06,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-09-01 14:54:06,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243085748] [2023-09-01 14:54:06,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:54:06,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 14:54:06,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:54:06,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 14:54:06,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-09-01 14:54:06,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 147 [2023-09-01 14:54:06,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 30 transitions, 249 flow. Second operand has 18 states, 18 states have (on average 58.44444444444444) internal successors, (1052), 18 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:06,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:54:06,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 147 [2023-09-01 14:54:06,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:54:06,858 INFO L130 PetriNetUnfolder]: 36/84 cut-off events. [2023-09-01 14:54:06,858 INFO L131 PetriNetUnfolder]: For 304/304 co-relation queries the response was YES. [2023-09-01 14:54:06,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 423 conditions, 84 events. 36/84 cut-off events. For 304/304 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 177 event pairs, 3 based on Foata normal form. 1/85 useless extension candidates. Maximal degree in co-relation 403. Up to 21 conditions per place. [2023-09-01 14:54:06,859 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 24 selfloop transitions, 13 changer transitions 7/44 dead transitions. [2023-09-01 14:54:06,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 44 transitions, 378 flow [2023-09-01 14:54:06,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 14:54:06,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 14:54:06,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 664 transitions. [2023-09-01 14:54:06,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4106369820655535 [2023-09-01 14:54:06,861 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 664 transitions. [2023-09-01 14:54:06,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 664 transitions. [2023-09-01 14:54:06,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:54:06,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 664 transitions. [2023-09-01 14:54:06,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 60.36363636363637) internal successors, (664), 11 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:06,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:06,865 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:06,865 INFO L175 Difference]: Start difference. First operand has 74 places, 30 transitions, 249 flow. Second operand 11 states and 664 transitions. [2023-09-01 14:54:06,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 44 transitions, 378 flow [2023-09-01 14:54:06,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 44 transitions, 336 flow, removed 5 selfloop flow, removed 13 redundant places. [2023-09-01 14:54:06,867 INFO L231 Difference]: Finished difference. Result has 63 places, 28 transitions, 215 flow [2023-09-01 14:54:06,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=215, PETRI_PLACES=63, PETRI_TRANSITIONS=28} [2023-09-01 14:54:06,868 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 43 predicate places. [2023-09-01 14:54:06,868 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 28 transitions, 215 flow [2023-09-01 14:54:06,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.44444444444444) internal successors, (1052), 18 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:06,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:54:06,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:54:06,877 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 14:54:07,077 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,SelfDestructingSolverStorable24 [2023-09-01 14:54:07,077 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 14:54:07,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:54:07,077 INFO L85 PathProgramCache]: Analyzing trace with hash -685831032, now seen corresponding path program 8 times [2023-09-01 14:54:07,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:54:07,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313414197] [2023-09-01 14:54:07,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:54:07,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:54:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:54:07,233 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 14:54:07,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:54:07,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313414197] [2023-09-01 14:54:07,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313414197] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:54:07,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901996029] [2023-09-01 14:54:07,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:54:07,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:54:07,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:54:07,235 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 14:54:07,260 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 14:54:07,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:54:07,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:54:07,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 14:54:07,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:54:07,431 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 14:54:07,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:54:07,665 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 14:54:07,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901996029] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:54:07,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:54:07,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2023-09-01 14:54:07,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895209201] [2023-09-01 14:54:07,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:54:07,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 14:54:07,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:54:07,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 14:54:07,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-09-01 14:54:07,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 147 [2023-09-01 14:54:07,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 28 transitions, 215 flow. Second operand has 20 states, 20 states have (on average 55.8) internal successors, (1116), 20 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:07,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:54:07,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 147 [2023-09-01 14:54:07,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:54:08,085 INFO L130 PetriNetUnfolder]: 34/74 cut-off events. [2023-09-01 14:54:08,085 INFO L131 PetriNetUnfolder]: For 252/252 co-relation queries the response was YES. [2023-09-01 14:54:08,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 74 events. 34/74 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 145 event pairs, 3 based on Foata normal form. 1/75 useless extension candidates. Maximal degree in co-relation 345. Up to 21 conditions per place. [2023-09-01 14:54:08,086 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 0 selfloop transitions, 0 changer transitions 36/36 dead transitions. [2023-09-01 14:54:08,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 36 transitions, 312 flow [2023-09-01 14:54:08,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 14:54:08,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 14:54:08,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 515 transitions. [2023-09-01 14:54:08,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892668178382464 [2023-09-01 14:54:08,088 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 515 transitions. [2023-09-01 14:54:08,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 515 transitions. [2023-09-01 14:54:08,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:54:08,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 515 transitions. [2023-09-01 14:54:08,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.22222222222222) internal successors, (515), 9 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:08,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 147.0) internal successors, (1470), 10 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:08,091 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 147.0) internal successors, (1470), 10 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:08,091 INFO L175 Difference]: Start difference. First operand has 63 places, 28 transitions, 215 flow. Second operand 9 states and 515 transitions. [2023-09-01 14:54:08,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 36 transitions, 312 flow [2023-09-01 14:54:08,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 36 transitions, 285 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-09-01 14:54:08,093 INFO L231 Difference]: Finished difference. Result has 59 places, 0 transitions, 0 flow [2023-09-01 14:54:08,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=59, PETRI_TRANSITIONS=0} [2023-09-01 14:54:08,093 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 39 predicate places. [2023-09-01 14:54:08,093 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 0 transitions, 0 flow [2023-09-01 14:54:08,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 55.8) internal successors, (1116), 20 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:54:08,095 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-09-01 14:54:08,096 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-09-01 14:54:08,096 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-09-01 14:54:08,104 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 14:54:08,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-09-01 14:54:08,297 INFO L445 BasicCegarLoop]: Path program histogram: [8, 6, 6, 6] [2023-09-01 14:54:08,299 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-09-01 14:54:08,299 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-09-01 14:54:08,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.09 02:54:08 BasicIcfg [2023-09-01 14:54:08,301 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-09-01 14:54:08,302 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-09-01 14:54:08,302 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-09-01 14:54:08,302 INFO L275 PluginConnector]: Witness Printer initialized [2023-09-01 14:54:08,302 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:53:49" (3/4) ... [2023-09-01 14:54:08,305 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-09-01 14:54:08,309 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-09-01 14:54:08,310 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-09-01 14:54:08,312 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2023-09-01 14:54:08,312 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-09-01 14:54:08,313 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-09-01 14:54:08,313 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-09-01 14:54:08,341 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-09-01 14:54:08,341 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-09-01 14:54:08,342 INFO L158 Benchmark]: Toolchain (without parser) took 19117.70ms. Allocated memory was 90.2MB in the beginning and 192.9MB in the end (delta: 102.8MB). Free memory was 70.4MB in the beginning and 129.2MB in the end (delta: -58.8MB). Peak memory consumption was 44.2MB. Max. memory is 16.1GB. [2023-09-01 14:54:08,342 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 62.9MB. Free memory is still 40.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 14:54:08,342 INFO L158 Benchmark]: CACSL2BoogieTranslator took 240.36ms. Allocated memory is still 90.2MB. Free memory was 70.2MB in the beginning and 59.3MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 14:54:08,343 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.68ms. Allocated memory is still 90.2MB. Free memory was 59.3MB in the beginning and 57.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 14:54:08,343 INFO L158 Benchmark]: Boogie Preprocessor took 39.14ms. Allocated memory is still 90.2MB. Free memory was 57.7MB in the beginning and 56.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 14:54:08,343 INFO L158 Benchmark]: RCFGBuilder took 406.80ms. Allocated memory is still 90.2MB. Free memory was 56.3MB in the beginning and 68.2MB in the end (delta: -11.9MB). Peak memory consumption was 12.1MB. Max. memory is 16.1GB. [2023-09-01 14:54:08,344 INFO L158 Benchmark]: TraceAbstraction took 18354.05ms. Allocated memory was 90.2MB in the beginning and 192.9MB in the end (delta: 102.8MB). Free memory was 67.1MB in the beginning and 132.4MB in the end (delta: -65.3MB). Peak memory consumption was 36.3MB. Max. memory is 16.1GB. [2023-09-01 14:54:08,344 INFO L158 Benchmark]: Witness Printer took 39.80ms. Allocated memory is still 192.9MB. Free memory was 132.4MB in the beginning and 129.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-09-01 14:54:08,348 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 62.9MB. Free memory is still 40.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 240.36ms. Allocated memory is still 90.2MB. Free memory was 70.2MB in the beginning and 59.3MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.68ms. Allocated memory is still 90.2MB. Free memory was 59.3MB in the beginning and 57.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.14ms. Allocated memory is still 90.2MB. Free memory was 57.7MB in the beginning and 56.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 406.80ms. Allocated memory is still 90.2MB. Free memory was 56.3MB in the beginning and 68.2MB in the end (delta: -11.9MB). Peak memory consumption was 12.1MB. Max. memory is 16.1GB. * TraceAbstraction took 18354.05ms. Allocated memory was 90.2MB in the beginning and 192.9MB in the end (delta: 102.8MB). Free memory was 67.1MB in the beginning and 132.4MB in the end (delta: -65.3MB). Peak memory consumption was 36.3MB. Max. memory is 16.1GB. * Witness Printer took 39.80ms. Allocated memory is still 192.9MB. Free memory was 132.4MB in the beginning and 129.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.9s, 72 PlacesBefore, 20 PlacesAfterwards, 71 TransitionsBefore, 15 TransitionsAfterwards, 572 CoEnabledTransitionPairs, 6 FixpointIterations, 34 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 66 TotalNumberOfCompositions, 581 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 552, independent: 540, independent conditional: 0, independent unconditional: 540, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 305, independent: 303, independent conditional: 0, independent unconditional: 303, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 552, independent: 237, independent conditional: 0, independent unconditional: 237, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 305, unknown conditional: 0, unknown unconditional: 305] , Statistics on independence cache: Total cache size (in pairs): 20, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 79]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 98 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 18.2s, OverallIterations: 26, TraceHistogramMax: 1, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 7.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2519 SdHoareTripleChecker+Valid, 4.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2075 mSDsluCounter, 2280 SdHoareTripleChecker+Invalid, 3.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2077 mSDsCounter, 284 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8386 IncrementalHoareTripleChecker+Invalid, 8670 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 284 mSolverCounterUnsat, 203 mSDtfsCounter, 8386 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 581 GetRequests, 253 SyntacticMatches, 34 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=967occurred in iteration=15, InterpolantAutomatonStates: 209, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.4s InterpolantComputationTime, 542 NumberOfCodeBlocks, 542 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 654 ConstructedInterpolants, 0 QuantifiedInterpolants, 4322 SizeOfPredicates, 34 NumberOfNonLiveVariables, 1428 ConjunctsInSsa, 159 ConjunctsInUnsatCore, 49 InterpolantComputations, 19 PerfectInterpolantSequences, 14/66 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-09-01 14:54:08,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE