./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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 ../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:40:25,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:40:25,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:40:25,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:40:25,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:40:25,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:40:25,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:40:25,450 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:40:25,452 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:40:25,458 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:40:25,459 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:40:25,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:40:25,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:40:25,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:40:25,464 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:40:25,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:40:25,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:40:25,470 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:40:25,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:40:25,474 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:40:25,478 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:40:25,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:40:25,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:40:25,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:40:25,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:40:25,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:40:25,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:40:25,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:40:25,485 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:40:25,486 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:40:25,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:40:25,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:40:25,487 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:40:25,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:40:25,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:40:25,489 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:40:25,490 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:40:25,490 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:40:25,491 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:40:25,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:40:25,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:40:25,495 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:40:25,496 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:40:25,532 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:40:25,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:40:25,533 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:40:25,533 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:40:25,534 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:40:25,534 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:40:25,534 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:40:25,535 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:40:25,535 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:40:25,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:40:25,536 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:40:25,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:40:25,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:40:25,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:40:25,537 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:40:25,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:40:25,537 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:40:25,537 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:40:25,537 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:40:25,538 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:40:25,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:40:25,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:40:25,538 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:40:25,538 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:40:25,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:40:25,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:40:25,539 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:40:25,539 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:40:25,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:40:25,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:40:25,540 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:40:25,540 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:40:25,540 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:40:25,541 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f [2022-07-19 21:40:25,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:40:25,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:40:25,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:40:25,799 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:40:25,800 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:40:25,801 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-07-19 21:40:25,859 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61da0dd5e/1b03a8fe81894facb136837af8b06269/FLAGa26a3fd39 [2022-07-19 21:40:26,300 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:40:26,300 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-07-19 21:40:26,308 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61da0dd5e/1b03a8fe81894facb136837af8b06269/FLAGa26a3fd39 [2022-07-19 21:40:26,322 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61da0dd5e/1b03a8fe81894facb136837af8b06269 [2022-07-19 21:40:26,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:40:26,327 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:40:26,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:40:26,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:40:26,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:40:26,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:40:26" (1/1) ... [2022-07-19 21:40:26,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5365666d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:26, skipping insertion in model container [2022-07-19 21:40:26,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:40:26" (1/1) ... [2022-07-19 21:40:26,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:40:26,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:40:26,501 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-07-19 21:40:26,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:40:26,510 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:40:26,526 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-07-19 21:40:26,527 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:40:26,538 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:40:26,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:26 WrapperNode [2022-07-19 21:40:26,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:40:26,540 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:40:26,540 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:40:26,540 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:40:26,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:26" (1/1) ... [2022-07-19 21:40:26,554 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:26" (1/1) ... [2022-07-19 21:40:26,575 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2022-07-19 21:40:26,576 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:40:26,577 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:40:26,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:40:26,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:40:26,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:26" (1/1) ... [2022-07-19 21:40:26,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:26" (1/1) ... [2022-07-19 21:40:26,587 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:26" (1/1) ... [2022-07-19 21:40:26,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:26" (1/1) ... [2022-07-19 21:40:26,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:26" (1/1) ... [2022-07-19 21:40:26,608 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:26" (1/1) ... [2022-07-19 21:40:26,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:26" (1/1) ... [2022-07-19 21:40:26,610 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:40:26,611 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:40:26,611 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:40:26,611 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:40:26,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:26" (1/1) ... [2022-07-19 21:40:26,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:40:26,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:26,649 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) [2022-07-19 21:40:26,650 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 [2022-07-19 21:40:26,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:40:26,682 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:40:26,682 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:40:26,683 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:40:26,683 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:40:26,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:40:26,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:40:26,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:40:26,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:40:26,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:40:26,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:40:26,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:40:26,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:40:26,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:40:26,685 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:40:26,776 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:40:26,778 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:40:26,962 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:40:26,989 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:40:26,989 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 21:40:26,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:40:26 BoogieIcfgContainer [2022-07-19 21:40:26,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:40:26,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:40:26,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:40:26,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:40:26,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:40:26" (1/3) ... [2022-07-19 21:40:26,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6292109f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:40:26, skipping insertion in model container [2022-07-19 21:40:26,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:26" (2/3) ... [2022-07-19 21:40:26,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6292109f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:40:26, skipping insertion in model container [2022-07-19 21:40:26,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:40:26" (3/3) ... [2022-07-19 21:40:26,999 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2022-07-19 21:40:27,003 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:40:27,011 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:40:27,012 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:40:27,012 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:40:27,047 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:40:27,075 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 87 places, 86 transitions, 188 flow [2022-07-19 21:40:27,109 INFO L129 PetriNetUnfolder]: 6/84 cut-off events. [2022-07-19 21:40:27,110 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:40:27,112 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 84 events. 6/84 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-07-19 21:40:27,113 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 86 transitions, 188 flow [2022-07-19 21:40:27,125 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 75 transitions, 162 flow [2022-07-19 21:40:27,134 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:40:27,140 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1fe767ed, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3e0b223f [2022-07-19 21:40:27,141 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 21:40:27,169 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2022-07-19 21:40:27,169 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:40:27,170 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:27,170 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:27,171 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:40:27,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:27,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1565492451, now seen corresponding path program 1 times [2022-07-19 21:40:27,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:27,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101360305] [2022-07-19 21:40:27,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:27,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:27,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:27,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:27,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101360305] [2022-07-19 21:40:27,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101360305] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:40:27,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:40:27,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:40:27,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919564647] [2022-07-19 21:40:27,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:27,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:40:27,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:27,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:40:27,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:40:27,378 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 86 [2022-07-19 21:40:27,381 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 162 flow. Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:27,381 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:27,381 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 86 [2022-07-19 21:40:27,382 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:27,418 INFO L129 PetriNetUnfolder]: 10/97 cut-off events. [2022-07-19 21:40:27,418 INFO L130 PetriNetUnfolder]: For 18/19 co-relation queries the response was YES. [2022-07-19 21:40:27,419 INFO L84 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 97 events. 10/97 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 106 event pairs, 1 based on Foata normal form. 11/98 useless extension candidates. Maximal degree in co-relation 55. Up to 18 conditions per place. [2022-07-19 21:40:27,421 INFO L132 encePairwiseOnDemand]: 82/86 looper letters, 6 selfloop transitions, 0 changer transitions 2/71 dead transitions. [2022-07-19 21:40:27,421 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 71 transitions, 166 flow [2022-07-19 21:40:27,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:40:27,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:40:27,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 160 transitions. [2022-07-19 21:40:27,432 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9302325581395349 [2022-07-19 21:40:27,433 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 160 transitions. [2022-07-19 21:40:27,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 160 transitions. [2022-07-19 21:40:27,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:27,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 160 transitions. [2022-07-19 21:40:27,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:27,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:27,443 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:27,444 INFO L186 Difference]: Start difference. First operand has 76 places, 75 transitions, 162 flow. Second operand 2 states and 160 transitions. [2022-07-19 21:40:27,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 71 transitions, 166 flow [2022-07-19 21:40:27,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:40:27,450 INFO L242 Difference]: Finished difference. Result has 73 places, 69 transitions, 142 flow [2022-07-19 21:40:27,452 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=142, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2022-07-19 21:40:27,455 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, -3 predicate places. [2022-07-19 21:40:27,456 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 142 flow [2022-07-19 21:40:27,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:27,456 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:27,457 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:27,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:40:27,457 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:40:27,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:27,458 INFO L85 PathProgramCache]: Analyzing trace with hash -707015589, now seen corresponding path program 1 times [2022-07-19 21:40:27,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:27,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851888547] [2022-07-19 21:40:27,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:27,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:27,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:27,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:27,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851888547] [2022-07-19 21:40:27,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851888547] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:40:27,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:40:27,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:40:27,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950745077] [2022-07-19 21:40:27,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:27,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:40:27,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:27,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:40:27,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:40:27,656 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 86 [2022-07-19 21:40:27,657 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 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) [2022-07-19 21:40:27,657 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:27,657 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 86 [2022-07-19 21:40:27,657 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:27,783 INFO L129 PetriNetUnfolder]: 62/188 cut-off events. [2022-07-19 21:40:27,784 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-19 21:40:27,785 INFO L84 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 188 events. 62/188 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 552 event pairs, 26 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 326. Up to 80 conditions per place. [2022-07-19 21:40:27,786 INFO L132 encePairwiseOnDemand]: 80/86 looper letters, 28 selfloop transitions, 5 changer transitions 0/77 dead transitions. [2022-07-19 21:40:27,787 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 77 transitions, 225 flow [2022-07-19 21:40:27,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:40:27,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:40:27,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 358 transitions. [2022-07-19 21:40:27,791 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6937984496124031 [2022-07-19 21:40:27,791 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 358 transitions. [2022-07-19 21:40:27,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 358 transitions. [2022-07-19 21:40:27,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:27,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 358 transitions. [2022-07-19 21:40:27,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 59.666666666666664) internal successors, (358), 6 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:27,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:27,798 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:27,798 INFO L186 Difference]: Start difference. First operand has 73 places, 69 transitions, 142 flow. Second operand 6 states and 358 transitions. [2022-07-19 21:40:27,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 77 transitions, 225 flow [2022-07-19 21:40:27,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 225 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:40:27,801 INFO L242 Difference]: Finished difference. Result has 77 places, 70 transitions, 160 flow [2022-07-19 21:40:27,801 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2022-07-19 21:40:27,802 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 1 predicate places. [2022-07-19 21:40:27,802 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 160 flow [2022-07-19 21:40:27,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 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) [2022-07-19 21:40:27,802 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:27,803 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:27,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:40:27,803 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:40:27,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:27,804 INFO L85 PathProgramCache]: Analyzing trace with hash 334905647, now seen corresponding path program 1 times [2022-07-19 21:40:27,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:27,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581601182] [2022-07-19 21:40:27,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:27,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:27,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:40:27,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:27,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581601182] [2022-07-19 21:40:27,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581601182] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:40:27,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:40:27,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:40:27,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466308483] [2022-07-19 21:40:27,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:27,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:40:27,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:27,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:40:27,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:40:27,986 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 86 [2022-07-19 21:40:27,987 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 59.5) internal successors, (357), 6 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:27,987 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:27,988 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 86 [2022-07-19 21:40:27,988 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:28,101 INFO L129 PetriNetUnfolder]: 44/170 cut-off events. [2022-07-19 21:40:28,101 INFO L130 PetriNetUnfolder]: For 16/22 co-relation queries the response was YES. [2022-07-19 21:40:28,104 INFO L84 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 170 events. 44/170 cut-off events. For 16/22 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 526 event pairs, 23 based on Foata normal form. 6/164 useless extension candidates. Maximal degree in co-relation 297. Up to 70 conditions per place. [2022-07-19 21:40:28,106 INFO L132 encePairwiseOnDemand]: 80/86 looper letters, 24 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2022-07-19 21:40:28,106 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 76 transitions, 233 flow [2022-07-19 21:40:28,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:40:28,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:40:28,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 366 transitions. [2022-07-19 21:40:28,112 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7093023255813954 [2022-07-19 21:40:28,112 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 366 transitions. [2022-07-19 21:40:28,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 366 transitions. [2022-07-19 21:40:28,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:28,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 366 transitions. [2022-07-19 21:40:28,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:28,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:28,118 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:28,118 INFO L186 Difference]: Start difference. First operand has 77 places, 70 transitions, 160 flow. Second operand 6 states and 366 transitions. [2022-07-19 21:40:28,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 76 transitions, 233 flow [2022-07-19 21:40:28,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 76 transitions, 225 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:40:28,123 INFO L242 Difference]: Finished difference. Result has 79 places, 71 transitions, 170 flow [2022-07-19 21:40:28,124 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2022-07-19 21:40:28,126 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 3 predicate places. [2022-07-19 21:40:28,126 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 170 flow [2022-07-19 21:40:28,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.5) internal successors, (357), 6 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:28,127 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:28,127 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:28,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:40:28,128 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:40:28,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:28,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1873075449, now seen corresponding path program 1 times [2022-07-19 21:40:28,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:28,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800713055] [2022-07-19 21:40:28,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:28,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:28,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:28,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:28,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:28,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800713055] [2022-07-19 21:40:28,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800713055] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:28,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499258413] [2022-07-19 21:40:28,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:28,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:28,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:28,511 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) [2022-07-19 21:40:28,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:40:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:28,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:40:28,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:29,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:29,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:40:29,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:29,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499258413] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:40:29,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:40:29,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-19 21:40:29,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633698846] [2022-07-19 21:40:29,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:40:29,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 21:40:29,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:29,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 21:40:29,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 21:40:29,641 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-19 21:40:29,643 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 170 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:29,644 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:29,644 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-19 21:40:29,644 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:32,066 INFO L129 PetriNetUnfolder]: 258/823 cut-off events. [2022-07-19 21:40:32,067 INFO L130 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2022-07-19 21:40:32,069 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1759 conditions, 823 events. 258/823 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4945 event pairs, 2 based on Foata normal form. 4/826 useless extension candidates. Maximal degree in co-relation 1753. Up to 155 conditions per place. [2022-07-19 21:40:32,084 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 134 selfloop transitions, 117 changer transitions 49/341 dead transitions. [2022-07-19 21:40:32,085 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 341 transitions, 1630 flow [2022-07-19 21:40:32,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-19 21:40:32,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-07-19 21:40:32,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3541 transitions. [2022-07-19 21:40:32,094 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6433502906976745 [2022-07-19 21:40:32,095 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3541 transitions. [2022-07-19 21:40:32,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3541 transitions. [2022-07-19 21:40:32,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:32,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3541 transitions. [2022-07-19 21:40:32,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 55.328125) internal successors, (3541), 64 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:32,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:32,120 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:32,120 INFO L186 Difference]: Start difference. First operand has 79 places, 71 transitions, 170 flow. Second operand 64 states and 3541 transitions. [2022-07-19 21:40:32,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 341 transitions, 1630 flow [2022-07-19 21:40:32,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 341 transitions, 1580 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:40:32,129 INFO L242 Difference]: Finished difference. Result has 168 places, 202 transitions, 991 flow [2022-07-19 21:40:32,129 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=991, PETRI_PLACES=168, PETRI_TRANSITIONS=202} [2022-07-19 21:40:32,130 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 92 predicate places. [2022-07-19 21:40:32,130 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 202 transitions, 991 flow [2022-07-19 21:40:32,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:32,131 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:32,132 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:32,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:40:32,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:32,358 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:40:32,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:32,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1569915595, now seen corresponding path program 2 times [2022-07-19 21:40:32,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:32,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081095477] [2022-07-19 21:40:32,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:32,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:32,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:32,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:32,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081095477] [2022-07-19 21:40:32,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081095477] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:32,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825258132] [2022-07-19 21:40:32,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:40:32,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:32,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:32,618 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) [2022-07-19 21:40:32,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:40:32,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:40:32,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:40:32,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:40:32,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:33,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:40:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:33,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825258132] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:40:33,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:40:33,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-19 21:40:33,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306094594] [2022-07-19 21:40:33,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:40:33,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-19 21:40:33,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:33,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-19 21:40:33,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2022-07-19 21:40:33,499 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-19 21:40:33,501 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 202 transitions, 991 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:33,501 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:33,501 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-19 21:40:33,501 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:37,301 INFO L129 PetriNetUnfolder]: 452/1591 cut-off events. [2022-07-19 21:40:37,302 INFO L130 PetriNetUnfolder]: For 3915/3915 co-relation queries the response was YES. [2022-07-19 21:40:37,342 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5255 conditions, 1591 events. 452/1591 cut-off events. For 3915/3915 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11989 event pairs, 43 based on Foata normal form. 9/1595 useless extension candidates. Maximal degree in co-relation 5219. Up to 381 conditions per place. [2022-07-19 21:40:37,350 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 227 selfloop transitions, 266 changer transitions 56/590 dead transitions. [2022-07-19 21:40:37,351 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 590 transitions, 4581 flow [2022-07-19 21:40:37,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-19 21:40:37,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-07-19 21:40:37,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 4757 transitions. [2022-07-19 21:40:37,359 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6357925688318632 [2022-07-19 21:40:37,360 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 4757 transitions. [2022-07-19 21:40:37,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 4757 transitions. [2022-07-19 21:40:37,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:37,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 4757 transitions. [2022-07-19 21:40:37,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 54.67816091954023) internal successors, (4757), 87 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:37,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 86.0) internal successors, (7568), 88 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:37,393 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 86.0) internal successors, (7568), 88 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:37,394 INFO L186 Difference]: Start difference. First operand has 168 places, 202 transitions, 991 flow. Second operand 87 states and 4757 transitions. [2022-07-19 21:40:37,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 590 transitions, 4581 flow [2022-07-19 21:40:37,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 590 transitions, 4047 flow, removed 248 selfloop flow, removed 16 redundant places. [2022-07-19 21:40:37,438 INFO L242 Difference]: Finished difference. Result has 269 places, 428 transitions, 3374 flow [2022-07-19 21:40:37,439 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=3374, PETRI_PLACES=269, PETRI_TRANSITIONS=428} [2022-07-19 21:40:37,441 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 193 predicate places. [2022-07-19 21:40:37,441 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 428 transitions, 3374 flow [2022-07-19 21:40:37,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:37,442 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:37,442 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:37,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 21:40:37,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:37,648 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:40:37,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:37,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1618685851, now seen corresponding path program 3 times [2022-07-19 21:40:37,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:37,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481964049] [2022-07-19 21:40:37,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:37,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:37,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:37,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:37,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:37,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481964049] [2022-07-19 21:40:37,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481964049] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:37,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390031628] [2022-07-19 21:40:37,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:40:37,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:37,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:37,871 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) [2022-07-19 21:40:37,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:40:37,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 21:40:37,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:40:37,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:40:37,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:38,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:40:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:38,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390031628] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:40:38,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:40:38,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-19 21:40:38,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507632939] [2022-07-19 21:40:38,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:40:38,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 21:40:38,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:38,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 21:40:38,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 21:40:38,639 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-19 21:40:38,640 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 428 transitions, 3374 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:38,640 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:38,641 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-19 21:40:38,641 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:42,029 INFO L129 PetriNetUnfolder]: 490/1647 cut-off events. [2022-07-19 21:40:42,029 INFO L130 PetriNetUnfolder]: For 15362/15362 co-relation queries the response was YES. [2022-07-19 21:40:42,041 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7785 conditions, 1647 events. 490/1647 cut-off events. For 15362/15362 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12348 event pairs, 16 based on Foata normal form. 2/1646 useless extension candidates. Maximal degree in co-relation 7714. Up to 315 conditions per place. [2022-07-19 21:40:42,052 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 190 selfloop transitions, 394 changer transitions 32/657 dead transitions. [2022-07-19 21:40:42,053 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 657 transitions, 7175 flow [2022-07-19 21:40:42,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-19 21:40:42,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-07-19 21:40:42,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 4564 transitions. [2022-07-19 21:40:42,064 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6393947884561502 [2022-07-19 21:40:42,065 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 4564 transitions. [2022-07-19 21:40:42,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 4564 transitions. [2022-07-19 21:40:42,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:42,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 4564 transitions. [2022-07-19 21:40:42,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 54.98795180722892) internal successors, (4564), 83 states have internal predecessors, (4564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:42,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 86.0) internal successors, (7224), 84 states have internal predecessors, (7224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:42,086 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 86.0) internal successors, (7224), 84 states have internal predecessors, (7224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:42,086 INFO L186 Difference]: Start difference. First operand has 269 places, 428 transitions, 3374 flow. Second operand 83 states and 4564 transitions. [2022-07-19 21:40:42,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 657 transitions, 7175 flow [2022-07-19 21:40:42,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 657 transitions, 6691 flow, removed 242 selfloop flow, removed 12 redundant places. [2022-07-19 21:40:42,199 INFO L242 Difference]: Finished difference. Result has 338 places, 522 transitions, 4999 flow [2022-07-19 21:40:42,200 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=3216, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=301, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=4999, PETRI_PLACES=338, PETRI_TRANSITIONS=522} [2022-07-19 21:40:42,201 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 262 predicate places. [2022-07-19 21:40:42,201 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 522 transitions, 4999 flow [2022-07-19 21:40:42,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:42,202 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:42,202 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:42,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 21:40:42,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:42,403 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:40:42,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:42,403 INFO L85 PathProgramCache]: Analyzing trace with hash -2101775999, now seen corresponding path program 4 times [2022-07-19 21:40:42,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:42,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840499478] [2022-07-19 21:40:42,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:42,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:42,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:42,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:42,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840499478] [2022-07-19 21:40:42,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840499478] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:42,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487059419] [2022-07-19 21:40:42,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:40:42,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:42,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:42,588 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) [2022-07-19 21:40:42,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:40:42,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:40:42,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:40:42,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:40:42,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:42,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:42,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:40:43,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:43,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487059419] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:40:43,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:40:43,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-19 21:40:43,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596486683] [2022-07-19 21:40:43,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:40:43,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 21:40:43,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:43,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 21:40:43,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 21:40:43,361 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-19 21:40:43,362 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 522 transitions, 4999 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:43,363 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:43,363 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-19 21:40:43,363 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:46,715 INFO L129 PetriNetUnfolder]: 650/2189 cut-off events. [2022-07-19 21:40:46,716 INFO L130 PetriNetUnfolder]: For 24593/24593 co-relation queries the response was YES. [2022-07-19 21:40:46,726 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11480 conditions, 2189 events. 650/2189 cut-off events. For 24593/24593 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17713 event pairs, 22 based on Foata normal form. 3/2189 useless extension candidates. Maximal degree in co-relation 11404. Up to 427 conditions per place. [2022-07-19 21:40:46,739 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 299 selfloop transitions, 484 changer transitions 24/848 dead transitions. [2022-07-19 21:40:46,739 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 848 transitions, 10549 flow [2022-07-19 21:40:46,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-19 21:40:46,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-07-19 21:40:46,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 4335 transitions. [2022-07-19 21:40:46,747 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6462432915921288 [2022-07-19 21:40:46,747 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 4335 transitions. [2022-07-19 21:40:46,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 4335 transitions. [2022-07-19 21:40:46,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:46,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 4335 transitions. [2022-07-19 21:40:46,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 55.57692307692308) internal successors, (4335), 78 states have internal predecessors, (4335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:46,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 86.0) internal successors, (6794), 79 states have internal predecessors, (6794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:46,767 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 86.0) internal successors, (6794), 79 states have internal predecessors, (6794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:46,768 INFO L186 Difference]: Start difference. First operand has 338 places, 522 transitions, 4999 flow. Second operand 78 states and 4335 transitions. [2022-07-19 21:40:46,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 848 transitions, 10549 flow [2022-07-19 21:40:46,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 848 transitions, 9655 flow, removed 201 selfloop flow, removed 40 redundant places. [2022-07-19 21:40:46,905 INFO L242 Difference]: Finished difference. Result has 391 places, 664 transitions, 7404 flow [2022-07-19 21:40:46,905 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=4448, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=7404, PETRI_PLACES=391, PETRI_TRANSITIONS=664} [2022-07-19 21:40:46,906 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 315 predicate places. [2022-07-19 21:40:46,906 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 664 transitions, 7404 flow [2022-07-19 21:40:46,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:46,907 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:46,907 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:46,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-19 21:40:47,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:47,124 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:40:47,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:47,124 INFO L85 PathProgramCache]: Analyzing trace with hash 512513747, now seen corresponding path program 5 times [2022-07-19 21:40:47,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:47,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850435106] [2022-07-19 21:40:47,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:47,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:47,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:47,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850435106] [2022-07-19 21:40:47,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850435106] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:47,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169698799] [2022-07-19 21:40:47,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:40:47,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:47,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:47,312 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) [2022-07-19 21:40:47,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:40:47,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:40:47,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:40:47,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:40:47,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:47,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:40:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:48,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169698799] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:40:48,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:40:48,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-19 21:40:48,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363039549] [2022-07-19 21:40:48,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:40:48,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 21:40:48,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:48,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 21:40:48,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 21:40:48,148 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-19 21:40:48,150 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 664 transitions, 7404 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:48,150 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:48,150 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-19 21:40:48,150 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:51,733 INFO L129 PetriNetUnfolder]: 665/2221 cut-off events. [2022-07-19 21:40:51,734 INFO L130 PetriNetUnfolder]: For 37552/37552 co-relation queries the response was YES. [2022-07-19 21:40:51,788 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13155 conditions, 2221 events. 665/2221 cut-off events. For 37552/37552 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17983 event pairs, 28 based on Foata normal form. 5/2222 useless extension candidates. Maximal degree in co-relation 13060. Up to 425 conditions per place. [2022-07-19 21:40:51,803 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 249 selfloop transitions, 523 changer transitions 35/848 dead transitions. [2022-07-19 21:40:51,803 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 848 transitions, 11873 flow [2022-07-19 21:40:51,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-07-19 21:40:51,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2022-07-19 21:40:51,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 5073 transitions. [2022-07-19 21:40:51,816 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6411779575328614 [2022-07-19 21:40:51,816 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 5073 transitions. [2022-07-19 21:40:51,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 5073 transitions. [2022-07-19 21:40:51,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:51,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 5073 transitions. [2022-07-19 21:40:51,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 55.141304347826086) internal successors, (5073), 92 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:51,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 86.0) internal successors, (7998), 93 states have internal predecessors, (7998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:51,840 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 86.0) internal successors, (7998), 93 states have internal predecessors, (7998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:51,841 INFO L186 Difference]: Start difference. First operand has 391 places, 664 transitions, 7404 flow. Second operand 92 states and 5073 transitions. [2022-07-19 21:40:51,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 848 transitions, 11873 flow [2022-07-19 21:40:52,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 848 transitions, 11067 flow, removed 283 selfloop flow, removed 32 redundant places. [2022-07-19 21:40:52,037 INFO L242 Difference]: Finished difference. Result has 461 places, 689 transitions, 8557 flow [2022-07-19 21:40:52,038 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=6847, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=495, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=8557, PETRI_PLACES=461, PETRI_TRANSITIONS=689} [2022-07-19 21:40:52,038 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 385 predicate places. [2022-07-19 21:40:52,039 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 689 transitions, 8557 flow [2022-07-19 21:40:52,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:52,039 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:52,039 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:52,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 21:40:52,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:52,255 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:40:52,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:52,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1925482755, now seen corresponding path program 6 times [2022-07-19 21:40:52,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:52,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305244013] [2022-07-19 21:40:52,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:52,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:52,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:52,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:52,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305244013] [2022-07-19 21:40:52,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305244013] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:52,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693188312] [2022-07-19 21:40:52,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:40:52,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:52,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:52,468 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) [2022-07-19 21:40:52,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:40:52,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-19 21:40:52,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:40:52,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-19 21:40:52,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:53,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:53,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:40:53,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:53,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693188312] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:40:53,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:40:53,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 38 [2022-07-19 21:40:53,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484389415] [2022-07-19 21:40:53,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:40:53,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-19 21:40:53,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:53,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-19 21:40:53,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1212, Unknown=0, NotChecked=0, Total=1406 [2022-07-19 21:40:53,754 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-19 21:40:53,755 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 689 transitions, 8557 flow. Second operand has 38 states, 38 states have (on average 52.78947368421053) internal successors, (2006), 38 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:53,755 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:53,755 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-19 21:40:53,756 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:56,552 INFO L129 PetriNetUnfolder]: 887/2912 cut-off events. [2022-07-19 21:40:56,552 INFO L130 PetriNetUnfolder]: For 49528/49528 co-relation queries the response was YES. [2022-07-19 21:40:56,573 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18206 conditions, 2912 events. 887/2912 cut-off events. For 49528/49528 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 25336 event pairs, 33 based on Foata normal form. 2/2905 useless extension candidates. Maximal degree in co-relation 18100. Up to 777 conditions per place. [2022-07-19 21:40:56,594 INFO L132 encePairwiseOnDemand]: 66/86 looper letters, 296 selfloop transitions, 714 changer transitions 36/1087 dead transitions. [2022-07-19 21:40:56,594 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 1087 transitions, 16485 flow [2022-07-19 21:40:56,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-19 21:40:56,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-07-19 21:40:56,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3501 transitions. [2022-07-19 21:40:56,598 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6360828488372093 [2022-07-19 21:40:56,598 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3501 transitions. [2022-07-19 21:40:56,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3501 transitions. [2022-07-19 21:40:56,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:56,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3501 transitions. [2022-07-19 21:40:56,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 54.703125) internal successors, (3501), 64 states have internal predecessors, (3501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:56,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:56,610 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:56,610 INFO L186 Difference]: Start difference. First operand has 461 places, 689 transitions, 8557 flow. Second operand 64 states and 3501 transitions. [2022-07-19 21:40:56,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 1087 transitions, 16485 flow [2022-07-19 21:40:56,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 1087 transitions, 15330 flow, removed 147 selfloop flow, removed 66 redundant places. [2022-07-19 21:40:56,980 INFO L242 Difference]: Finished difference. Result has 468 places, 971 transitions, 14134 flow [2022-07-19 21:40:56,981 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=7795, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=459, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=14134, PETRI_PLACES=468, PETRI_TRANSITIONS=971} [2022-07-19 21:40:56,982 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 392 predicate places. [2022-07-19 21:40:56,982 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 971 transitions, 14134 flow [2022-07-19 21:40:56,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.78947368421053) internal successors, (2006), 38 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:56,982 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:56,982 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:56,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-19 21:40:57,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:57,183 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:40:57,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:57,184 INFO L85 PathProgramCache]: Analyzing trace with hash -384124897, now seen corresponding path program 7 times [2022-07-19 21:40:57,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:57,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029375770] [2022-07-19 21:40:57,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:57,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:57,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:57,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:57,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029375770] [2022-07-19 21:40:57,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029375770] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:57,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116907333] [2022-07-19 21:40:57,384 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 21:40:57,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:57,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:57,386 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) [2022-07-19 21:40:57,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:40:57,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:57,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:40:57,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:57,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:40:58,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:58,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116907333] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:40:58,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:40:58,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-19 21:40:58,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122721957] [2022-07-19 21:40:58,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:40:58,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 21:40:58,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:58,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 21:40:58,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 21:40:58,085 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-19 21:40:58,086 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 971 transitions, 14134 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:58,086 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:58,087 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-19 21:40:58,087 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:01,249 INFO L129 PetriNetUnfolder]: 947/3122 cut-off events. [2022-07-19 21:41:01,249 INFO L130 PetriNetUnfolder]: For 58740/58740 co-relation queries the response was YES. [2022-07-19 21:41:01,279 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21444 conditions, 3122 events. 947/3122 cut-off events. For 58740/58740 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 27451 event pairs, 58 based on Foata normal form. 2/3118 useless extension candidates. Maximal degree in co-relation 21327. Up to 950 conditions per place. [2022-07-19 21:41:01,301 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 330 selfloop transitions, 852 changer transitions 12/1235 dead transitions. [2022-07-19 21:41:01,301 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 1235 transitions, 21050 flow [2022-07-19 21:41:01,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-19 21:41:01,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-07-19 21:41:01,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3758 transitions. [2022-07-19 21:41:01,313 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6426128590971272 [2022-07-19 21:41:01,313 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3758 transitions. [2022-07-19 21:41:01,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3758 transitions. [2022-07-19 21:41:01,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:01,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3758 transitions. [2022-07-19 21:41:01,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 55.26470588235294) internal successors, (3758), 68 states have internal predecessors, (3758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:01,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 86.0) internal successors, (5934), 69 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:01,332 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 86.0) internal successors, (5934), 69 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:01,332 INFO L186 Difference]: Start difference. First operand has 468 places, 971 transitions, 14134 flow. Second operand 68 states and 3758 transitions. [2022-07-19 21:41:01,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 1235 transitions, 21050 flow [2022-07-19 21:41:01,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 1235 transitions, 20056 flow, removed 335 selfloop flow, removed 27 redundant places. [2022-07-19 21:41:01,817 INFO L242 Difference]: Finished difference. Result has 521 places, 1131 transitions, 19020 flow [2022-07-19 21:41:01,818 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=13421, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=971, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=698, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=19020, PETRI_PLACES=521, PETRI_TRANSITIONS=1131} [2022-07-19 21:41:01,819 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 445 predicate places. [2022-07-19 21:41:01,819 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 1131 transitions, 19020 flow [2022-07-19 21:41:01,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:01,820 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:01,820 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:01,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 21:41:02,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:02,024 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:41:02,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:02,024 INFO L85 PathProgramCache]: Analyzing trace with hash 191624049, now seen corresponding path program 8 times [2022-07-19 21:41:02,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:02,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379208574] [2022-07-19 21:41:02,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:02,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:02,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:02,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:02,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:02,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379208574] [2022-07-19 21:41:02,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379208574] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:02,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717690098] [2022-07-19 21:41:02,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:41:02,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:02,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:02,263 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) [2022-07-19 21:41:02,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 21:41:02,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:41:02,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:41:02,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:41:02,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:02,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:03,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717690098] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:03,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:03,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-19 21:41:03,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046480453] [2022-07-19 21:41:03,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:03,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 21:41:03,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:03,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 21:41:03,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 21:41:03,005 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-19 21:41:03,007 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 1131 transitions, 19020 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:03,007 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:03,007 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-19 21:41:03,007 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:05,902 INFO L129 PetriNetUnfolder]: 947/3111 cut-off events. [2022-07-19 21:41:05,902 INFO L130 PetriNetUnfolder]: For 71630/71630 co-relation queries the response was YES. [2022-07-19 21:41:05,931 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22562 conditions, 3111 events. 947/3111 cut-off events. For 71630/71630 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 27379 event pairs, 69 based on Foata normal form. 2/3107 useless extension candidates. Maximal degree in co-relation 22442. Up to 905 conditions per place. [2022-07-19 21:41:05,956 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 391 selfloop transitions, 776 changer transitions 14/1222 dead transitions. [2022-07-19 21:41:05,957 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 1222 transitions, 22967 flow [2022-07-19 21:41:05,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-19 21:41:05,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-07-19 21:41:05,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3416 transitions. [2022-07-19 21:41:05,961 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6406601650412603 [2022-07-19 21:41:05,962 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3416 transitions. [2022-07-19 21:41:05,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3416 transitions. [2022-07-19 21:41:05,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:05,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3416 transitions. [2022-07-19 21:41:05,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 55.096774193548384) internal successors, (3416), 62 states have internal predecessors, (3416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:05,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 86.0) internal successors, (5418), 63 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:05,975 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 86.0) internal successors, (5418), 63 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:05,975 INFO L186 Difference]: Start difference. First operand has 521 places, 1131 transitions, 19020 flow. Second operand 62 states and 3416 transitions. [2022-07-19 21:41:05,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 1222 transitions, 22967 flow [2022-07-19 21:41:06,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 1222 transitions, 21899 flow, removed 243 selfloop flow, removed 36 redundant places. [2022-07-19 21:41:06,553 INFO L242 Difference]: Finished difference. Result has 550 places, 1141 transitions, 19828 flow [2022-07-19 21:41:06,555 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=18007, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=764, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=19828, PETRI_PLACES=550, PETRI_TRANSITIONS=1141} [2022-07-19 21:41:06,555 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 474 predicate places. [2022-07-19 21:41:06,555 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 1141 transitions, 19828 flow [2022-07-19 21:41:06,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:06,556 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:06,556 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:06,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-19 21:41:06,759 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,SelfDestructingSolverStorable10 [2022-07-19 21:41:06,760 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:41:06,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:06,760 INFO L85 PathProgramCache]: Analyzing trace with hash 866299875, now seen corresponding path program 9 times [2022-07-19 21:41:06,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:06,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313357399] [2022-07-19 21:41:06,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:06,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:06,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:06,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313357399] [2022-07-19 21:41:06,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313357399] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:06,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151387437] [2022-07-19 21:41:06,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:41:06,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:06,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:06,980 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) [2022-07-19 21:41:07,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 21:41:07,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 21:41:07,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:41:07,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:41:07,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:07,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:07,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:07,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151387437] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:07,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:07,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-19 21:41:07,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491394275] [2022-07-19 21:41:07,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:07,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 21:41:07,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:07,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 21:41:07,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 21:41:07,779 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-19 21:41:07,780 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 1141 transitions, 19828 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:07,780 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:07,781 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-19 21:41:07,781 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:09,987 INFO L129 PetriNetUnfolder]: 1014/3285 cut-off events. [2022-07-19 21:41:09,987 INFO L130 PetriNetUnfolder]: For 75708/75708 co-relation queries the response was YES. [2022-07-19 21:41:10,106 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24752 conditions, 3285 events. 1014/3285 cut-off events. For 75708/75708 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 29142 event pairs, 71 based on Foata normal form. 1/3277 useless extension candidates. Maximal degree in co-relation 24629. Up to 1420 conditions per place. [2022-07-19 21:41:10,129 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 534 selfloop transitions, 731 changer transitions 6/1312 dead transitions. [2022-07-19 21:41:10,129 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 1312 transitions, 25324 flow [2022-07-19 21:41:10,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-19 21:41:10,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-07-19 21:41:10,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2311 transitions. [2022-07-19 21:41:10,132 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6398117386489479 [2022-07-19 21:41:10,132 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2311 transitions. [2022-07-19 21:41:10,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2311 transitions. [2022-07-19 21:41:10,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:10,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2311 transitions. [2022-07-19 21:41:10,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 55.023809523809526) internal successors, (2311), 42 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:10,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 86.0) internal successors, (3698), 43 states have internal predecessors, (3698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:10,141 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 86.0) internal successors, (3698), 43 states have internal predecessors, (3698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:10,141 INFO L186 Difference]: Start difference. First operand has 550 places, 1141 transitions, 19828 flow. Second operand 42 states and 2311 transitions. [2022-07-19 21:41:10,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 1312 transitions, 25324 flow [2022-07-19 21:41:10,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 1312 transitions, 24867 flow, removed 45 selfloop flow, removed 33 redundant places. [2022-07-19 21:41:10,728 INFO L242 Difference]: Finished difference. Result has 567 places, 1256 transitions, 24144 flow [2022-07-19 21:41:10,729 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=19445, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=633, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=24144, PETRI_PLACES=567, PETRI_TRANSITIONS=1256} [2022-07-19 21:41:10,730 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 491 predicate places. [2022-07-19 21:41:10,730 INFO L495 AbstractCegarLoop]: Abstraction has has 567 places, 1256 transitions, 24144 flow [2022-07-19 21:41:10,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:10,731 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:10,731 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:10,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 21:41:10,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:10,947 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:41:10,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:10,948 INFO L85 PathProgramCache]: Analyzing trace with hash -702432183, now seen corresponding path program 10 times [2022-07-19 21:41:10,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:10,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013562332] [2022-07-19 21:41:10,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:10,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:10,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:11,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:11,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013562332] [2022-07-19 21:41:11,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013562332] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:11,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509168353] [2022-07-19 21:41:11,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:41:11,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:11,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:11,164 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) [2022-07-19 21:41:11,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 21:41:11,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:41:11,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:41:11,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:41:11,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:11,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:11,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509168353] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:11,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:11,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-19 21:41:11,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033758767] [2022-07-19 21:41:11,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:11,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 21:41:11,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:11,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 21:41:11,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 21:41:11,992 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-19 21:41:11,993 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 1256 transitions, 24144 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:11,993 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:11,993 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-19 21:41:11,993 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:15,064 INFO L129 PetriNetUnfolder]: 1050/3409 cut-off events. [2022-07-19 21:41:15,064 INFO L130 PetriNetUnfolder]: For 84144/84144 co-relation queries the response was YES. [2022-07-19 21:41:15,093 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27520 conditions, 3409 events. 1050/3409 cut-off events. For 84144/84144 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 30540 event pairs, 65 based on Foata normal form. 1/3403 useless extension candidates. Maximal degree in co-relation 27390. Up to 1333 conditions per place. [2022-07-19 21:41:15,110 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 469 selfloop transitions, 870 changer transitions 6/1386 dead transitions. [2022-07-19 21:41:15,110 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 1386 transitions, 29401 flow [2022-07-19 21:41:15,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-19 21:41:15,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-07-19 21:41:15,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2809 transitions. [2022-07-19 21:41:15,113 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6404468764249887 [2022-07-19 21:41:15,114 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2809 transitions. [2022-07-19 21:41:15,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2809 transitions. [2022-07-19 21:41:15,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:15,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2809 transitions. [2022-07-19 21:41:15,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 55.07843137254902) internal successors, (2809), 51 states have internal predecessors, (2809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:15,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 86.0) internal successors, (4472), 52 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:15,122 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 86.0) internal successors, (4472), 52 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:15,122 INFO L186 Difference]: Start difference. First operand has 567 places, 1256 transitions, 24144 flow. Second operand 51 states and 2809 transitions. [2022-07-19 21:41:15,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 1386 transitions, 29401 flow [2022-07-19 21:41:15,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 1386 transitions, 29251 flow, removed 56 selfloop flow, removed 9 redundant places. [2022-07-19 21:41:15,763 INFO L242 Difference]: Finished difference. Result has 617 places, 1314 transitions, 27516 flow [2022-07-19 21:41:15,764 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=24014, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=814, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=27516, PETRI_PLACES=617, PETRI_TRANSITIONS=1314} [2022-07-19 21:41:15,764 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 541 predicate places. [2022-07-19 21:41:15,764 INFO L495 AbstractCegarLoop]: Abstraction has has 617 places, 1314 transitions, 27516 flow [2022-07-19 21:41:15,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:15,765 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:15,765 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:15,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 21:41:15,965 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,SelfDestructingSolverStorable12 [2022-07-19 21:41:15,966 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:41:15,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:15,966 INFO L85 PathProgramCache]: Analyzing trace with hash -499373303, now seen corresponding path program 11 times [2022-07-19 21:41:15,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:15,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007093979] [2022-07-19 21:41:15,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:15,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:16,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:16,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007093979] [2022-07-19 21:41:16,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007093979] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:16,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334922642] [2022-07-19 21:41:16,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:41:16,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:16,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:16,162 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) [2022-07-19 21:41:16,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 21:41:16,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-19 21:41:16,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:41:16,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:41:16,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:16,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:16,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:16,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334922642] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:16,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:16,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-19 21:41:16,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453413842] [2022-07-19 21:41:16,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:16,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 21:41:16,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:16,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 21:41:16,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 21:41:16,812 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-19 21:41:16,814 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 1314 transitions, 27516 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:16,814 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:16,814 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-19 21:41:16,814 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:19,799 INFO L129 PetriNetUnfolder]: 1090/3540 cut-off events. [2022-07-19 21:41:19,799 INFO L130 PetriNetUnfolder]: For 100524/100524 co-relation queries the response was YES. [2022-07-19 21:41:19,845 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30602 conditions, 3540 events. 1090/3540 cut-off events. For 100524/100524 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 32151 event pairs, 71 based on Foata normal form. 2/3532 useless extension candidates. Maximal degree in co-relation 30462. Up to 1496 conditions per place. [2022-07-19 21:41:19,864 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 591 selfloop transitions, 849 changer transitions 12/1493 dead transitions. [2022-07-19 21:41:19,864 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 1493 transitions, 33976 flow [2022-07-19 21:41:19,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-19 21:41:19,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-19 21:41:19,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2845 transitions. [2022-07-19 21:41:19,866 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.636180679785331 [2022-07-19 21:41:19,867 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2845 transitions. [2022-07-19 21:41:19,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2845 transitions. [2022-07-19 21:41:19,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:19,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2845 transitions. [2022-07-19 21:41:19,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 54.71153846153846) internal successors, (2845), 52 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:19,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 86.0) internal successors, (4558), 53 states have internal predecessors, (4558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:19,875 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 86.0) internal successors, (4558), 53 states have internal predecessors, (4558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:19,875 INFO L186 Difference]: Start difference. First operand has 617 places, 1314 transitions, 27516 flow. Second operand 52 states and 2845 transitions. [2022-07-19 21:41:19,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 1493 transitions, 33976 flow [2022-07-19 21:41:20,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 635 places, 1493 transitions, 33404 flow, removed 120 selfloop flow, removed 30 redundant places. [2022-07-19 21:41:20,908 INFO L242 Difference]: Finished difference. Result has 653 places, 1414 transitions, 32136 flow [2022-07-19 21:41:20,909 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=26987, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=755, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=32136, PETRI_PLACES=653, PETRI_TRANSITIONS=1414} [2022-07-19 21:41:20,910 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 577 predicate places. [2022-07-19 21:41:20,910 INFO L495 AbstractCegarLoop]: Abstraction has has 653 places, 1414 transitions, 32136 flow [2022-07-19 21:41:20,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:20,911 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:20,911 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:20,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-19 21:41:21,134 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,SelfDestructingSolverStorable13 [2022-07-19 21:41:21,134 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:41:21,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:21,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1679895921, now seen corresponding path program 12 times [2022-07-19 21:41:21,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:21,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144052480] [2022-07-19 21:41:21,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:21,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:21,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:21,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:21,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:21,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144052480] [2022-07-19 21:41:21,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144052480] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:21,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338849271] [2022-07-19 21:41:21,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:41:21,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:21,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:21,360 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) [2022-07-19 21:41:21,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 21:41:21,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-19 21:41:21,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:41:21,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:41:21,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:21,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:21,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:22,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:22,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338849271] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:22,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:22,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-19 21:41:22,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855339334] [2022-07-19 21:41:22,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:22,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 21:41:22,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:22,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 21:41:22,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 21:41:22,111 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-19 21:41:22,112 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 653 places, 1414 transitions, 32136 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:22,112 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:22,112 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-19 21:41:22,112 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:25,275 INFO L129 PetriNetUnfolder]: 1090/3513 cut-off events. [2022-07-19 21:41:25,276 INFO L130 PetriNetUnfolder]: For 112870/112870 co-relation queries the response was YES. [2022-07-19 21:41:25,318 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32702 conditions, 3513 events. 1090/3513 cut-off events. For 112870/112870 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 31753 event pairs, 77 based on Foata normal form. 1/3508 useless extension candidates. Maximal degree in co-relation 32547. Up to 1290 conditions per place. [2022-07-19 21:41:25,343 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 619 selfloop transitions, 818 changer transitions 8/1486 dead transitions. [2022-07-19 21:41:25,343 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 695 places, 1486 transitions, 36282 flow [2022-07-19 21:41:25,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-19 21:41:25,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-07-19 21:41:25,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2688 transitions. [2022-07-19 21:41:25,347 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6378737541528239 [2022-07-19 21:41:25,347 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2688 transitions. [2022-07-19 21:41:25,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2688 transitions. [2022-07-19 21:41:25,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:25,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2688 transitions. [2022-07-19 21:41:25,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 54.857142857142854) internal successors, (2688), 49 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:25,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:25,355 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:25,356 INFO L186 Difference]: Start difference. First operand has 653 places, 1414 transitions, 32136 flow. Second operand 49 states and 2688 transitions. [2022-07-19 21:41:25,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 695 places, 1486 transitions, 36282 flow [2022-07-19 21:41:26,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 1486 transitions, 35686 flow, removed 121 selfloop flow, removed 26 redundant places. [2022-07-19 21:41:26,668 INFO L242 Difference]: Finished difference. Result has 675 places, 1420 transitions, 33451 flow [2022-07-19 21:41:26,670 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=31572, PETRI_DIFFERENCE_MINUEND_PLACES=621, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=811, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=33451, PETRI_PLACES=675, PETRI_TRANSITIONS=1420} [2022-07-19 21:41:26,671 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 599 predicate places. [2022-07-19 21:41:26,671 INFO L495 AbstractCegarLoop]: Abstraction has has 675 places, 1420 transitions, 33451 flow [2022-07-19 21:41:26,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:26,672 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:26,672 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:26,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 21:41:26,887 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,SelfDestructingSolverStorable14 [2022-07-19 21:41:26,887 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:41:26,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:26,888 INFO L85 PathProgramCache]: Analyzing trace with hash 927311605, now seen corresponding path program 13 times [2022-07-19 21:41:26,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:26,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107938688] [2022-07-19 21:41:26,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:26,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:26,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:27,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:27,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:27,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107938688] [2022-07-19 21:41:27,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107938688] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:27,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958714308] [2022-07-19 21:41:27,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 21:41:27,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:27,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:27,079 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:41:27,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 21:41:27,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:27,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:41:27,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:27,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:27,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:27,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958714308] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:27,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:27,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-19 21:41:27,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501265487] [2022-07-19 21:41:27,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:27,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 21:41:27,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:27,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 21:41:27,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 21:41:27,783 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-19 21:41:27,784 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 675 places, 1420 transitions, 33451 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:27,784 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:27,784 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-19 21:41:27,785 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:31,752 INFO L129 PetriNetUnfolder]: 1124/3638 cut-off events. [2022-07-19 21:41:31,752 INFO L130 PetriNetUnfolder]: For 121515/121515 co-relation queries the response was YES. [2022-07-19 21:41:31,791 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34747 conditions, 3638 events. 1124/3638 cut-off events. For 121515/121515 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 33167 event pairs, 67 based on Foata normal form. 1/3633 useless extension candidates. Maximal degree in co-relation 34594. Up to 1403 conditions per place. [2022-07-19 21:41:31,813 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 521 selfloop transitions, 1006 changer transitions 6/1574 dead transitions. [2022-07-19 21:41:31,813 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 727 places, 1574 transitions, 39871 flow [2022-07-19 21:41:31,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-19 21:41:31,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-07-19 21:41:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3189 transitions. [2022-07-19 21:41:31,816 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6393344025661588 [2022-07-19 21:41:31,816 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3189 transitions. [2022-07-19 21:41:31,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3189 transitions. [2022-07-19 21:41:31,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:31,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3189 transitions. [2022-07-19 21:41:31,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 54.98275862068966) internal successors, (3189), 58 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:31,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:31,823 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:31,823 INFO L186 Difference]: Start difference. First operand has 675 places, 1420 transitions, 33451 flow. Second operand 58 states and 3189 transitions. [2022-07-19 21:41:31,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 727 places, 1574 transitions, 39871 flow [2022-07-19 21:41:32,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 692 places, 1574 transitions, 39285 flow, removed 47 selfloop flow, removed 35 redundant places. [2022-07-19 21:41:33,007 INFO L242 Difference]: Finished difference. Result has 708 places, 1488 transitions, 37088 flow [2022-07-19 21:41:33,009 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=32947, PETRI_DIFFERENCE_MINUEND_PLACES=635, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=939, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=37088, PETRI_PLACES=708, PETRI_TRANSITIONS=1488} [2022-07-19 21:41:33,009 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 632 predicate places. [2022-07-19 21:41:33,009 INFO L495 AbstractCegarLoop]: Abstraction has has 708 places, 1488 transitions, 37088 flow [2022-07-19 21:41:33,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:33,010 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:33,010 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:33,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 21:41:33,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-19 21:41:33,216 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:41:33,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:33,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1524161261, now seen corresponding path program 14 times [2022-07-19 21:41:33,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:33,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548444531] [2022-07-19 21:41:33,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:33,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:33,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:33,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:33,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:33,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548444531] [2022-07-19 21:41:33,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548444531] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:33,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185019050] [2022-07-19 21:41:33,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:41:33,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:33,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:33,441 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:41:33,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 21:41:33,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:41:33,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:41:33,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:41:33,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:33,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:34,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:34,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185019050] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:34,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:34,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-19 21:41:34,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561491435] [2022-07-19 21:41:34,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:34,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 21:41:34,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:34,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 21:41:34,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 21:41:34,155 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-19 21:41:34,156 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 708 places, 1488 transitions, 37088 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:34,156 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:34,156 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-19 21:41:34,157 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:37,193 INFO L129 PetriNetUnfolder]: 1151/3716 cut-off events. [2022-07-19 21:41:37,193 INFO L130 PetriNetUnfolder]: For 138497/138497 co-relation queries the response was YES. [2022-07-19 21:41:37,235 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37388 conditions, 3716 events. 1151/3716 cut-off events. For 138497/138497 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 34126 event pairs, 76 based on Foata normal form. 1/3708 useless extension candidates. Maximal degree in co-relation 37226. Up to 1366 conditions per place. [2022-07-19 21:41:37,259 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 700 selfloop transitions, 872 changer transitions 8/1621 dead transitions. [2022-07-19 21:41:37,260 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 744 places, 1621 transitions, 43426 flow [2022-07-19 21:41:37,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-19 21:41:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-07-19 21:41:37,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2212 transitions. [2022-07-19 21:41:37,261 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6430232558139535 [2022-07-19 21:41:37,262 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2212 transitions. [2022-07-19 21:41:37,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2212 transitions. [2022-07-19 21:41:37,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:37,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2212 transitions. [2022-07-19 21:41:37,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.3) internal successors, (2212), 40 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:37,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 86.0) internal successors, (3526), 41 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:37,266 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 86.0) internal successors, (3526), 41 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:37,266 INFO L186 Difference]: Start difference. First operand has 708 places, 1488 transitions, 37088 flow. Second operand 40 states and 2212 transitions. [2022-07-19 21:41:37,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 744 places, 1621 transitions, 43426 flow [2022-07-19 21:41:38,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 718 places, 1621 transitions, 41918 flow, removed 297 selfloop flow, removed 26 redundant places. [2022-07-19 21:41:38,549 INFO L242 Difference]: Finished difference. Result has 728 places, 1534 transitions, 40174 flow [2022-07-19 21:41:38,550 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=35831, PETRI_DIFFERENCE_MINUEND_PLACES=679, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=827, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=40174, PETRI_PLACES=728, PETRI_TRANSITIONS=1534} [2022-07-19 21:41:38,550 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 652 predicate places. [2022-07-19 21:41:38,551 INFO L495 AbstractCegarLoop]: Abstraction has has 728 places, 1534 transitions, 40174 flow [2022-07-19 21:41:38,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:38,551 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:38,551 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:38,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 21:41:38,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:38,752 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:41:38,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:38,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1446911885, now seen corresponding path program 15 times [2022-07-19 21:41:38,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:38,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188468032] [2022-07-19 21:41:38,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:38,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:38,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:38,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:38,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188468032] [2022-07-19 21:41:38,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188468032] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:38,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871308927] [2022-07-19 21:41:38,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:41:38,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:38,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:38,960 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:41:38,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 21:41:39,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 21:41:39,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:41:39,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:41:39,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:39,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:39,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:39,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871308927] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:39,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:39,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-19 21:41:39,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681033492] [2022-07-19 21:41:39,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:39,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 21:41:39,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:39,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 21:41:39,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 21:41:39,632 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-19 21:41:39,633 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 728 places, 1534 transitions, 40174 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:39,633 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:39,633 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-19 21:41:39,633 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:42,946 INFO L129 PetriNetUnfolder]: 1150/3701 cut-off events. [2022-07-19 21:41:42,946 INFO L130 PetriNetUnfolder]: For 144718/144728 co-relation queries the response was YES. [2022-07-19 21:41:42,986 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38568 conditions, 3701 events. 1150/3701 cut-off events. For 144718/144728 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 33898 event pairs, 84 based on Foata normal form. 3/3696 useless extension candidates. Maximal degree in co-relation 38399. Up to 1325 conditions per place. [2022-07-19 21:41:43,009 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 668 selfloop transitions, 887 changer transitions 8/1604 dead transitions. [2022-07-19 21:41:43,010 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 767 places, 1604 transitions, 44622 flow [2022-07-19 21:41:43,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-19 21:41:43,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-07-19 21:41:43,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2370 transitions. [2022-07-19 21:41:43,012 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6408869659275284 [2022-07-19 21:41:43,012 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2370 transitions. [2022-07-19 21:41:43,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2370 transitions. [2022-07-19 21:41:43,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:43,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2370 transitions. [2022-07-19 21:41:43,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 55.116279069767444) internal successors, (2370), 43 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:43,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 86.0) internal successors, (3784), 44 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:43,016 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 86.0) internal successors, (3784), 44 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:43,016 INFO L186 Difference]: Start difference. First operand has 728 places, 1534 transitions, 40174 flow. Second operand 43 states and 2370 transitions. [2022-07-19 21:41:43,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 767 places, 1604 transitions, 44622 flow [2022-07-19 21:41:44,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 743 places, 1604 transitions, 44074 flow, removed 39 selfloop flow, removed 24 redundant places. [2022-07-19 21:41:44,271 INFO L242 Difference]: Finished difference. Result has 747 places, 1536 transitions, 41560 flow [2022-07-19 21:41:44,273 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=39650, PETRI_DIFFERENCE_MINUEND_PLACES=701, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=883, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=41560, PETRI_PLACES=747, PETRI_TRANSITIONS=1536} [2022-07-19 21:41:44,273 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 671 predicate places. [2022-07-19 21:41:44,273 INFO L495 AbstractCegarLoop]: Abstraction has has 747 places, 1536 transitions, 41560 flow [2022-07-19 21:41:44,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:44,273 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:44,273 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:44,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 21:41:44,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 21:41:44,474 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:41:44,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:44,475 INFO L85 PathProgramCache]: Analyzing trace with hash -929958727, now seen corresponding path program 16 times [2022-07-19 21:41:44,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:44,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377206412] [2022-07-19 21:41:44,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:44,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:44,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:44,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:44,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377206412] [2022-07-19 21:41:44,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377206412] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:44,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275662349] [2022-07-19 21:41:44,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:41:44,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:44,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:44,516 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:41:44,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 21:41:44,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:41:44,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:41:44,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:41:44,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:44,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:44,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275662349] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:44,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:44,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-07-19 21:41:44,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186483612] [2022-07-19 21:41:44,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:44,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:41:44,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:44,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:41:44,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:41:44,723 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 86 [2022-07-19 21:41:44,723 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 747 places, 1536 transitions, 41560 flow. Second operand has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:44,723 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:44,723 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 86 [2022-07-19 21:41:44,723 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:46,083 INFO L129 PetriNetUnfolder]: 1069/3417 cut-off events. [2022-07-19 21:41:46,083 INFO L130 PetriNetUnfolder]: For 141639/141786 co-relation queries the response was YES. [2022-07-19 21:41:46,128 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35802 conditions, 3417 events. 1069/3417 cut-off events. For 141639/141786 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 30981 event pairs, 57 based on Foata normal form. 45/3447 useless extension candidates. Maximal degree in co-relation 35633. Up to 1010 conditions per place. [2022-07-19 21:41:46,151 INFO L132 encePairwiseOnDemand]: 81/86 looper letters, 412 selfloop transitions, 552 changer transitions 0/1522 dead transitions. [2022-07-19 21:41:46,151 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 716 places, 1522 transitions, 43430 flow [2022-07-19 21:41:46,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:41:46,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:41:46,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 361 transitions. [2022-07-19 21:41:46,152 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8395348837209302 [2022-07-19 21:41:46,152 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 361 transitions. [2022-07-19 21:41:46,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 361 transitions. [2022-07-19 21:41:46,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:46,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 361 transitions. [2022-07-19 21:41:46,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.2) internal successors, (361), 5 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:46,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 86.0) internal successors, (516), 6 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:46,153 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 86.0) internal successors, (516), 6 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:46,153 INFO L186 Difference]: Start difference. First operand has 747 places, 1536 transitions, 41560 flow. Second operand 5 states and 361 transitions. [2022-07-19 21:41:46,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 716 places, 1522 transitions, 43430 flow [2022-07-19 21:41:47,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 689 places, 1522 transitions, 43044 flow, removed 47 selfloop flow, removed 27 redundant places. [2022-07-19 21:41:47,438 INFO L242 Difference]: Finished difference. Result has 691 places, 1514 transitions, 43095 flow [2022-07-19 21:41:47,439 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=40325, PETRI_DIFFERENCE_MINUEND_PLACES=685, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=534, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=944, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=43095, PETRI_PLACES=691, PETRI_TRANSITIONS=1514} [2022-07-19 21:41:47,440 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 615 predicate places. [2022-07-19 21:41:47,440 INFO L495 AbstractCegarLoop]: Abstraction has has 691 places, 1514 transitions, 43095 flow [2022-07-19 21:41:47,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:47,440 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:47,440 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:47,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 21:41:47,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:47,641 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:41:47,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:47,641 INFO L85 PathProgramCache]: Analyzing trace with hash 995476421, now seen corresponding path program 17 times [2022-07-19 21:41:47,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:47,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230526971] [2022-07-19 21:41:47,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:47,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:47,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:47,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230526971] [2022-07-19 21:41:47,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230526971] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:47,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757607209] [2022-07-19 21:41:47,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:41:47,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:47,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:47,844 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:41:47,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 21:41:47,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:41:47,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:41:47,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:41:47,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:48,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:48,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:48,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757607209] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:48,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:48,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-07-19 21:41:48,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821810861] [2022-07-19 21:41:48,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:48,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-19 21:41:48,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:48,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-19 21:41:48,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2022-07-19 21:41:48,633 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-19 21:41:48,635 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 691 places, 1514 transitions, 43095 flow. Second operand has 31 states, 31 states have (on average 52.903225806451616) internal successors, (1640), 31 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:48,635 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:48,635 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-19 21:41:48,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:52,194 INFO L129 PetriNetUnfolder]: 1406/4370 cut-off events. [2022-07-19 21:41:52,195 INFO L130 PetriNetUnfolder]: For 194607/194607 co-relation queries the response was YES. [2022-07-19 21:41:52,252 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49433 conditions, 4370 events. 1406/4370 cut-off events. For 194607/194607 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 41410 event pairs, 76 based on Foata normal form. 5/4367 useless extension candidates. Maximal degree in co-relation 49271. Up to 1755 conditions per place. [2022-07-19 21:41:52,284 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 809 selfloop transitions, 1127 changer transitions 32/2009 dead transitions. [2022-07-19 21:41:52,284 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 739 places, 2009 transitions, 61491 flow [2022-07-19 21:41:52,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-19 21:41:52,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-07-19 21:41:52,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2703 transitions. [2022-07-19 21:41:52,286 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6414333175130518 [2022-07-19 21:41:52,286 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2703 transitions. [2022-07-19 21:41:52,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2703 transitions. [2022-07-19 21:41:52,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:52,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2703 transitions. [2022-07-19 21:41:52,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 55.16326530612245) internal successors, (2703), 49 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:52,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:52,291 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:52,291 INFO L186 Difference]: Start difference. First operand has 691 places, 1514 transitions, 43095 flow. Second operand 49 states and 2703 transitions. [2022-07-19 21:41:52,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 739 places, 2009 transitions, 61491 flow [2022-07-19 21:41:54,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 737 places, 2009 transitions, 61258 flow, removed 106 selfloop flow, removed 2 redundant places. [2022-07-19 21:41:54,251 INFO L242 Difference]: Finished difference. Result has 773 places, 1870 transitions, 59331 flow [2022-07-19 21:41:54,253 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=43050, PETRI_DIFFERENCE_MINUEND_PLACES=689, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=795, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=59331, PETRI_PLACES=773, PETRI_TRANSITIONS=1870} [2022-07-19 21:41:54,253 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 697 predicate places. [2022-07-19 21:41:54,253 INFO L495 AbstractCegarLoop]: Abstraction has has 773 places, 1870 transitions, 59331 flow [2022-07-19 21:41:54,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 52.903225806451616) internal successors, (1640), 31 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:54,253 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:54,254 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:54,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-19 21:41:54,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:54,454 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:41:54,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:54,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1420095517, now seen corresponding path program 18 times [2022-07-19 21:41:54,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:54,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757991061] [2022-07-19 21:41:54,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:54,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:54,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:54,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:54,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757991061] [2022-07-19 21:41:54,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757991061] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:54,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908237826] [2022-07-19 21:41:54,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:41:54,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:54,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:54,622 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:41:54,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 21:41:54,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-19 21:41:54,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:41:54,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:41:54,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:54,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:54,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:55,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:55,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908237826] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:55,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:55,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-19 21:41:55,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751659237] [2022-07-19 21:41:55,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:55,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-19 21:41:55,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:55,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-19 21:41:55,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2022-07-19 21:41:55,368 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-19 21:41:55,369 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 773 places, 1870 transitions, 59331 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:55,369 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:55,369 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-19 21:41:55,369 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:42:00,947 INFO L129 PetriNetUnfolder]: 1631/5089 cut-off events. [2022-07-19 21:42:00,947 INFO L130 PetriNetUnfolder]: For 259549/259561 co-relation queries the response was YES. [2022-07-19 21:42:01,029 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62648 conditions, 5089 events. 1631/5089 cut-off events. For 259549/259561 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 49827 event pairs, 90 based on Foata normal form. 11/5092 useless extension candidates. Maximal degree in co-relation 62450. Up to 1815 conditions per place. [2022-07-19 21:42:01,070 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 849 selfloop transitions, 1411 changer transitions 33/2334 dead transitions. [2022-07-19 21:42:01,070 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 827 places, 2334 transitions, 78344 flow [2022-07-19 21:42:01,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-19 21:42:01,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-07-19 21:42:01,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3567 transitions. [2022-07-19 21:42:01,073 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6381037567084079 [2022-07-19 21:42:01,074 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3567 transitions. [2022-07-19 21:42:01,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3567 transitions. [2022-07-19 21:42:01,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:42:01,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3567 transitions. [2022-07-19 21:42:01,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 54.87692307692308) internal successors, (3567), 65 states have internal predecessors, (3567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:01,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:01,082 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:01,082 INFO L186 Difference]: Start difference. First operand has 773 places, 1870 transitions, 59331 flow. Second operand 65 states and 3567 transitions. [2022-07-19 21:42:01,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 827 places, 2334 transitions, 78344 flow [2022-07-19 21:42:04,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 815 places, 2334 transitions, 77815 flow, removed 258 selfloop flow, removed 12 redundant places. [2022-07-19 21:42:04,348 INFO L242 Difference]: Finished difference. Result has 848 places, 2191 transitions, 76007 flow [2022-07-19 21:42:04,350 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=58949, PETRI_DIFFERENCE_MINUEND_PLACES=751, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1870, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=76007, PETRI_PLACES=848, PETRI_TRANSITIONS=2191} [2022-07-19 21:42:04,350 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 772 predicate places. [2022-07-19 21:42:04,351 INFO L495 AbstractCegarLoop]: Abstraction has has 848 places, 2191 transitions, 76007 flow [2022-07-19 21:42:04,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:04,351 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:42:04,351 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:42:04,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-19 21:42:04,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:42:04,561 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:42:04,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:42:04,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1159818561, now seen corresponding path program 19 times [2022-07-19 21:42:04,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:42:04,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716429967] [2022-07-19 21:42:04,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:42:04,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:42:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:42:04,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:42:04,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:42:04,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716429967] [2022-07-19 21:42:04,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716429967] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:42:04,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829788529] [2022-07-19 21:42:04,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 21:42:04,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:42:04,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:42:04,725 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:42:04,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 21:42:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:42:04,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:42:04,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:42:05,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:42:05,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:42:05,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:42:05,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829788529] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:42:05,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:42:05,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-19 21:42:05,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432162638] [2022-07-19 21:42:05,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:42:05,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-19 21:42:05,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:42:05,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-19 21:42:05,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2022-07-19 21:42:05,366 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-19 21:42:05,366 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 848 places, 2191 transitions, 76007 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:05,366 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:42:05,367 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-19 21:42:05,367 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:42:13,829 INFO L129 PetriNetUnfolder]: 1676/5310 cut-off events. [2022-07-19 21:42:13,829 INFO L130 PetriNetUnfolder]: For 334963/334968 co-relation queries the response was YES. [2022-07-19 21:42:13,903 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69593 conditions, 5310 events. 1676/5310 cut-off events. For 334963/334968 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 52591 event pairs, 81 based on Foata normal form. 6/5308 useless extension candidates. Maximal degree in co-relation 69372. Up to 1696 conditions per place. [2022-07-19 21:42:13,947 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 893 selfloop transitions, 1476 changer transitions 53/2463 dead transitions. [2022-07-19 21:42:13,947 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 898 places, 2463 transitions, 89191 flow [2022-07-19 21:42:13,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-19 21:42:13,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-19 21:42:13,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3353 transitions. [2022-07-19 21:42:13,950 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6391536408692337 [2022-07-19 21:42:13,950 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3353 transitions. [2022-07-19 21:42:13,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3353 transitions. [2022-07-19 21:42:13,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:42:13,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3353 transitions. [2022-07-19 21:42:13,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 54.967213114754095) internal successors, (3353), 61 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:13,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 86.0) internal successors, (5332), 62 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:13,957 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 86.0) internal successors, (5332), 62 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:13,957 INFO L186 Difference]: Start difference. First operand has 848 places, 2191 transitions, 76007 flow. Second operand 61 states and 3353 transitions. [2022-07-19 21:42:13,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 898 places, 2463 transitions, 89191 flow [2022-07-19 21:42:17,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 886 places, 2463 transitions, 88209 flow, removed 443 selfloop flow, removed 12 redundant places. [2022-07-19 21:42:17,287 INFO L242 Difference]: Finished difference. Result has 908 places, 2297 transitions, 84757 flow [2022-07-19 21:42:17,289 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=75207, PETRI_DIFFERENCE_MINUEND_PLACES=826, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=776, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=84757, PETRI_PLACES=908, PETRI_TRANSITIONS=2297} [2022-07-19 21:42:17,289 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 832 predicate places. [2022-07-19 21:42:17,289 INFO L495 AbstractCegarLoop]: Abstraction has has 908 places, 2297 transitions, 84757 flow [2022-07-19 21:42:17,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:17,290 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:42:17,290 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:42:17,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-19 21:42:17,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:42:17,491 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:42:17,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:42:17,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1306414141, now seen corresponding path program 20 times [2022-07-19 21:42:17,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:42:17,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617140789] [2022-07-19 21:42:17,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:42:17,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:42:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:42:17,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:42:17,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:42:17,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617140789] [2022-07-19 21:42:17,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617140789] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:42:17,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390389730] [2022-07-19 21:42:17,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:42:17,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:42:17,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:42:17,659 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:42:17,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-19 21:42:17,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:42:17,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:42:17,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:42:17,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:42:17,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:42:17,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:42:18,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:42:18,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390389730] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:42:18,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:42:18,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-07-19 21:42:18,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897952364] [2022-07-19 21:42:18,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:42:18,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-19 21:42:18,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:42:18,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-19 21:42:18,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2022-07-19 21:42:18,367 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-19 21:42:18,368 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 908 places, 2297 transitions, 84757 flow. Second operand has 31 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:18,368 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:42:18,368 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-19 21:42:18,368 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:42:26,414 INFO L129 PetriNetUnfolder]: 1701/5368 cut-off events. [2022-07-19 21:42:26,414 INFO L130 PetriNetUnfolder]: For 372076/372088 co-relation queries the response was YES. [2022-07-19 21:42:26,513 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74181 conditions, 5368 events. 1701/5368 cut-off events. For 372076/372088 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 53175 event pairs, 87 based on Foata normal form. 9/5358 useless extension candidates. Maximal degree in co-relation 73948. Up to 2260 conditions per place. [2022-07-19 21:42:26,575 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 1050 selfloop transitions, 1478 changer transitions 24/2593 dead transitions. [2022-07-19 21:42:26,575 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 970 places, 2593 transitions, 99038 flow [2022-07-19 21:42:26,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-19 21:42:26,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-07-19 21:42:26,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 4001 transitions. [2022-07-19 21:42:26,580 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6373048741637464 [2022-07-19 21:42:26,580 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 4001 transitions. [2022-07-19 21:42:26,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 4001 transitions. [2022-07-19 21:42:26,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:42:26,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 4001 transitions. [2022-07-19 21:42:26,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 54.80821917808219) internal successors, (4001), 73 states have internal predecessors, (4001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:26,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 86.0) internal successors, (6364), 74 states have internal predecessors, (6364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:26,596 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 86.0) internal successors, (6364), 74 states have internal predecessors, (6364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:26,596 INFO L186 Difference]: Start difference. First operand has 908 places, 2297 transitions, 84757 flow. Second operand 73 states and 4001 transitions. [2022-07-19 21:42:26,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 970 places, 2593 transitions, 99038 flow [2022-07-19 21:42:31,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 941 places, 2593 transitions, 97949 flow, removed 423 selfloop flow, removed 29 redundant places. [2022-07-19 21:42:31,247 INFO L242 Difference]: Finished difference. Result has 971 places, 2474 transitions, 95826 flow [2022-07-19 21:42:31,249 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=84095, PETRI_DIFFERENCE_MINUEND_PLACES=869, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=859, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=95826, PETRI_PLACES=971, PETRI_TRANSITIONS=2474} [2022-07-19 21:42:31,249 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 895 predicate places. [2022-07-19 21:42:31,249 INFO L495 AbstractCegarLoop]: Abstraction has has 971 places, 2474 transitions, 95826 flow [2022-07-19 21:42:31,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:31,250 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:42:31,250 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:42:31,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-19 21:42:31,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-19 21:42:31,451 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:42:31,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:42:31,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1839589707, now seen corresponding path program 21 times [2022-07-19 21:42:31,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:42:31,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576937238] [2022-07-19 21:42:31,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:42:31,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:42:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:42:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:42:31,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:42:31,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576937238] [2022-07-19 21:42:31,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576937238] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:42:31,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844899176] [2022-07-19 21:42:31,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:42:31,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:42:31,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:42:31,609 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:42:31,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-19 21:42:31,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 21:42:31,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:42:31,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:42:31,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:42:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:42:31,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:42:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:42:32,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844899176] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:42:32,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:42:32,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-19 21:42:32,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074039863] [2022-07-19 21:42:32,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:42:32,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-19 21:42:32,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:42:32,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-19 21:42:32,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2022-07-19 21:42:32,297 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-19 21:42:32,298 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 971 places, 2474 transitions, 95826 flow. Second operand has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:32,298 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:42:32,298 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-19 21:42:32,298 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:42:42,370 INFO L129 PetriNetUnfolder]: 1920/6029 cut-off events. [2022-07-19 21:42:42,370 INFO L130 PetriNetUnfolder]: For 488353/488358 co-relation queries the response was YES. [2022-07-19 21:42:42,474 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87935 conditions, 6029 events. 1920/6029 cut-off events. For 488353/488358 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 60995 event pairs, 88 based on Foata normal form. 8/6018 useless extension candidates. Maximal degree in co-relation 87697. Up to 2325 conditions per place. [2022-07-19 21:42:42,528 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 1171 selfloop transitions, 1743 changer transitions 19/2974 dead transitions. [2022-07-19 21:42:42,529 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1046 places, 2974 transitions, 120126 flow [2022-07-19 21:42:42,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-19 21:42:42,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2022-07-19 21:42:42,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 4694 transitions. [2022-07-19 21:42:42,533 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6346673877771769 [2022-07-19 21:42:42,533 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 4694 transitions. [2022-07-19 21:42:42,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 4694 transitions. [2022-07-19 21:42:42,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:42:42,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 4694 transitions. [2022-07-19 21:42:42,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 54.58139534883721) internal successors, (4694), 86 states have internal predecessors, (4694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:42,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 86.0) internal successors, (7482), 87 states have internal predecessors, (7482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:42,544 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 86.0) internal successors, (7482), 87 states have internal predecessors, (7482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:42,544 INFO L186 Difference]: Start difference. First operand has 971 places, 2474 transitions, 95826 flow. Second operand 86 states and 4694 transitions. [2022-07-19 21:42:42,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1046 places, 2974 transitions, 120126 flow [2022-07-19 21:42:48,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1014 places, 2974 transitions, 117968 flow, removed 979 selfloop flow, removed 32 redundant places. [2022-07-19 21:42:48,224 INFO L242 Difference]: Finished difference. Result has 1061 places, 2836 transitions, 116241 flow [2022-07-19 21:42:48,226 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=94873, PETRI_DIFFERENCE_MINUEND_PLACES=929, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1410, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=910, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=116241, PETRI_PLACES=1061, PETRI_TRANSITIONS=2836} [2022-07-19 21:42:48,226 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 985 predicate places. [2022-07-19 21:42:48,226 INFO L495 AbstractCegarLoop]: Abstraction has has 1061 places, 2836 transitions, 116241 flow [2022-07-19 21:42:48,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:48,227 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:42:48,227 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:42:48,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-19 21:42:48,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-19 21:42:48,441 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:42:48,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:42:48,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1606411847, now seen corresponding path program 22 times [2022-07-19 21:42:48,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:42:48,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597007251] [2022-07-19 21:42:48,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:42:48,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:42:48,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:42:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:42:48,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:42:48,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597007251] [2022-07-19 21:42:48,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597007251] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:42:48,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404422379] [2022-07-19 21:42:48,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:42:48,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:42:48,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:42:48,636 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:42:48,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-19 21:42:48,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:42:48,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:42:48,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:42:48,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:42:48,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:42:48,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:42:49,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:42:49,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404422379] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:42:49,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:42:49,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-19 21:42:49,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669077097] [2022-07-19 21:42:49,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:42:49,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-19 21:42:49,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:42:49,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-19 21:42:49,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2022-07-19 21:42:49,357 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-19 21:42:49,357 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1061 places, 2836 transitions, 116241 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:49,357 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:42:49,357 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-19 21:42:49,358 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:42:59,029 INFO L129 PetriNetUnfolder]: 1965/6117 cut-off events. [2022-07-19 21:42:59,030 INFO L130 PetriNetUnfolder]: For 518413/518425 co-relation queries the response was YES. [2022-07-19 21:42:59,140 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93511 conditions, 6117 events. 1965/6117 cut-off events. For 518413/518425 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 61774 event pairs, 90 based on Foata normal form. 11/6108 useless extension candidates. Maximal degree in co-relation 93236. Up to 2253 conditions per place. [2022-07-19 21:42:59,194 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 1204 selfloop transitions, 1743 changer transitions 37/3025 dead transitions. [2022-07-19 21:42:59,195 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1118 places, 3025 transitions, 128570 flow [2022-07-19 21:42:59,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-19 21:42:59,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-07-19 21:42:59,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3662 transitions. [2022-07-19 21:42:59,202 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6355432141617494 [2022-07-19 21:42:59,202 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3662 transitions. [2022-07-19 21:42:59,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3662 transitions. [2022-07-19 21:42:59,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:42:59,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3662 transitions. [2022-07-19 21:42:59,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 54.656716417910445) internal successors, (3662), 67 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:59,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 86.0) internal successors, (5848), 68 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:59,210 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 86.0) internal successors, (5848), 68 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:59,210 INFO L186 Difference]: Start difference. First operand has 1061 places, 2836 transitions, 116241 flow. Second operand 67 states and 3662 transitions. [2022-07-19 21:42:59,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1118 places, 3025 transitions, 128570 flow [2022-07-19 21:43:06,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1091 places, 3025 transitions, 125655 flow, removed 1221 selfloop flow, removed 27 redundant places. [2022-07-19 21:43:06,964 INFO L242 Difference]: Finished difference. Result has 1117 places, 2896 transitions, 123291 flow [2022-07-19 21:43:06,966 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=113944, PETRI_DIFFERENCE_MINUEND_PLACES=1025, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2836, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1674, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=123291, PETRI_PLACES=1117, PETRI_TRANSITIONS=2896} [2022-07-19 21:43:06,966 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 1041 predicate places. [2022-07-19 21:43:06,967 INFO L495 AbstractCegarLoop]: Abstraction has has 1117 places, 2896 transitions, 123291 flow [2022-07-19 21:43:06,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:43:06,967 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:43:06,967 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:43:06,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-19 21:43:07,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:43:07,168 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:43:07,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:43:07,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1025476009, now seen corresponding path program 23 times [2022-07-19 21:43:07,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:43:07,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679482854] [2022-07-19 21:43:07,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:43:07,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:43:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:43:07,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:43:07,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:43:07,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679482854] [2022-07-19 21:43:07,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679482854] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:43:07,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084670730] [2022-07-19 21:43:07,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:43:07,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:43:07,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:43:07,419 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:43:07,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-19 21:43:07,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:43:07,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:43:07,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:43:07,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:43:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:43:07,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:43:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:43:08,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084670730] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:43:08,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:43:08,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-19 21:43:08,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600047611] [2022-07-19 21:43:08,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:43:08,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-19 21:43:08,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:43:08,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-19 21:43:08,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2022-07-19 21:43:08,104 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-19 21:43:08,104 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1117 places, 2896 transitions, 123291 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:43:08,104 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:43:08,105 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-19 21:43:08,105 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:43:17,990 INFO L129 PetriNetUnfolder]: 2023/6196 cut-off events. [2022-07-19 21:43:17,991 INFO L130 PetriNetUnfolder]: For 484548/484553 co-relation queries the response was YES. [2022-07-19 21:43:18,113 INFO L84 FinitePrefix]: Finished finitePrefix Result has 97048 conditions, 6196 events. 2023/6196 cut-off events. For 484548/484553 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 62412 event pairs, 91 based on Foata normal form. 5/6182 useless extension candidates. Maximal degree in co-relation 96761. Up to 2709 conditions per place. [2022-07-19 21:43:18,172 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 1426 selfloop transitions, 1616 changer transitions 8/3091 dead transitions. [2022-07-19 21:43:18,172 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1137 places, 3091 transitions, 136138 flow [2022-07-19 21:43:18,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-19 21:43:18,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-19 21:43:18,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1986 transitions. [2022-07-19 21:43:18,174 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6414728682170543 [2022-07-19 21:43:18,174 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1986 transitions. [2022-07-19 21:43:18,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1986 transitions. [2022-07-19 21:43:18,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:43:18,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1986 transitions. [2022-07-19 21:43:18,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.166666666666664) internal successors, (1986), 36 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:43:18,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 86.0) internal successors, (3182), 37 states have internal predecessors, (3182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:43:18,180 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 86.0) internal successors, (3182), 37 states have internal predecessors, (3182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:43:18,180 INFO L186 Difference]: Start difference. First operand has 1117 places, 2896 transitions, 123291 flow. Second operand 36 states and 1986 transitions. [2022-07-19 21:43:18,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1137 places, 3091 transitions, 136138 flow [2022-07-19 21:43:25,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1103 places, 3091 transitions, 135349 flow, removed 91 selfloop flow, removed 34 redundant places. [2022-07-19 21:43:25,295 INFO L242 Difference]: Finished difference. Result has 1112 places, 2971 transitions, 129492 flow [2022-07-19 21:43:25,298 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=122623, PETRI_DIFFERENCE_MINUEND_PLACES=1068, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2896, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1540, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=129492, PETRI_PLACES=1112, PETRI_TRANSITIONS=2971} [2022-07-19 21:43:25,299 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 1036 predicate places. [2022-07-19 21:43:25,299 INFO L495 AbstractCegarLoop]: Abstraction has has 1112 places, 2971 transitions, 129492 flow [2022-07-19 21:43:25,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:43:25,300 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:43:25,300 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:43:25,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-19 21:43:25,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:43:25,515 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:43:25,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:43:25,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1707648643, now seen corresponding path program 24 times [2022-07-19 21:43:25,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:43:25,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19049526] [2022-07-19 21:43:25,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:43:25,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:43:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:43:25,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:43:25,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:43:25,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19049526] [2022-07-19 21:43:25,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19049526] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:43:25,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892643734] [2022-07-19 21:43:25,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:43:25,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:43:25,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:43:25,684 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:43:25,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-19 21:43:25,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-19 21:43:25,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:43:25,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:43:25,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:43:26,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:43:26,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:43:26,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:43:26,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892643734] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:43:26,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:43:26,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-19 21:43:26,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023781621] [2022-07-19 21:43:26,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:43:26,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-19 21:43:26,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:43:26,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-19 21:43:26,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2022-07-19 21:43:26,360 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-19 21:43:26,361 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1112 places, 2971 transitions, 129492 flow. Second operand has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:43:26,361 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:43:26,361 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-19 21:43:26,361 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:43:37,765 INFO L129 PetriNetUnfolder]: 2100/6439 cut-off events. [2022-07-19 21:43:37,766 INFO L130 PetriNetUnfolder]: For 527383/527395 co-relation queries the response was YES. [2022-07-19 21:43:38,031 INFO L84 FinitePrefix]: Finished finitePrefix Result has 102412 conditions, 6439 events. 2100/6439 cut-off events. For 527383/527395 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 65284 event pairs, 77 based on Foata normal form. 7/6426 useless extension candidates. Maximal degree in co-relation 102126. Up to 1857 conditions per place. [2022-07-19 21:43:38,095 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 1368 selfloop transitions, 1814 changer transitions 12/3235 dead transitions. [2022-07-19 21:43:38,095 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1184 places, 3235 transitions, 146186 flow [2022-07-19 21:43:38,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-07-19 21:43:38,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2022-07-19 21:43:38,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4154 transitions. [2022-07-19 21:43:38,098 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6355569155446756 [2022-07-19 21:43:38,098 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4154 transitions. [2022-07-19 21:43:38,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4154 transitions. [2022-07-19 21:43:38,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:43:38,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4154 transitions. [2022-07-19 21:43:38,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 54.6578947368421) internal successors, (4154), 76 states have internal predecessors, (4154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:43:38,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 86.0) internal successors, (6622), 77 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:43:38,104 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 86.0) internal successors, (6622), 77 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:43:38,105 INFO L186 Difference]: Start difference. First operand has 1112 places, 2971 transitions, 129492 flow. Second operand 76 states and 4154 transitions. [2022-07-19 21:43:38,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1184 places, 3235 transitions, 146186 flow [2022-07-19 21:43:45,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1167 places, 3235 transitions, 145752 flow, removed 70 selfloop flow, removed 17 redundant places. [2022-07-19 21:43:45,459 INFO L242 Difference]: Finished difference. Result has 1191 places, 3109 transitions, 141016 flow [2022-07-19 21:43:45,461 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=129088, PETRI_DIFFERENCE_MINUEND_PLACES=1092, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2971, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1679, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=141016, PETRI_PLACES=1191, PETRI_TRANSITIONS=3109} [2022-07-19 21:43:45,462 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 1115 predicate places. [2022-07-19 21:43:45,462 INFO L495 AbstractCegarLoop]: Abstraction has has 1191 places, 3109 transitions, 141016 flow [2022-07-19 21:43:45,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:43:45,462 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:43:45,462 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:43:45,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-19 21:43:45,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-19 21:43:45,663 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:43:45,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:43:45,663 INFO L85 PathProgramCache]: Analyzing trace with hash 391613489, now seen corresponding path program 25 times [2022-07-19 21:43:45,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:43:45,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998383930] [2022-07-19 21:43:45,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:43:45,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:43:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:43:45,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:43:45,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:43:45,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998383930] [2022-07-19 21:43:45,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998383930] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:43:45,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124891545] [2022-07-19 21:43:45,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 21:43:45,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:43:45,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:43:45,856 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:43:45,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-19 21:43:45,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:43:45,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:43:45,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:43:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:43:46,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:43:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:43:46,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124891545] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:43:46,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:43:46,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-19 21:43:46,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756414207] [2022-07-19 21:43:46,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:43:46,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-19 21:43:46,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:43:46,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-19 21:43:46,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2022-07-19 21:43:46,544 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-19 21:43:46,545 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1191 places, 3109 transitions, 141016 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:43:46,545 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:43:46,545 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-19 21:43:46,545 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:43:57,803 INFO L129 PetriNetUnfolder]: 2100/6437 cut-off events. [2022-07-19 21:43:57,803 INFO L130 PetriNetUnfolder]: For 614118/614130 co-relation queries the response was YES. [2022-07-19 21:43:57,942 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107011 conditions, 6437 events. 2100/6437 cut-off events. For 614118/614130 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 65343 event pairs, 81 based on Foata normal form. 9/6430 useless extension candidates. Maximal degree in co-relation 106707. Up to 1893 conditions per place. [2022-07-19 21:43:58,015 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 1060 selfloop transitions, 2089 changer transitions 21/3211 dead transitions. [2022-07-19 21:43:58,015 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1255 places, 3211 transitions, 150677 flow [2022-07-19 21:43:58,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-19 21:43:58,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-07-19 21:43:58,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 3882 transitions. [2022-07-19 21:43:58,019 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6357680969538159 [2022-07-19 21:43:58,020 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 3882 transitions. [2022-07-19 21:43:58,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 3882 transitions. [2022-07-19 21:43:58,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:43:58,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 3882 transitions. [2022-07-19 21:43:58,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 54.67605633802817) internal successors, (3882), 71 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:43:58,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 86.0) internal successors, (6192), 72 states have internal predecessors, (6192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:43:58,030 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 86.0) internal successors, (6192), 72 states have internal predecessors, (6192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:43:58,030 INFO L186 Difference]: Start difference. First operand has 1191 places, 3109 transitions, 141016 flow. Second operand 71 states and 3882 transitions. [2022-07-19 21:43:58,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1255 places, 3211 transitions, 150677 flow [2022-07-19 21:44:07,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1222 places, 3211 transitions, 148588 flow, removed 848 selfloop flow, removed 33 redundant places. [2022-07-19 21:44:07,277 INFO L242 Difference]: Finished difference. Result has 1229 places, 3107 transitions, 143510 flow [2022-07-19 21:44:07,280 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=139132, PETRI_DIFFERENCE_MINUEND_PLACES=1152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2085, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1024, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=143510, PETRI_PLACES=1229, PETRI_TRANSITIONS=3107} [2022-07-19 21:44:07,280 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 1153 predicate places. [2022-07-19 21:44:07,281 INFO L495 AbstractCegarLoop]: Abstraction has has 1229 places, 3107 transitions, 143510 flow [2022-07-19 21:44:07,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:07,281 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:07,281 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:44:07,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-19 21:44:07,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-19 21:44:07,485 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:07,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:07,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1193111131, now seen corresponding path program 26 times [2022-07-19 21:44:07,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:07,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365562068] [2022-07-19 21:44:07,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:07,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:07,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:07,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:07,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365562068] [2022-07-19 21:44:07,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365562068] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:44:07,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268034253] [2022-07-19 21:44:07,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:44:07,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:07,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:44:07,732 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:44:07,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-19 21:44:07,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:44:07,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:44:07,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:44:07,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:44:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:08,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:44:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:08,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268034253] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:44:08,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:44:08,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-19 21:44:08,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714358639] [2022-07-19 21:44:08,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:44:08,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-19 21:44:08,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:08,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-19 21:44:08,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2022-07-19 21:44:08,472 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-19 21:44:08,473 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1229 places, 3107 transitions, 143510 flow. Second operand has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:08,473 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:08,473 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-19 21:44:08,473 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:20,555 INFO L129 PetriNetUnfolder]: 2161/6543 cut-off events. [2022-07-19 21:44:20,556 INFO L130 PetriNetUnfolder]: For 633051/633056 co-relation queries the response was YES. [2022-07-19 21:44:20,706 INFO L84 FinitePrefix]: Finished finitePrefix Result has 111366 conditions, 6543 events. 2161/6543 cut-off events. For 633051/633056 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 66248 event pairs, 87 based on Foata normal form. 6/6529 useless extension candidates. Maximal degree in co-relation 111065. Up to 3000 conditions per place. [2022-07-19 21:44:20,856 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 1281 selfloop transitions, 2038 changer transitions 12/3372 dead transitions. [2022-07-19 21:44:20,857 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1271 places, 3372 transitions, 159103 flow [2022-07-19 21:44:20,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-19 21:44:20,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-07-19 21:44:20,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3012 transitions. [2022-07-19 21:44:20,859 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6367864693446089 [2022-07-19 21:44:20,859 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3012 transitions. [2022-07-19 21:44:20,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3012 transitions. [2022-07-19 21:44:20,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:20,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3012 transitions. [2022-07-19 21:44:20,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 54.763636363636365) internal successors, (3012), 55 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:20,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 86.0) internal successors, (4816), 56 states have internal predecessors, (4816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:20,864 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 86.0) internal successors, (4816), 56 states have internal predecessors, (4816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:20,864 INFO L186 Difference]: Start difference. First operand has 1229 places, 3107 transitions, 143510 flow. Second operand 55 states and 3012 transitions. [2022-07-19 21:44:20,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1271 places, 3372 transitions, 159103 flow [2022-07-19 21:44:30,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1217 places, 3372 transitions, 156223 flow, removed 154 selfloop flow, removed 54 redundant places. [2022-07-19 21:44:30,684 INFO L242 Difference]: Finished difference. Result has 1238 places, 3279 transitions, 153027 flow [2022-07-19 21:44:30,686 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=140798, PETRI_DIFFERENCE_MINUEND_PLACES=1163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1880, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=153027, PETRI_PLACES=1238, PETRI_TRANSITIONS=3279} [2022-07-19 21:44:30,687 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 1162 predicate places. [2022-07-19 21:44:30,687 INFO L495 AbstractCegarLoop]: Abstraction has has 1238 places, 3279 transitions, 153027 flow [2022-07-19 21:44:30,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:30,688 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:30,688 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:44:30,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-19 21:44:30,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-19 21:44:30,898 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:30,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:30,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1442126069, now seen corresponding path program 27 times [2022-07-19 21:44:30,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:30,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478564526] [2022-07-19 21:44:30,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:30,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:31,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:31,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478564526] [2022-07-19 21:44:31,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478564526] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:44:31,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747542989] [2022-07-19 21:44:31,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:44:31,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:31,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:44:31,125 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:44:31,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-19 21:44:31,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 21:44:31,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:44:31,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:44:31,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:44:31,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:31,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:44:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:31,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747542989] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:44:31,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:44:31,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-19 21:44:31,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911740616] [2022-07-19 21:44:31,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:44:31,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-19 21:44:31,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:31,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-19 21:44:31,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2022-07-19 21:44:31,767 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-19 21:44:31,768 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1238 places, 3279 transitions, 153027 flow. Second operand has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:31,768 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:31,768 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-19 21:44:31,768 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand