./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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-queue-add-3.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 22:19:22,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:19:22,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:19:22,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:19:22,506 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:19:22,507 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:19:22,509 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:19:22,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:19:22,511 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:19:22,515 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:19:22,516 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:19:22,517 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:19:22,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:19:22,519 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:19:22,519 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:19:22,522 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:19:22,523 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:19:22,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:19:22,525 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:19:22,530 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:19:22,532 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:19:22,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:19:22,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:19:22,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:19:22,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:19:22,540 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:19:22,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:19:22,541 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:19:22,541 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:19:22,542 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:19:22,542 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:19:22,543 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:19:22,544 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:19:22,544 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:19:22,545 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:19:22,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:19:22,545 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:19:22,546 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:19:22,546 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:19:22,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:19:22,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:19:22,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:19:22,549 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 22:19:22,570 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:19:22,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:19:22,571 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:19:22,571 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:19:22,571 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:19:22,571 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:19:22,572 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:19:22,572 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:19:22,572 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:19:22,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:19:22,573 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 22:19:22,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:19:22,573 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 22:19:22,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:19:22,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:19:22,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:19:22,574 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:19:22,574 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 22:19:22,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:19:22,574 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:19:22,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:19:22,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:19:22,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:19:22,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:19:22,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:19:22,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:19:22,576 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:19:22,576 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:19:22,577 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:19:22,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:19:22,577 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:19:22,577 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:19:22,577 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:19:22,577 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 [2022-07-13 22:19:22,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:19:22,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:19:22,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:19:22,801 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:19:22,802 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:19:22,803 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2022-07-13 22:19:22,840 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70b3f1144/e66c82a2137941c2bd40497164ab4935/FLAG5898f6c36 [2022-07-13 22:19:23,265 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:19:23,265 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2022-07-13 22:19:23,272 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70b3f1144/e66c82a2137941c2bd40497164ab4935/FLAG5898f6c36 [2022-07-13 22:19:23,286 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70b3f1144/e66c82a2137941c2bd40497164ab4935 [2022-07-13 22:19:23,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:19:23,289 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:19:23,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:19:23,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:19:23,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:19:23,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:19:23" (1/1) ... [2022-07-13 22:19:23,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24e9b9a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:19:23, skipping insertion in model container [2022-07-13 22:19:23,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:19:23" (1/1) ... [2022-07-13 22:19:23,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:19:23,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:19:23,506 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-queue-add-3.wvr.c[3412,3425] [2022-07-13 22:19:23,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:19:23,523 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:19:23,555 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-queue-add-3.wvr.c[3412,3425] [2022-07-13 22:19:23,561 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:19:23,571 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:19:23,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:19:23 WrapperNode [2022-07-13 22:19:23,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:19:23,573 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:19:23,573 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:19:23,573 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:19:23,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:19:23" (1/1) ... [2022-07-13 22:19:23,593 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:19:23" (1/1) ... [2022-07-13 22:19:23,620 INFO L137 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 245 [2022-07-13 22:19:23,620 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:19:23,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:19:23,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:19:23,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:19:23,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:19:23" (1/1) ... [2022-07-13 22:19:23,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:19:23" (1/1) ... [2022-07-13 22:19:23,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:19:23" (1/1) ... [2022-07-13 22:19:23,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:19:23" (1/1) ... [2022-07-13 22:19:23,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:19:23" (1/1) ... [2022-07-13 22:19:23,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:19:23" (1/1) ... [2022-07-13 22:19:23,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:19:23" (1/1) ... [2022-07-13 22:19:23,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:19:23,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:19:23,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:19:23,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:19:23,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:19:23" (1/1) ... [2022-07-13 22:19:23,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:19:23,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:19:23,711 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) [2022-07-13 22:19:23,719 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 [2022-07-13 22:19:23,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:19:23,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:19:23,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:19:23,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:19:23,736 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-13 22:19:23,737 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-13 22:19:23,737 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-13 22:19:23,737 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-13 22:19:23,737 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-13 22:19:23,737 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-13 22:19:23,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:19:23,737 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 22:19:23,737 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 22:19:23,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 22:19:23,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:19:23,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:19:23,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:19:23,739 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 22:19:23,796 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:19:23,798 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:19:24,067 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:19:24,125 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:19:24,125 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-13 22:19:24,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:19:24 BoogieIcfgContainer [2022-07-13 22:19:24,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:19:24,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:19:24,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:19:24,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:19:24,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:19:23" (1/3) ... [2022-07-13 22:19:24,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@180e1dd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:19:24, skipping insertion in model container [2022-07-13 22:19:24,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:19:23" (2/3) ... [2022-07-13 22:19:24,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@180e1dd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:19:24, skipping insertion in model container [2022-07-13 22:19:24,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:19:24" (3/3) ... [2022-07-13 22:19:24,133 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2022-07-13 22:19:24,137 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 22:19:24,144 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:19:24,144 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:19:24,144 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 22:19:24,217 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-13 22:19:24,250 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 203 places, 211 transitions, 446 flow [2022-07-13 22:19:24,314 INFO L129 PetriNetUnfolder]: 18/208 cut-off events. [2022-07-13 22:19:24,314 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-13 22:19:24,318 INFO L84 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 208 events. 18/208 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 116 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 170. Up to 3 conditions per place. [2022-07-13 22:19:24,318 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 211 transitions, 446 flow [2022-07-13 22:19:24,345 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 197 transitions, 412 flow [2022-07-13 22:19:24,353 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:19:24,359 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@37ffd2ee, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@160baab0 [2022-07-13 22:19:24,359 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-13 22:19:24,391 INFO L129 PetriNetUnfolder]: 18/196 cut-off events. [2022-07-13 22:19:24,394 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-13 22:19:24,395 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:19:24,395 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:19:24,396 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:19:24,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:19:24,401 INFO L85 PathProgramCache]: Analyzing trace with hash 322038566, now seen corresponding path program 1 times [2022-07-13 22:19:24,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:19:24,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459972066] [2022-07-13 22:19:24,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:19:24,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:19:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:24,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:19:24,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459972066] [2022-07-13 22:19:24,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459972066] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:19:24,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:19:24,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 22:19:24,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709746191] [2022-07-13 22:19:24,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:19:24,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 22:19:24,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:19:24,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 22:19:24,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 22:19:24,644 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 211 [2022-07-13 22:19:24,646 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 197 transitions, 412 flow. Second operand has 2 states, 2 states have (on average 191.0) internal successors, (382), 2 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:24,647 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:19:24,647 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 211 [2022-07-13 22:19:24,647 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:19:24,712 INFO L129 PetriNetUnfolder]: 71/370 cut-off events. [2022-07-13 22:19:24,713 INFO L130 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2022-07-13 22:19:24,714 INFO L84 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 370 events. 71/370 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1040 event pairs, 38 based on Foata normal form. 60/393 useless extension candidates. Maximal degree in co-relation 331. Up to 106 conditions per place. [2022-07-13 22:19:24,716 INFO L132 encePairwiseOnDemand]: 198/211 looper letters, 11 selfloop transitions, 0 changer transitions 6/184 dead transitions. [2022-07-13 22:19:24,716 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 184 transitions, 408 flow [2022-07-13 22:19:24,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 22:19:24,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 22:19:24,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 396 transitions. [2022-07-13 22:19:24,730 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9383886255924171 [2022-07-13 22:19:24,730 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 396 transitions. [2022-07-13 22:19:24,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 396 transitions. [2022-07-13 22:19:24,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:19:24,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 396 transitions. [2022-07-13 22:19:24,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 198.0) internal successors, (396), 2 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:24,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:24,743 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:24,744 INFO L186 Difference]: Start difference. First operand has 189 places, 197 transitions, 412 flow. Second operand 2 states and 396 transitions. [2022-07-13 22:19:24,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 184 transitions, 408 flow [2022-07-13 22:19:24,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 184 transitions, 396 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-13 22:19:24,752 INFO L242 Difference]: Finished difference. Result has 184 places, 178 transitions, 362 flow [2022-07-13 22:19:24,753 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=362, PETRI_PLACES=184, PETRI_TRANSITIONS=178} [2022-07-13 22:19:24,758 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, -5 predicate places. [2022-07-13 22:19:24,758 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 178 transitions, 362 flow [2022-07-13 22:19:24,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 191.0) internal successors, (382), 2 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:24,759 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:19:24,759 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:19:24,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:19:24,760 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:19:24,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:19:24,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1730877595, now seen corresponding path program 1 times [2022-07-13 22:19:24,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:19:24,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814487041] [2022-07-13 22:19:24,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:19:24,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:19:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:25,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:25,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:19:25,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814487041] [2022-07-13 22:19:25,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814487041] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:19:25,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:19:25,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:19:25,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284170631] [2022-07-13 22:19:25,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:19:25,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:19:25,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:19:25,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:19:25,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:19:25,016 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 211 [2022-07-13 22:19:25,017 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 178 transitions, 362 flow. Second operand has 6 states, 6 states have (on average 164.66666666666666) internal successors, (988), 6 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:25,017 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:19:25,017 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 211 [2022-07-13 22:19:25,022 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:19:25,189 INFO L129 PetriNetUnfolder]: 73/448 cut-off events. [2022-07-13 22:19:25,189 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-07-13 22:19:25,192 INFO L84 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 448 events. 73/448 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1273 event pairs, 38 based on Foata normal form. 11/424 useless extension candidates. Maximal degree in co-relation 616. Up to 118 conditions per place. [2022-07-13 22:19:25,194 INFO L132 encePairwiseOnDemand]: 199/211 looper letters, 33 selfloop transitions, 8 changer transitions 17/199 dead transitions. [2022-07-13 22:19:25,194 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 199 transitions, 523 flow [2022-07-13 22:19:25,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 22:19:25,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 22:19:25,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1501 transitions. [2022-07-13 22:19:25,198 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7904160084254871 [2022-07-13 22:19:25,198 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1501 transitions. [2022-07-13 22:19:25,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1501 transitions. [2022-07-13 22:19:25,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:19:25,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1501 transitions. [2022-07-13 22:19:25,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 166.77777777777777) internal successors, (1501), 9 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:25,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:25,205 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:25,206 INFO L186 Difference]: Start difference. First operand has 184 places, 178 transitions, 362 flow. Second operand 9 states and 1501 transitions. [2022-07-13 22:19:25,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 199 transitions, 523 flow [2022-07-13 22:19:25,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 199 transitions, 523 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:19:25,212 INFO L242 Difference]: Finished difference. Result has 188 places, 179 transitions, 394 flow [2022-07-13 22:19:25,213 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=394, PETRI_PLACES=188, PETRI_TRANSITIONS=179} [2022-07-13 22:19:25,214 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, -1 predicate places. [2022-07-13 22:19:25,214 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 179 transitions, 394 flow [2022-07-13 22:19:25,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 164.66666666666666) internal successors, (988), 6 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:25,215 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:19:25,215 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:19:25,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 22:19:25,216 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:19:25,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:19:25,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1633722547, now seen corresponding path program 1 times [2022-07-13 22:19:25,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:19:25,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673006037] [2022-07-13 22:19:25,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:19:25,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:19:25,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:25,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:19:25,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:19:25,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673006037] [2022-07-13 22:19:25,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673006037] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:19:25,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:19:25,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:19:25,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785079762] [2022-07-13 22:19:25,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:19:25,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:19:25,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:19:25,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:19:25,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:19:25,390 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 211 [2022-07-13 22:19:25,392 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 179 transitions, 394 flow. Second operand has 6 states, 6 states have (on average 165.33333333333334) internal successors, (992), 6 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:25,392 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:19:25,392 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 211 [2022-07-13 22:19:25,392 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:19:25,535 INFO L129 PetriNetUnfolder]: 92/476 cut-off events. [2022-07-13 22:19:25,535 INFO L130 PetriNetUnfolder]: For 83/95 co-relation queries the response was YES. [2022-07-13 22:19:25,536 INFO L84 FinitePrefix]: Finished finitePrefix Result has 778 conditions, 476 events. 92/476 cut-off events. For 83/95 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1566 event pairs, 50 based on Foata normal form. 15/449 useless extension candidates. Maximal degree in co-relation 772. Up to 115 conditions per place. [2022-07-13 22:19:25,538 INFO L132 encePairwiseOnDemand]: 202/211 looper letters, 36 selfloop transitions, 6 changer transitions 8/191 dead transitions. [2022-07-13 22:19:25,538 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 191 transitions, 528 flow [2022-07-13 22:19:25,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:19:25,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:19:25,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1171 transitions. [2022-07-13 22:19:25,541 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7928232904536222 [2022-07-13 22:19:25,541 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1171 transitions. [2022-07-13 22:19:25,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1171 transitions. [2022-07-13 22:19:25,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:19:25,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1171 transitions. [2022-07-13 22:19:25,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 167.28571428571428) internal successors, (1171), 7 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:25,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:25,546 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:25,546 INFO L186 Difference]: Start difference. First operand has 188 places, 179 transitions, 394 flow. Second operand 7 states and 1171 transitions. [2022-07-13 22:19:25,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 191 transitions, 528 flow [2022-07-13 22:19:25,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 191 transitions, 514 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-13 22:19:25,551 INFO L242 Difference]: Finished difference. Result has 189 places, 180 transitions, 404 flow [2022-07-13 22:19:25,552 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=404, PETRI_PLACES=189, PETRI_TRANSITIONS=180} [2022-07-13 22:19:25,553 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 0 predicate places. [2022-07-13 22:19:25,553 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 180 transitions, 404 flow [2022-07-13 22:19:25,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 165.33333333333334) internal successors, (992), 6 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:25,554 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:19:25,554 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:19:25,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 22:19:25,555 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:19:25,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:19:25,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1907862800, now seen corresponding path program 1 times [2022-07-13 22:19:25,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:19:25,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135132593] [2022-07-13 22:19:25,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:19:25,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:19:25,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:25,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:19:25,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:19:25,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135132593] [2022-07-13 22:19:25,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135132593] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:19:25,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:19:25,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:19:25,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5717845] [2022-07-13 22:19:25,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:19:25,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:19:25,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:19:25,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:19:25,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:19:25,684 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 211 [2022-07-13 22:19:25,685 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 180 transitions, 404 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 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) [2022-07-13 22:19:25,685 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:19:25,685 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 211 [2022-07-13 22:19:25,685 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:19:25,742 INFO L129 PetriNetUnfolder]: 82/405 cut-off events. [2022-07-13 22:19:25,743 INFO L130 PetriNetUnfolder]: For 84/88 co-relation queries the response was YES. [2022-07-13 22:19:25,743 INFO L84 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 405 events. 82/405 cut-off events. For 84/88 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1113 event pairs, 23 based on Foata normal form. 8/390 useless extension candidates. Maximal degree in co-relation 644. Up to 82 conditions per place. [2022-07-13 22:19:25,746 INFO L132 encePairwiseOnDemand]: 208/211 looper letters, 19 selfloop transitions, 2 changer transitions 0/186 dead transitions. [2022-07-13 22:19:25,746 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 186 transitions, 468 flow [2022-07-13 22:19:25,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:19:25,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:19:25,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 568 transitions. [2022-07-13 22:19:25,748 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8973143759873617 [2022-07-13 22:19:25,748 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 568 transitions. [2022-07-13 22:19:25,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 568 transitions. [2022-07-13 22:19:25,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:19:25,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 568 transitions. [2022-07-13 22:19:25,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:25,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:25,753 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:25,754 INFO L186 Difference]: Start difference. First operand has 189 places, 180 transitions, 404 flow. Second operand 3 states and 568 transitions. [2022-07-13 22:19:25,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 186 transitions, 468 flow [2022-07-13 22:19:25,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 186 transitions, 458 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:19:25,757 INFO L242 Difference]: Finished difference. Result has 187 places, 181 transitions, 408 flow [2022-07-13 22:19:25,760 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=408, PETRI_PLACES=187, PETRI_TRANSITIONS=181} [2022-07-13 22:19:25,761 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, -2 predicate places. [2022-07-13 22:19:25,762 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 181 transitions, 408 flow [2022-07-13 22:19:25,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 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) [2022-07-13 22:19:25,762 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:19:25,762 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:19:25,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 22:19:25,762 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:19:25,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:19:25,763 INFO L85 PathProgramCache]: Analyzing trace with hash 2022543448, now seen corresponding path program 2 times [2022-07-13 22:19:25,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:19:25,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927270568] [2022-07-13 22:19:25,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:19:25,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:19:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:25,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:19:25,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:19:25,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927270568] [2022-07-13 22:19:25,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927270568] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:19:25,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:19:25,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:19:25,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756693666] [2022-07-13 22:19:25,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:19:25,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:19:25,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:19:25,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:19:25,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:19:25,929 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 211 [2022-07-13 22:19:25,929 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 181 transitions, 408 flow. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:25,929 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:19:25,929 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 211 [2022-07-13 22:19:25,929 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:19:25,970 INFO L129 PetriNetUnfolder]: 58/347 cut-off events. [2022-07-13 22:19:25,971 INFO L130 PetriNetUnfolder]: For 89/97 co-relation queries the response was YES. [2022-07-13 22:19:25,971 INFO L84 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 347 events. 58/347 cut-off events. For 89/97 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 800 event pairs, 9 based on Foata normal form. 2/326 useless extension candidates. Maximal degree in co-relation 567. Up to 91 conditions per place. [2022-07-13 22:19:25,972 INFO L132 encePairwiseOnDemand]: 205/211 looper letters, 18 selfloop transitions, 5 changer transitions 0/185 dead transitions. [2022-07-13 22:19:25,972 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 185 transitions, 468 flow [2022-07-13 22:19:25,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:19:25,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:19:25,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2022-07-13 22:19:25,974 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8846761453396524 [2022-07-13 22:19:25,974 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2022-07-13 22:19:25,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2022-07-13 22:19:25,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:19:25,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2022-07-13 22:19:25,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 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) [2022-07-13 22:19:25,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:25,976 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:25,976 INFO L186 Difference]: Start difference. First operand has 187 places, 181 transitions, 408 flow. Second operand 3 states and 560 transitions. [2022-07-13 22:19:25,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 185 transitions, 468 flow [2022-07-13 22:19:25,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 185 transitions, 460 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-07-13 22:19:25,979 INFO L242 Difference]: Finished difference. Result has 188 places, 183 transitions, 429 flow [2022-07-13 22:19:25,979 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=429, PETRI_PLACES=188, PETRI_TRANSITIONS=183} [2022-07-13 22:19:25,980 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, -1 predicate places. [2022-07-13 22:19:25,980 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 183 transitions, 429 flow [2022-07-13 22:19:25,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:25,980 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:19:25,980 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:19:25,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 22:19:25,981 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:19:25,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:19:25,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1566264516, now seen corresponding path program 3 times [2022-07-13 22:19:25,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:19:25,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860921661] [2022-07-13 22:19:25,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:19:25,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:19:26,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:26,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:19:26,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:19:26,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860921661] [2022-07-13 22:19:26,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860921661] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:19:26,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:19:26,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-13 22:19:26,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748900178] [2022-07-13 22:19:26,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:19:26,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 22:19:26,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:19:26,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 22:19:26,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-07-13 22:19:26,192 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 211 [2022-07-13 22:19:26,193 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 183 transitions, 429 flow. Second operand has 12 states, 12 states have (on average 147.5) internal successors, (1770), 12 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:26,194 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:19:26,194 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 211 [2022-07-13 22:19:26,194 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:19:26,433 INFO L129 PetriNetUnfolder]: 426/1115 cut-off events. [2022-07-13 22:19:26,433 INFO L130 PetriNetUnfolder]: For 592/604 co-relation queries the response was YES. [2022-07-13 22:19:26,436 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2381 conditions, 1115 events. 426/1115 cut-off events. For 592/604 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6108 event pairs, 103 based on Foata normal form. 1/1038 useless extension candidates. Maximal degree in co-relation 2372. Up to 291 conditions per place. [2022-07-13 22:19:26,440 INFO L132 encePairwiseOnDemand]: 196/211 looper letters, 77 selfloop transitions, 13 changer transitions 9/232 dead transitions. [2022-07-13 22:19:26,441 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 232 transitions, 788 flow [2022-07-13 22:19:26,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 22:19:26,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-13 22:19:26,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1969 transitions. [2022-07-13 22:19:26,444 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7178271965001822 [2022-07-13 22:19:26,444 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1969 transitions. [2022-07-13 22:19:26,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1969 transitions. [2022-07-13 22:19:26,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:19:26,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1969 transitions. [2022-07-13 22:19:26,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 151.46153846153845) internal successors, (1969), 13 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:26,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 211.0) internal successors, (2954), 14 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:26,453 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 211.0) internal successors, (2954), 14 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:26,453 INFO L186 Difference]: Start difference. First operand has 188 places, 183 transitions, 429 flow. Second operand 13 states and 1969 transitions. [2022-07-13 22:19:26,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 232 transitions, 788 flow [2022-07-13 22:19:26,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 232 transitions, 763 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-07-13 22:19:26,459 INFO L242 Difference]: Finished difference. Result has 204 places, 189 transitions, 480 flow [2022-07-13 22:19:26,459 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=480, PETRI_PLACES=204, PETRI_TRANSITIONS=189} [2022-07-13 22:19:26,461 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 15 predicate places. [2022-07-13 22:19:26,461 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 189 transitions, 480 flow [2022-07-13 22:19:26,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 147.5) internal successors, (1770), 12 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:26,462 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:19:26,463 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:19:26,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 22:19:26,463 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:19:26,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:19:26,463 INFO L85 PathProgramCache]: Analyzing trace with hash -438702336, now seen corresponding path program 1 times [2022-07-13 22:19:26,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:19:26,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519842985] [2022-07-13 22:19:26,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:19:26,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:19:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:26,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 22:19:26,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:19:26,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519842985] [2022-07-13 22:19:26,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519842985] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:19:26,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:19:26,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 22:19:26,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788134273] [2022-07-13 22:19:26,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:19:26,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 22:19:26,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:19:26,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 22:19:26,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 22:19:26,554 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 211 [2022-07-13 22:19:26,554 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 189 transitions, 480 flow. Second operand has 4 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:26,554 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:19:26,554 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 211 [2022-07-13 22:19:26,555 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:19:26,657 INFO L129 PetriNetUnfolder]: 191/844 cut-off events. [2022-07-13 22:19:26,657 INFO L130 PetriNetUnfolder]: For 355/387 co-relation queries the response was YES. [2022-07-13 22:19:26,660 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1608 conditions, 844 events. 191/844 cut-off events. For 355/387 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4643 event pairs, 41 based on Foata normal form. 20/822 useless extension candidates. Maximal degree in co-relation 1594. Up to 132 conditions per place. [2022-07-13 22:19:26,663 INFO L132 encePairwiseOnDemand]: 208/211 looper letters, 31 selfloop transitions, 6 changer transitions 0/207 dead transitions. [2022-07-13 22:19:26,663 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 207 transitions, 623 flow [2022-07-13 22:19:26,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 22:19:26,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-13 22:19:26,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 761 transitions. [2022-07-13 22:19:26,664 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9016587677725119 [2022-07-13 22:19:26,665 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 761 transitions. [2022-07-13 22:19:26,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 761 transitions. [2022-07-13 22:19:26,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:19:26,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 761 transitions. [2022-07-13 22:19:26,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 190.25) internal successors, (761), 4 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:26,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:26,668 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:26,668 INFO L186 Difference]: Start difference. First operand has 204 places, 189 transitions, 480 flow. Second operand 4 states and 761 transitions. [2022-07-13 22:19:26,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 207 transitions, 623 flow [2022-07-13 22:19:26,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 207 transitions, 601 flow, removed 5 selfloop flow, removed 8 redundant places. [2022-07-13 22:19:26,672 INFO L242 Difference]: Finished difference. Result has 198 places, 193 transitions, 511 flow [2022-07-13 22:19:26,673 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=511, PETRI_PLACES=198, PETRI_TRANSITIONS=193} [2022-07-13 22:19:26,673 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 9 predicate places. [2022-07-13 22:19:26,673 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 193 transitions, 511 flow [2022-07-13 22:19:26,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:26,674 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:19:26,674 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:19:26,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 22:19:26,674 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:19:26,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:19:26,675 INFO L85 PathProgramCache]: Analyzing trace with hash 402399663, now seen corresponding path program 1 times [2022-07-13 22:19:26,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:19:26,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619492104] [2022-07-13 22:19:26,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:19:26,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:19:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:26,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:19:26,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:19:26,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619492104] [2022-07-13 22:19:26,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619492104] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:19:26,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776790897] [2022-07-13 22:19:26,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:19:26,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:19:26,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:19:26,771 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) [2022-07-13 22:19:26,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 22:19:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:26,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 22:19:26,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:19:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:19:27,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:19:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:19:27,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776790897] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:19:27,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:19:27,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-13 22:19:27,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990708821] [2022-07-13 22:19:27,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:19:27,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 22:19:27,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:19:27,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 22:19:27,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:19:27,284 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 211 [2022-07-13 22:19:27,286 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 193 transitions, 511 flow. Second operand has 19 states, 19 states have (on average 159.42105263157896) internal successors, (3029), 19 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:27,286 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:19:27,286 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 211 [2022-07-13 22:19:27,286 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:19:27,683 INFO L129 PetriNetUnfolder]: 288/1435 cut-off events. [2022-07-13 22:19:27,683 INFO L130 PetriNetUnfolder]: For 1329/1413 co-relation queries the response was YES. [2022-07-13 22:19:27,687 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3044 conditions, 1435 events. 288/1435 cut-off events. For 1329/1413 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 9702 event pairs, 149 based on Foata normal form. 64/1434 useless extension candidates. Maximal degree in co-relation 3031. Up to 323 conditions per place. [2022-07-13 22:19:27,691 INFO L132 encePairwiseOnDemand]: 195/211 looper letters, 69 selfloop transitions, 23 changer transitions 1/235 dead transitions. [2022-07-13 22:19:27,691 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 235 transitions, 862 flow [2022-07-13 22:19:27,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 22:19:27,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-13 22:19:27,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2731 transitions. [2022-07-13 22:19:27,695 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7613604683579593 [2022-07-13 22:19:27,695 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2731 transitions. [2022-07-13 22:19:27,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2731 transitions. [2022-07-13 22:19:27,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:19:27,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2731 transitions. [2022-07-13 22:19:27,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 160.64705882352942) internal successors, (2731), 17 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:27,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 211.0) internal successors, (3798), 18 states have internal predecessors, (3798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:27,704 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 211.0) internal successors, (3798), 18 states have internal predecessors, (3798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:27,704 INFO L186 Difference]: Start difference. First operand has 198 places, 193 transitions, 511 flow. Second operand 17 states and 2731 transitions. [2022-07-13 22:19:27,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 235 transitions, 862 flow [2022-07-13 22:19:27,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 235 transitions, 850 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-13 22:19:27,709 INFO L242 Difference]: Finished difference. Result has 220 places, 204 transitions, 618 flow [2022-07-13 22:19:27,709 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=618, PETRI_PLACES=220, PETRI_TRANSITIONS=204} [2022-07-13 22:19:27,710 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 31 predicate places. [2022-07-13 22:19:27,710 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 204 transitions, 618 flow [2022-07-13 22:19:27,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 159.42105263157896) internal successors, (3029), 19 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:27,711 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:19:27,711 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:19:27,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 22:19:27,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:19:27,932 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:19:27,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:19:27,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1732290429, now seen corresponding path program 1 times [2022-07-13 22:19:27,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:19:27,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881313881] [2022-07-13 22:19:27,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:19:27,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:19:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 22:19:28,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:19:28,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881313881] [2022-07-13 22:19:28,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881313881] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:19:28,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925905802] [2022-07-13 22:19:28,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:19:28,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:19:28,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:19:28,024 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) [2022-07-13 22:19:28,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 22:19:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:28,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 22:19:28,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:19:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 22:19:28,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:19:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 22:19:28,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925905802] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:19:28,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:19:28,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-13 22:19:28,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377694968] [2022-07-13 22:19:28,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:19:28,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 22:19:28,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:19:28,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 22:19:28,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:19:28,541 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 211 [2022-07-13 22:19:28,543 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 204 transitions, 618 flow. Second operand has 19 states, 19 states have (on average 159.57894736842104) internal successors, (3032), 19 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:28,544 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:19:28,544 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 211 [2022-07-13 22:19:28,544 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:19:28,939 INFO L129 PetriNetUnfolder]: 329/1728 cut-off events. [2022-07-13 22:19:28,940 INFO L130 PetriNetUnfolder]: For 1391/1456 co-relation queries the response was YES. [2022-07-13 22:19:28,944 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3623 conditions, 1728 events. 329/1728 cut-off events. For 1391/1456 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 12448 event pairs, 183 based on Foata normal form. 37/1680 useless extension candidates. Maximal degree in co-relation 3603. Up to 439 conditions per place. [2022-07-13 22:19:28,948 INFO L132 encePairwiseOnDemand]: 198/211 looper letters, 68 selfloop transitions, 23 changer transitions 2/235 dead transitions. [2022-07-13 22:19:28,948 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 235 transitions, 941 flow [2022-07-13 22:19:28,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 22:19:28,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-13 22:19:28,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2096 transitions. [2022-07-13 22:19:28,951 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7641268683922713 [2022-07-13 22:19:28,951 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2096 transitions. [2022-07-13 22:19:28,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2096 transitions. [2022-07-13 22:19:28,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:19:28,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2096 transitions. [2022-07-13 22:19:28,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 161.23076923076923) internal successors, (2096), 13 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:28,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 211.0) internal successors, (2954), 14 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:28,960 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 211.0) internal successors, (2954), 14 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:28,960 INFO L186 Difference]: Start difference. First operand has 220 places, 204 transitions, 618 flow. Second operand 13 states and 2096 transitions. [2022-07-13 22:19:28,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 235 transitions, 941 flow [2022-07-13 22:19:28,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 235 transitions, 915 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-07-13 22:19:28,965 INFO L242 Difference]: Finished difference. Result has 234 places, 212 transitions, 721 flow [2022-07-13 22:19:28,966 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=721, PETRI_PLACES=234, PETRI_TRANSITIONS=212} [2022-07-13 22:19:28,966 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 45 predicate places. [2022-07-13 22:19:28,966 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 212 transitions, 721 flow [2022-07-13 22:19:28,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 159.57894736842104) internal successors, (3032), 19 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:28,967 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:19:28,968 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:19:28,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 22:19:29,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-13 22:19:29,203 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:19:29,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:19:29,203 INFO L85 PathProgramCache]: Analyzing trace with hash 567606463, now seen corresponding path program 2 times [2022-07-13 22:19:29,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:19:29,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231282667] [2022-07-13 22:19:29,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:19:29,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:19:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:29,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:19:29,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:19:29,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231282667] [2022-07-13 22:19:29,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231282667] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:19:29,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114453549] [2022-07-13 22:19:29,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:19:29,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:19:29,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:19:29,785 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) [2022-07-13 22:19:29,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 22:19:29,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:19:29,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:19:29,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-13 22:19:29,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:19:30,581 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 22:19:30,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-07-13 22:19:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:19:30,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:19:30,771 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-13 22:19:30,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-07-13 22:19:31,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:19:31,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114453549] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:19:31,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:19:31,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 14] total 45 [2022-07-13 22:19:31,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660676211] [2022-07-13 22:19:31,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:19:31,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-13 22:19:31,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:19:31,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-13 22:19:31,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2022-07-13 22:19:31,681 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 211 [2022-07-13 22:19:31,684 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 212 transitions, 721 flow. Second operand has 45 states, 45 states have (on average 107.35555555555555) internal successors, (4831), 45 states have internal predecessors, (4831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:31,684 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:19:31,684 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 211 [2022-07-13 22:19:31,685 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:19:37,144 INFO L129 PetriNetUnfolder]: 8052/21529 cut-off events. [2022-07-13 22:19:37,145 INFO L130 PetriNetUnfolder]: For 21806/22617 co-relation queries the response was YES. [2022-07-13 22:19:37,241 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49595 conditions, 21529 events. 8052/21529 cut-off events. For 21806/22617 co-relation queries the response was YES. Maximal size of possible extension queue 817. Compared 236431 event pairs, 1892 based on Foata normal form. 103/20732 useless extension candidates. Maximal degree in co-relation 49569. Up to 3824 conditions per place. [2022-07-13 22:19:37,317 INFO L132 encePairwiseOnDemand]: 172/211 looper letters, 383 selfloop transitions, 195 changer transitions 7/679 dead transitions. [2022-07-13 22:19:37,317 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 679 transitions, 3911 flow [2022-07-13 22:19:37,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-13 22:19:37,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-07-13 22:19:37,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 7027 transitions. [2022-07-13 22:19:37,329 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.520364336492891 [2022-07-13 22:19:37,329 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 7027 transitions. [2022-07-13 22:19:37,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 7027 transitions. [2022-07-13 22:19:37,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:19:37,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 7027 transitions. [2022-07-13 22:19:37,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 109.796875) internal successors, (7027), 64 states have internal predecessors, (7027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:37,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 211.0) internal successors, (13715), 65 states have internal predecessors, (13715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:37,438 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 211.0) internal successors, (13715), 65 states have internal predecessors, (13715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:37,438 INFO L186 Difference]: Start difference. First operand has 234 places, 212 transitions, 721 flow. Second operand 64 states and 7027 transitions. [2022-07-13 22:19:37,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 679 transitions, 3911 flow [2022-07-13 22:19:37,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 679 transitions, 3862 flow, removed 8 selfloop flow, removed 5 redundant places. [2022-07-13 22:19:37,461 INFO L242 Difference]: Finished difference. Result has 317 places, 417 transitions, 2441 flow [2022-07-13 22:19:37,462 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=689, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=2441, PETRI_PLACES=317, PETRI_TRANSITIONS=417} [2022-07-13 22:19:37,463 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 128 predicate places. [2022-07-13 22:19:37,463 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 417 transitions, 2441 flow [2022-07-13 22:19:37,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 107.35555555555555) internal successors, (4831), 45 states have internal predecessors, (4831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:37,464 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:19:37,464 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:19:37,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 22:19:37,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:19:37,699 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:19:37,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:19:37,700 INFO L85 PathProgramCache]: Analyzing trace with hash -832418055, now seen corresponding path program 3 times [2022-07-13 22:19:37,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:19:37,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130066811] [2022-07-13 22:19:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:19:37,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:19:37,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:38,347 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:19:38,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:19:38,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130066811] [2022-07-13 22:19:38,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130066811] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:19:38,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061751483] [2022-07-13 22:19:38,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:19:38,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:19:38,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:19:38,352 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) [2022-07-13 22:19:38,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 22:19:38,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-13 22:19:38,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:19:38,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 22:19:38,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:19:38,830 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 22:19:38,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-07-13 22:19:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 22:19:38,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:19:38,898 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-13 22:19:38,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-07-13 22:19:39,250 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 22:19:39,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061751483] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:19:39,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:19:39,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 5, 5] total 25 [2022-07-13 22:19:39,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846764908] [2022-07-13 22:19:39,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:19:39,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-13 22:19:39,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:19:39,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-13 22:19:39,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2022-07-13 22:19:39,253 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 211 [2022-07-13 22:19:39,255 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 417 transitions, 2441 flow. Second operand has 25 states, 25 states have (on average 108.72) internal successors, (2718), 25 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:39,255 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:19:39,255 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 211 [2022-07-13 22:19:39,255 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:19:45,079 INFO L129 PetriNetUnfolder]: 9108/24396 cut-off events. [2022-07-13 22:19:45,080 INFO L130 PetriNetUnfolder]: For 198224/202550 co-relation queries the response was YES. [2022-07-13 22:19:45,213 INFO L84 FinitePrefix]: Finished finitePrefix Result has 105175 conditions, 24396 events. 9108/24396 cut-off events. For 198224/202550 co-relation queries the response was YES. Maximal size of possible extension queue 955. Compared 276015 event pairs, 3263 based on Foata normal form. 421/24370 useless extension candidates. Maximal degree in co-relation 105124. Up to 10411 conditions per place. [2022-07-13 22:19:45,330 INFO L132 encePairwiseOnDemand]: 180/211 looper letters, 353 selfloop transitions, 102 changer transitions 0/549 dead transitions. [2022-07-13 22:19:45,330 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 549 transitions, 4423 flow [2022-07-13 22:19:45,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-13 22:19:45,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-13 22:19:45,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4191 transitions. [2022-07-13 22:19:45,334 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5092963908129785 [2022-07-13 22:19:45,334 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4191 transitions. [2022-07-13 22:19:45,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4191 transitions. [2022-07-13 22:19:45,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:19:45,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4191 transitions. [2022-07-13 22:19:45,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 107.46153846153847) internal successors, (4191), 39 states have internal predecessors, (4191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:45,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 211.0) internal successors, (8440), 40 states have internal predecessors, (8440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:45,348 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 211.0) internal successors, (8440), 40 states have internal predecessors, (8440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:45,348 INFO L186 Difference]: Start difference. First operand has 317 places, 417 transitions, 2441 flow. Second operand 39 states and 4191 transitions. [2022-07-13 22:19:45,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 549 transitions, 4423 flow [2022-07-13 22:19:45,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 549 transitions, 4188 flow, removed 96 selfloop flow, removed 16 redundant places. [2022-07-13 22:19:45,521 INFO L242 Difference]: Finished difference. Result has 344 places, 451 transitions, 2864 flow [2022-07-13 22:19:45,521 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=2256, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2864, PETRI_PLACES=344, PETRI_TRANSITIONS=451} [2022-07-13 22:19:45,522 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 155 predicate places. [2022-07-13 22:19:45,522 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 451 transitions, 2864 flow [2022-07-13 22:19:45,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 108.72) internal successors, (2718), 25 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:45,523 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:19:45,523 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:19:45,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 22:19:45,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:19:45,741 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:19:45,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:19:45,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1280105239, now seen corresponding path program 4 times [2022-07-13 22:19:45,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:19:45,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723607679] [2022-07-13 22:19:45,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:19:45,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:19:45,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:19:46,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:19:46,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723607679] [2022-07-13 22:19:46,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723607679] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:19:46,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500651569] [2022-07-13 22:19:46,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:19:46,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:19:46,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:19:46,282 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) [2022-07-13 22:19:46,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 22:19:46,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:19:46,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:19:46,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-13 22:19:46,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:19:46,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:19:46,554 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 22:19:46,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-13 22:19:47,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-13 22:19:47,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-13 22:19:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:19:47,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:19:47,489 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:19:47,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-07-13 22:19:47,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-07-13 22:19:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:19:48,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500651569] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:19:48,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:19:48,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 59 [2022-07-13 22:19:48,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12503375] [2022-07-13 22:19:48,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:19:48,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-13 22:19:48,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:19:48,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-13 22:19:48,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=3138, Unknown=0, NotChecked=0, Total=3422 [2022-07-13 22:19:48,804 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 211 [2022-07-13 22:19:48,808 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 451 transitions, 2864 flow. Second operand has 59 states, 59 states have (on average 120.30508474576271) internal successors, (7098), 59 states have internal predecessors, (7098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:48,808 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:19:48,808 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 211 [2022-07-13 22:19:48,809 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:20:04,936 INFO L129 PetriNetUnfolder]: 26171/68391 cut-off events. [2022-07-13 22:20:04,936 INFO L130 PetriNetUnfolder]: For 655427/667017 co-relation queries the response was YES. [2022-07-13 22:20:06,012 INFO L84 FinitePrefix]: Finished finitePrefix Result has 296482 conditions, 68391 events. 26171/68391 cut-off events. For 655427/667017 co-relation queries the response was YES. Maximal size of possible extension queue 2595. Compared 891302 event pairs, 2662 based on Foata normal form. 2294/69718 useless extension candidates. Maximal degree in co-relation 296426. Up to 11708 conditions per place. [2022-07-13 22:20:06,278 INFO L132 encePairwiseOnDemand]: 179/211 looper letters, 896 selfloop transitions, 421 changer transitions 23/1447 dead transitions. [2022-07-13 22:20:06,279 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 1447 transitions, 14467 flow [2022-07-13 22:20:06,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-13 22:20:06,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-07-13 22:20:06,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 8097 transitions. [2022-07-13 22:20:06,286 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.581430417923309 [2022-07-13 22:20:06,286 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 8097 transitions. [2022-07-13 22:20:06,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 8097 transitions. [2022-07-13 22:20:06,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:20:06,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 8097 transitions. [2022-07-13 22:20:06,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 122.68181818181819) internal successors, (8097), 66 states have internal predecessors, (8097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:06,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 211.0) internal successors, (14137), 67 states have internal predecessors, (14137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:06,308 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 211.0) internal successors, (14137), 67 states have internal predecessors, (14137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:06,308 INFO L186 Difference]: Start difference. First operand has 344 places, 451 transitions, 2864 flow. Second operand 66 states and 8097 transitions. [2022-07-13 22:20:06,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 1447 transitions, 14467 flow [2022-07-13 22:20:07,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1447 transitions, 14265 flow, removed 64 selfloop flow, removed 32 redundant places. [2022-07-13 22:20:07,022 INFO L242 Difference]: Finished difference. Result has 393 places, 832 transitions, 6953 flow [2022-07-13 22:20:07,023 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=2700, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=6953, PETRI_PLACES=393, PETRI_TRANSITIONS=832} [2022-07-13 22:20:07,023 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 204 predicate places. [2022-07-13 22:20:07,023 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 832 transitions, 6953 flow [2022-07-13 22:20:07,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 120.30508474576271) internal successors, (7098), 59 states have internal predecessors, (7098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:07,024 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:20:07,025 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:20:07,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 22:20:07,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-13 22:20:07,242 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:20:07,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:20:07,243 INFO L85 PathProgramCache]: Analyzing trace with hash -111131311, now seen corresponding path program 5 times [2022-07-13 22:20:07,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:20:07,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070507013] [2022-07-13 22:20:07,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:20:07,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:20:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:20:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:09,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:20:09,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070507013] [2022-07-13 22:20:09,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070507013] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:20:09,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883827661] [2022-07-13 22:20:09,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 22:20:09,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:20:09,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:20:09,725 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) [2022-07-13 22:20:09,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 22:20:09,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-13 22:20:09,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:20:09,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-13 22:20:09,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:20:09,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:20:09,885 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-13 22:20:09,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-13 22:20:10,074 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-07-13 22:20:10,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2022-07-13 22:20:10,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-13 22:20:10,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-13 22:20:10,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-13 22:20:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 22:20:10,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 22:20:10,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883827661] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:20:10,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 22:20:10,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [39] total 51 [2022-07-13 22:20:10,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770511051] [2022-07-13 22:20:10,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:20:10,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 22:20:10,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:20:10,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 22:20:10,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2416, Unknown=0, NotChecked=0, Total=2550 [2022-07-13 22:20:10,748 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 211 [2022-07-13 22:20:10,749 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 832 transitions, 6953 flow. Second operand has 14 states, 14 states have (on average 142.71428571428572) internal successors, (1998), 14 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:10,749 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:20:10,749 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 211 [2022-07-13 22:20:10,749 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:20:24,945 INFO L129 PetriNetUnfolder]: 25646/67547 cut-off events. [2022-07-13 22:20:24,945 INFO L130 PetriNetUnfolder]: For 874186/890206 co-relation queries the response was YES. [2022-07-13 22:20:25,999 INFO L84 FinitePrefix]: Finished finitePrefix Result has 330911 conditions, 67547 events. 25646/67547 cut-off events. For 874186/890206 co-relation queries the response was YES. Maximal size of possible extension queue 2529. Compared 884079 event pairs, 7506 based on Foata normal form. 1496/67442 useless extension candidates. Maximal degree in co-relation 330839. Up to 19140 conditions per place. [2022-07-13 22:20:26,264 INFO L132 encePairwiseOnDemand]: 191/211 looper letters, 743 selfloop transitions, 178 changer transitions 9/1089 dead transitions. [2022-07-13 22:20:26,264 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 1089 transitions, 11506 flow [2022-07-13 22:20:26,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 22:20:26,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-13 22:20:26,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2587 transitions. [2022-07-13 22:20:26,267 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.681147972617167 [2022-07-13 22:20:26,267 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2587 transitions. [2022-07-13 22:20:26,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2587 transitions. [2022-07-13 22:20:26,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:20:26,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2587 transitions. [2022-07-13 22:20:26,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 143.72222222222223) internal successors, (2587), 18 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:26,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 211.0) internal successors, (4009), 19 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:26,272 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 211.0) internal successors, (4009), 19 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:26,272 INFO L186 Difference]: Start difference. First operand has 393 places, 832 transitions, 6953 flow. Second operand 18 states and 2587 transitions. [2022-07-13 22:20:26,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 1089 transitions, 11506 flow [2022-07-13 22:20:29,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 1089 transitions, 11315 flow, removed 46 selfloop flow, removed 37 redundant places. [2022-07-13 22:20:29,300 INFO L242 Difference]: Finished difference. Result has 375 places, 866 transitions, 7789 flow [2022-07-13 22:20:29,301 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=6776, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7789, PETRI_PLACES=375, PETRI_TRANSITIONS=866} [2022-07-13 22:20:29,301 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 186 predicate places. [2022-07-13 22:20:29,302 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 866 transitions, 7789 flow [2022-07-13 22:20:29,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 142.71428571428572) internal successors, (1998), 14 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:29,302 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:20:29,302 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:20:29,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 22:20:29,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:20:29,519 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:20:29,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:20:29,520 INFO L85 PathProgramCache]: Analyzing trace with hash 365401974, now seen corresponding path program 2 times [2022-07-13 22:20:29,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:20:29,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17315955] [2022-07-13 22:20:29,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:20:29,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:20:29,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:20:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-13 22:20:29,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:20:29,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17315955] [2022-07-13 22:20:29,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17315955] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:20:29,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:20:29,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 22:20:29,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166135649] [2022-07-13 22:20:29,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:20:29,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 22:20:29,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:20:29,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 22:20:29,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 22:20:29,651 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 211 [2022-07-13 22:20:29,652 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 866 transitions, 7789 flow. Second operand has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:29,652 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:20:29,652 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 211 [2022-07-13 22:20:29,652 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand