./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-more-queue-add-2-nl.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 c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:53:40,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:53:40,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:53:40,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:53:40,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:53:40,539 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:53:40,540 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:53:40,542 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:53:40,543 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:53:40,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:53:40,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:53:40,545 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:53:40,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:53:40,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:53:40,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:53:40,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:53:40,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:53:40,550 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:53:40,551 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:53:40,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:53:40,557 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:53:40,560 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:53:40,561 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:53:40,562 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:53:40,566 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:53:40,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:53:40,575 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:53:40,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:53:40,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:53:40,577 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:53:40,578 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:53:40,578 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:53:40,580 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:53:40,581 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:53:40,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:53:40,582 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:53:40,582 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:53:40,583 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:53:40,583 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:53:40,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:53:40,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:53:40,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:53:40,588 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:53:40,616 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:53:40,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:53:40,617 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:53:40,617 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:53:40,619 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:53:40,619 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:53:40,620 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:53:40,620 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:53:40,620 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:53:40,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:53:40,621 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:53:40,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:53:40,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:53:40,622 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:53:40,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:53:40,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:53:40,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:53:40,622 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:53:40,623 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:53:40,624 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:53:40,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:53:40,624 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:53:40,624 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:53:40,625 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:53:40,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:53:40,625 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:53:40,625 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:53:40,625 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:53:40,626 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:53:40,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:53:40,626 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:53:40,626 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:53:40,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:53:40,627 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 [2022-07-22 21:53:40,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:53:40,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:53:40,876 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:53:40,877 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:53:40,878 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:53:40,879 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2022-07-22 21:53:40,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ad1c2b22/98be5ef4782c40ce9c484d7200fdb0fe/FLAG9e93c4b96 [2022-07-22 21:53:41,397 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:53:41,397 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2022-07-22 21:53:41,406 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ad1c2b22/98be5ef4782c40ce9c484d7200fdb0fe/FLAG9e93c4b96 [2022-07-22 21:53:41,425 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ad1c2b22/98be5ef4782c40ce9c484d7200fdb0fe [2022-07-22 21:53:41,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:53:41,429 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:53:41,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:53:41,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:53:41,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:53:41,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:53:41" (1/1) ... [2022-07-22 21:53:41,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9d2f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:53:41, skipping insertion in model container [2022-07-22 21:53:41,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:53:41" (1/1) ... [2022-07-22 21:53:41,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:53:41,463 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:53:41,651 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-more-queue-add-2-nl.wvr.c[2870,2883] [2022-07-22 21:53:41,672 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:53:41,683 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:53:41,722 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-more-queue-add-2-nl.wvr.c[2870,2883] [2022-07-22 21:53:41,728 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:53:41,746 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:53:41,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:53:41 WrapperNode [2022-07-22 21:53:41,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:53:41,748 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:53:41,749 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:53:41,749 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:53:41,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:53:41" (1/1) ... [2022-07-22 21:53:41,771 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:53:41" (1/1) ... [2022-07-22 21:53:41,801 INFO L137 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 163 [2022-07-22 21:53:41,801 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:53:41,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:53:41,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:53:41,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:53:41,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:53:41" (1/1) ... [2022-07-22 21:53:41,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:53:41" (1/1) ... [2022-07-22 21:53:41,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:53:41" (1/1) ... [2022-07-22 21:53:41,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:53:41" (1/1) ... [2022-07-22 21:53:41,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:53:41" (1/1) ... [2022-07-22 21:53:41,834 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:53:41" (1/1) ... [2022-07-22 21:53:41,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:53:41" (1/1) ... [2022-07-22 21:53:41,837 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:53:41,838 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:53:41,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:53:41,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:53:41,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:53:41" (1/1) ... [2022-07-22 21:53:41,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:53:41,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:53:41,865 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) [2022-07-22 21:53:41,867 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 [2022-07-22 21:53:41,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:53:41,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:53:41,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:53:41,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:53:41,906 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:53:41,907 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:53:41,907 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:53:41,907 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:53:41,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:53:41,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:53:41,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:53:41,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 21:53:41,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:53:41,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:53:41,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:53:41,909 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:53:42,035 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:53:42,036 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:53:42,346 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:53:42,452 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:53:42,458 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 21:53:42,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:53:42 BoogieIcfgContainer [2022-07-22 21:53:42,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:53:42,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:53:42,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:53:42,466 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:53:42,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:53:41" (1/3) ... [2022-07-22 21:53:42,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dab31e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:53:42, skipping insertion in model container [2022-07-22 21:53:42,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:53:41" (2/3) ... [2022-07-22 21:53:42,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dab31e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:53:42, skipping insertion in model container [2022-07-22 21:53:42,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:53:42" (3/3) ... [2022-07-22 21:53:42,469 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2022-07-22 21:53:42,476 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:53:42,484 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:53:42,485 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:53:42,485 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:53:42,569 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:53:42,612 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 141 places, 145 transitions, 306 flow [2022-07-22 21:53:42,694 INFO L129 PetriNetUnfolder]: 11/143 cut-off events. [2022-07-22 21:53:42,695 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:53:42,698 INFO L84 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 143 events. 11/143 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 78 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 106. Up to 3 conditions per place. [2022-07-22 21:53:42,698 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 145 transitions, 306 flow [2022-07-22 21:53:42,706 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 134 transitions, 280 flow [2022-07-22 21:53:42,720 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:53:42,727 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@5b451e26, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@384db8a1 [2022-07-22 21:53:42,727 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-22 21:53:42,767 INFO L129 PetriNetUnfolder]: 11/133 cut-off events. [2022-07-22 21:53:42,769 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:53:42,770 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:53:42,770 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] [2022-07-22 21:53:42,771 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:53:42,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:53:42,775 INFO L85 PathProgramCache]: Analyzing trace with hash 956022790, now seen corresponding path program 1 times [2022-07-22 21:53:42,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:53:42,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375153730] [2022-07-22 21:53:42,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:42,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:53:42,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:43,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:43,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:53:43,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375153730] [2022-07-22 21:53:43,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375153730] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:53:43,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:53:43,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:53:43,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35291189] [2022-07-22 21:53:43,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:53:43,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:53:43,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:53:43,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:53:43,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:53:43,047 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 145 [2022-07-22 21:53:43,054 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 134 transitions, 280 flow. Second operand has 2 states, 2 states have (on average 132.5) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:43,054 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:53:43,054 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 145 [2022-07-22 21:53:43,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:53:43,116 INFO L129 PetriNetUnfolder]: 12/160 cut-off events. [2022-07-22 21:53:43,116 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-07-22 21:53:43,118 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 160 events. 12/160 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 195 event pairs, 5 based on Foata normal form. 14/161 useless extension candidates. Maximal degree in co-relation 104. Up to 22 conditions per place. [2022-07-22 21:53:43,120 INFO L132 encePairwiseOnDemand]: 137/145 looper letters, 7 selfloop transitions, 0 changer transitions 4/126 dead transitions. [2022-07-22 21:53:43,121 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 126 transitions, 278 flow [2022-07-22 21:53:43,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:53:43,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:53:43,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 273 transitions. [2022-07-22 21:53:43,137 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9413793103448276 [2022-07-22 21:53:43,138 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 273 transitions. [2022-07-22 21:53:43,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 273 transitions. [2022-07-22 21:53:43,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:53:43,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 273 transitions. [2022-07-22 21:53:43,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 136.5) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:43,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:43,167 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:43,169 INFO L186 Difference]: Start difference. First operand has 130 places, 134 transitions, 280 flow. Second operand 2 states and 273 transitions. [2022-07-22 21:53:43,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 126 transitions, 278 flow [2022-07-22 21:53:43,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 126 transitions, 270 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:53:43,175 INFO L242 Difference]: Finished difference. Result has 127 places, 122 transitions, 248 flow [2022-07-22 21:53:43,177 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=248, PETRI_PLACES=127, PETRI_TRANSITIONS=122} [2022-07-22 21:53:43,182 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, -3 predicate places. [2022-07-22 21:53:43,183 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 122 transitions, 248 flow [2022-07-22 21:53:43,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 132.5) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:43,184 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:53:43,184 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] [2022-07-22 21:53:43,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:53:43,185 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:53:43,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:53:43,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1538584147, now seen corresponding path program 1 times [2022-07-22 21:53:43,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:53:43,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844959172] [2022-07-22 21:53:43,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:43,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:53:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:43,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:43,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:53:43,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844959172] [2022-07-22 21:53:43,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844959172] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:53:43,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:53:43,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:53:43,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181165769] [2022-07-22 21:53:43,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:53:43,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:53:43,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:53:43,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:53:43,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:53:43,446 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 145 [2022-07-22 21:53:43,447 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 122 transitions, 248 flow. Second operand has 6 states, 6 states have (on average 117.66666666666667) internal successors, (706), 6 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:43,447 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:53:43,451 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 145 [2022-07-22 21:53:43,451 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:53:43,582 INFO L129 PetriNetUnfolder]: 12/193 cut-off events. [2022-07-22 21:53:43,583 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:53:43,584 INFO L84 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 193 events. 12/193 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 277 event pairs, 5 based on Foata normal form. 5/187 useless extension candidates. Maximal degree in co-relation 241. Up to 31 conditions per place. [2022-07-22 21:53:43,585 INFO L132 encePairwiseOnDemand]: 135/145 looper letters, 19 selfloop transitions, 6 changer transitions 3/129 dead transitions. [2022-07-22 21:53:43,585 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 129 transitions, 320 flow [2022-07-22 21:53:43,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:53:43,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:53:43,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 836 transitions. [2022-07-22 21:53:43,588 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8236453201970443 [2022-07-22 21:53:43,589 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 836 transitions. [2022-07-22 21:53:43,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 836 transitions. [2022-07-22 21:53:43,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:53:43,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 836 transitions. [2022-07-22 21:53:43,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 119.42857142857143) internal successors, (836), 7 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:43,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 145.0) internal successors, (1160), 8 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:43,597 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 145.0) internal successors, (1160), 8 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:43,597 INFO L186 Difference]: Start difference. First operand has 127 places, 122 transitions, 248 flow. Second operand 7 states and 836 transitions. [2022-07-22 21:53:43,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 129 transitions, 320 flow [2022-07-22 21:53:43,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 129 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:53:43,602 INFO L242 Difference]: Finished difference. Result has 131 places, 123 transitions, 274 flow [2022-07-22 21:53:43,603 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=274, PETRI_PLACES=131, PETRI_TRANSITIONS=123} [2022-07-22 21:53:43,604 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 1 predicate places. [2022-07-22 21:53:43,604 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 123 transitions, 274 flow [2022-07-22 21:53:43,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 117.66666666666667) internal successors, (706), 6 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:43,605 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:53:43,605 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] [2022-07-22 21:53:43,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:53:43,606 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:53:43,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:53:43,606 INFO L85 PathProgramCache]: Analyzing trace with hash 635041614, now seen corresponding path program 1 times [2022-07-22 21:53:43,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:53:43,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013167476] [2022-07-22 21:53:43,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:43,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:53:43,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:53:43,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:53:43,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013167476] [2022-07-22 21:53:43,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013167476] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:53:43,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:53:43,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:53:43,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455979034] [2022-07-22 21:53:43,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:53:43,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:53:43,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:53:43,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:53:43,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:53:43,763 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 145 [2022-07-22 21:53:43,763 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 123 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:43,764 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:53:43,764 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 145 [2022-07-22 21:53:43,764 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:53:43,799 INFO L129 PetriNetUnfolder]: 12/163 cut-off events. [2022-07-22 21:53:43,799 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-22 21:53:43,800 INFO L84 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 163 events. 12/163 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 180 event pairs, 1 based on Foata normal form. 1/159 useless extension candidates. Maximal degree in co-relation 213. Up to 22 conditions per place. [2022-07-22 21:53:43,801 INFO L132 encePairwiseOnDemand]: 141/145 looper letters, 11 selfloop transitions, 3 changer transitions 0/126 dead transitions. [2022-07-22 21:53:43,801 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 126 transitions, 313 flow [2022-07-22 21:53:43,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:53:43,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:53:43,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2022-07-22 21:53:43,802 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.896551724137931 [2022-07-22 21:53:43,803 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2022-07-22 21:53:43,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2022-07-22 21:53:43,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:53:43,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2022-07-22 21:53:43,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:43,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:43,806 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:43,806 INFO L186 Difference]: Start difference. First operand has 131 places, 123 transitions, 274 flow. Second operand 3 states and 390 transitions. [2022-07-22 21:53:43,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 126 transitions, 313 flow [2022-07-22 21:53:43,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 126 transitions, 303 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:53:43,809 INFO L242 Difference]: Finished difference. Result has 129 places, 125 transitions, 287 flow [2022-07-22 21:53:43,810 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=287, PETRI_PLACES=129, PETRI_TRANSITIONS=125} [2022-07-22 21:53:43,810 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, -1 predicate places. [2022-07-22 21:53:43,811 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 125 transitions, 287 flow [2022-07-22 21:53:43,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:43,811 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:53:43,811 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] [2022-07-22 21:53:43,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:53:43,812 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:53:43,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:53:43,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1090197722, now seen corresponding path program 2 times [2022-07-22 21:53:43,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:53:43,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187763499] [2022-07-22 21:53:43,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:43,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:53:43,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:44,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:53:44,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:53:44,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187763499] [2022-07-22 21:53:44,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187763499] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:53:44,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:53:44,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-22 21:53:44,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104516584] [2022-07-22 21:53:44,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:53:44,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 21:53:44,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:53:44,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 21:53:44,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-07-22 21:53:44,399 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-22 21:53:44,401 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 125 transitions, 287 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:44,401 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:53:44,402 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-22 21:53:44,402 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:53:44,834 INFO L129 PetriNetUnfolder]: 120/413 cut-off events. [2022-07-22 21:53:44,835 INFO L130 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2022-07-22 21:53:44,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 413 events. 120/413 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1605 event pairs, 19 based on Foata normal form. 1/383 useless extension candidates. Maximal degree in co-relation 800. Up to 174 conditions per place. [2022-07-22 21:53:44,838 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 64 selfloop transitions, 21 changer transitions 6/171 dead transitions. [2022-07-22 21:53:44,838 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 171 transitions, 598 flow [2022-07-22 21:53:44,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 21:53:44,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-22 21:53:44,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1605 transitions. [2022-07-22 21:53:44,842 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6511156186612576 [2022-07-22 21:53:44,842 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1605 transitions. [2022-07-22 21:53:44,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1605 transitions. [2022-07-22 21:53:44,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:53:44,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1605 transitions. [2022-07-22 21:53:44,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 94.41176470588235) internal successors, (1605), 17 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:44,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:44,852 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:44,852 INFO L186 Difference]: Start difference. First operand has 129 places, 125 transitions, 287 flow. Second operand 17 states and 1605 transitions. [2022-07-22 21:53:44,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 171 transitions, 598 flow [2022-07-22 21:53:44,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 171 transitions, 570 flow, removed 12 selfloop flow, removed 2 redundant places. [2022-07-22 21:53:44,858 INFO L242 Difference]: Finished difference. Result has 151 places, 141 transitions, 391 flow [2022-07-22 21:53:44,858 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=391, PETRI_PLACES=151, PETRI_TRANSITIONS=141} [2022-07-22 21:53:44,859 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 21 predicate places. [2022-07-22 21:53:44,859 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 141 transitions, 391 flow [2022-07-22 21:53:44,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:44,860 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:53:44,860 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] [2022-07-22 21:53:44,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:53:44,861 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:53:44,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:53:44,861 INFO L85 PathProgramCache]: Analyzing trace with hash -190163016, now seen corresponding path program 3 times [2022-07-22 21:53:44,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:53:44,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416606894] [2022-07-22 21:53:44,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:44,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:53:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:53:45,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:53:45,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416606894] [2022-07-22 21:53:45,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416606894] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:53:45,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:53:45,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-22 21:53:45,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261507550] [2022-07-22 21:53:45,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:53:45,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 21:53:45,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:53:45,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 21:53:45,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-22 21:53:45,373 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-22 21:53:45,374 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 141 transitions, 391 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:45,374 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:53:45,375 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-22 21:53:45,375 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:53:45,843 INFO L129 PetriNetUnfolder]: 130/473 cut-off events. [2022-07-22 21:53:45,844 INFO L130 PetriNetUnfolder]: For 203/203 co-relation queries the response was YES. [2022-07-22 21:53:45,845 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1065 conditions, 473 events. 130/473 cut-off events. For 203/203 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2193 event pairs, 18 based on Foata normal form. 1/471 useless extension candidates. Maximal degree in co-relation 1051. Up to 172 conditions per place. [2022-07-22 21:53:45,849 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 69 selfloop transitions, 26 changer transitions 6/181 dead transitions. [2022-07-22 21:53:45,850 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 181 transitions, 751 flow [2022-07-22 21:53:45,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 21:53:45,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-22 21:53:45,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1701 transitions. [2022-07-22 21:53:45,872 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6517241379310345 [2022-07-22 21:53:45,872 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1701 transitions. [2022-07-22 21:53:45,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1701 transitions. [2022-07-22 21:53:45,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:53:45,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1701 transitions. [2022-07-22 21:53:45,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 94.5) internal successors, (1701), 18 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:45,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 145.0) internal successors, (2755), 19 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:45,882 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 145.0) internal successors, (2755), 19 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:45,882 INFO L186 Difference]: Start difference. First operand has 151 places, 141 transitions, 391 flow. Second operand 18 states and 1701 transitions. [2022-07-22 21:53:45,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 181 transitions, 751 flow [2022-07-22 21:53:45,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 181 transitions, 731 flow, removed 6 selfloop flow, removed 7 redundant places. [2022-07-22 21:53:45,888 INFO L242 Difference]: Finished difference. Result has 164 places, 146 transitions, 478 flow [2022-07-22 21:53:45,888 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=478, PETRI_PLACES=164, PETRI_TRANSITIONS=146} [2022-07-22 21:53:45,889 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 34 predicate places. [2022-07-22 21:53:45,889 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 146 transitions, 478 flow [2022-07-22 21:53:45,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:45,890 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:53:45,890 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] [2022-07-22 21:53:45,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:53:45,890 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:53:45,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:53:45,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1275484174, now seen corresponding path program 4 times [2022-07-22 21:53:45,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:53:45,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489579760] [2022-07-22 21:53:45,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:45,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:53:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:53:46,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:53:46,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489579760] [2022-07-22 21:53:46,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489579760] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:53:46,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:53:46,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-22 21:53:46,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587101512] [2022-07-22 21:53:46,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:53:46,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 21:53:46,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:53:46,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 21:53:46,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-07-22 21:53:46,257 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-22 21:53:46,259 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 146 transitions, 478 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:46,259 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:53:46,259 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-22 21:53:46,259 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:53:46,732 INFO L129 PetriNetUnfolder]: 141/517 cut-off events. [2022-07-22 21:53:46,732 INFO L130 PetriNetUnfolder]: For 513/513 co-relation queries the response was YES. [2022-07-22 21:53:46,734 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1337 conditions, 517 events. 141/517 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2510 event pairs, 46 based on Foata normal form. 1/511 useless extension candidates. Maximal degree in co-relation 1319. Up to 229 conditions per place. [2022-07-22 21:53:46,737 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 70 selfloop transitions, 29 changer transitions 6/185 dead transitions. [2022-07-22 21:53:46,737 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 185 transitions, 897 flow [2022-07-22 21:53:46,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 21:53:46,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-22 21:53:46,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1517 transitions. [2022-07-22 21:53:46,741 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6538793103448276 [2022-07-22 21:53:46,741 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1517 transitions. [2022-07-22 21:53:46,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1517 transitions. [2022-07-22 21:53:46,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:53:46,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1517 transitions. [2022-07-22 21:53:46,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.8125) internal successors, (1517), 16 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:46,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:46,752 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:46,752 INFO L186 Difference]: Start difference. First operand has 164 places, 146 transitions, 478 flow. Second operand 16 states and 1517 transitions. [2022-07-22 21:53:46,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 185 transitions, 897 flow [2022-07-22 21:53:46,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 185 transitions, 809 flow, removed 26 selfloop flow, removed 12 redundant places. [2022-07-22 21:53:46,762 INFO L242 Difference]: Finished difference. Result has 172 places, 158 transitions, 611 flow [2022-07-22 21:53:46,762 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=611, PETRI_PLACES=172, PETRI_TRANSITIONS=158} [2022-07-22 21:53:46,763 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 42 predicate places. [2022-07-22 21:53:46,763 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 158 transitions, 611 flow [2022-07-22 21:53:46,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:46,764 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:53:46,764 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] [2022-07-22 21:53:46,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:53:46,764 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:53:46,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:53:46,765 INFO L85 PathProgramCache]: Analyzing trace with hash 590353226, now seen corresponding path program 5 times [2022-07-22 21:53:46,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:53:46,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681034332] [2022-07-22 21:53:46,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:46,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:53:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:47,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:53:47,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:53:47,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681034332] [2022-07-22 21:53:47,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681034332] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:53:47,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:53:47,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-22 21:53:47,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309472232] [2022-07-22 21:53:47,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:53:47,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 21:53:47,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:53:47,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 21:53:47,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-07-22 21:53:47,186 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-22 21:53:47,188 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 158 transitions, 611 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:47,188 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:53:47,188 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-22 21:53:47,188 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:53:47,534 INFO L129 PetriNetUnfolder]: 145/538 cut-off events. [2022-07-22 21:53:47,534 INFO L130 PetriNetUnfolder]: For 746/746 co-relation queries the response was YES. [2022-07-22 21:53:47,536 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1528 conditions, 538 events. 145/538 cut-off events. For 746/746 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2727 event pairs, 48 based on Foata normal form. 1/529 useless extension candidates. Maximal degree in co-relation 1504. Up to 241 conditions per place. [2022-07-22 21:53:47,539 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 74 selfloop transitions, 35 changer transitions 6/195 dead transitions. [2022-07-22 21:53:47,539 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 195 transitions, 1073 flow [2022-07-22 21:53:47,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 21:53:47,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-22 21:53:47,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1519 transitions. [2022-07-22 21:53:47,543 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6547413793103448 [2022-07-22 21:53:47,543 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1519 transitions. [2022-07-22 21:53:47,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1519 transitions. [2022-07-22 21:53:47,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:53:47,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1519 transitions. [2022-07-22 21:53:47,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.9375) internal successors, (1519), 16 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:47,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:47,554 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:47,555 INFO L186 Difference]: Start difference. First operand has 172 places, 158 transitions, 611 flow. Second operand 16 states and 1519 transitions. [2022-07-22 21:53:47,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 195 transitions, 1073 flow [2022-07-22 21:53:47,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 195 transitions, 1012 flow, removed 15 selfloop flow, removed 9 redundant places. [2022-07-22 21:53:47,563 INFO L242 Difference]: Finished difference. Result has 183 places, 171 transitions, 811 flow [2022-07-22 21:53:47,563 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=811, PETRI_PLACES=183, PETRI_TRANSITIONS=171} [2022-07-22 21:53:47,564 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 53 predicate places. [2022-07-22 21:53:47,564 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 171 transitions, 811 flow [2022-07-22 21:53:47,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:47,565 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:53:47,565 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] [2022-07-22 21:53:47,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:53:47,565 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:53:47,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:53:47,566 INFO L85 PathProgramCache]: Analyzing trace with hash -739549564, now seen corresponding path program 6 times [2022-07-22 21:53:47,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:53:47,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333273646] [2022-07-22 21:53:47,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:47,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:53:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:53:47,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:53:47,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333273646] [2022-07-22 21:53:47,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333273646] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:53:47,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:53:47,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-22 21:53:47,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530693996] [2022-07-22 21:53:47,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:53:47,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 21:53:47,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:53:47,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 21:53:47,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-07-22 21:53:47,929 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-22 21:53:47,931 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 171 transitions, 811 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:47,931 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:53:47,931 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-22 21:53:47,931 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:53:48,279 INFO L129 PetriNetUnfolder]: 146/545 cut-off events. [2022-07-22 21:53:48,279 INFO L130 PetriNetUnfolder]: For 1213/1213 co-relation queries the response was YES. [2022-07-22 21:53:48,282 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1679 conditions, 545 events. 146/545 cut-off events. For 1213/1213 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2771 event pairs, 43 based on Foata normal form. 1/536 useless extension candidates. Maximal degree in co-relation 1650. Up to 255 conditions per place. [2022-07-22 21:53:48,285 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 78 selfloop transitions, 30 changer transitions 7/195 dead transitions. [2022-07-22 21:53:48,285 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 195 transitions, 1182 flow [2022-07-22 21:53:48,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 21:53:48,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-22 21:53:48,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1512 transitions. [2022-07-22 21:53:48,289 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6517241379310345 [2022-07-22 21:53:48,289 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1512 transitions. [2022-07-22 21:53:48,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1512 transitions. [2022-07-22 21:53:48,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:53:48,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1512 transitions. [2022-07-22 21:53:48,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.5) internal successors, (1512), 16 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:48,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:48,297 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:48,298 INFO L186 Difference]: Start difference. First operand has 183 places, 171 transitions, 811 flow. Second operand 16 states and 1512 transitions. [2022-07-22 21:53:48,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 195 transitions, 1182 flow [2022-07-22 21:53:48,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 195 transitions, 1101 flow, removed 36 selfloop flow, removed 7 redundant places. [2022-07-22 21:53:48,307 INFO L242 Difference]: Finished difference. Result has 192 places, 173 transitions, 828 flow [2022-07-22 21:53:48,307 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=828, PETRI_PLACES=192, PETRI_TRANSITIONS=173} [2022-07-22 21:53:48,308 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 62 predicate places. [2022-07-22 21:53:48,308 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 173 transitions, 828 flow [2022-07-22 21:53:48,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:48,308 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:53:48,309 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] [2022-07-22 21:53:48,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 21:53:48,309 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:53:48,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:53:48,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1259341386, now seen corresponding path program 7 times [2022-07-22 21:53:48,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:53:48,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406077067] [2022-07-22 21:53:48,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:48,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:53:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:53:48,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:53:48,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406077067] [2022-07-22 21:53:48,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406077067] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:53:48,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:53:48,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-22 21:53:48,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139033124] [2022-07-22 21:53:48,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:53:48,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 21:53:48,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:53:48,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 21:53:48,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-07-22 21:53:48,690 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-22 21:53:48,691 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 173 transitions, 828 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:48,692 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:53:48,692 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-22 21:53:48,692 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:53:49,034 INFO L129 PetriNetUnfolder]: 149/551 cut-off events. [2022-07-22 21:53:49,034 INFO L130 PetriNetUnfolder]: For 1324/1324 co-relation queries the response was YES. [2022-07-22 21:53:49,037 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1711 conditions, 551 events. 149/551 cut-off events. For 1324/1324 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2854 event pairs, 45 based on Foata normal form. 1/543 useless extension candidates. Maximal degree in co-relation 1681. Up to 255 conditions per place. [2022-07-22 21:53:49,040 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 80 selfloop transitions, 31 changer transitions 6/197 dead transitions. [2022-07-22 21:53:49,040 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 197 transitions, 1208 flow [2022-07-22 21:53:49,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 21:53:49,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-22 21:53:49,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1514 transitions. [2022-07-22 21:53:49,044 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6525862068965518 [2022-07-22 21:53:49,045 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1514 transitions. [2022-07-22 21:53:49,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1514 transitions. [2022-07-22 21:53:49,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:53:49,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1514 transitions. [2022-07-22 21:53:49,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.625) internal successors, (1514), 16 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:49,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:49,053 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:49,053 INFO L186 Difference]: Start difference. First operand has 192 places, 173 transitions, 828 flow. Second operand 16 states and 1514 transitions. [2022-07-22 21:53:49,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 197 transitions, 1208 flow [2022-07-22 21:53:49,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 197 transitions, 1137 flow, removed 11 selfloop flow, removed 12 redundant places. [2022-07-22 21:53:49,062 INFO L242 Difference]: Finished difference. Result has 195 places, 174 transitions, 851 flow [2022-07-22 21:53:49,062 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=851, PETRI_PLACES=195, PETRI_TRANSITIONS=174} [2022-07-22 21:53:49,063 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 65 predicate places. [2022-07-22 21:53:49,063 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 174 transitions, 851 flow [2022-07-22 21:53:49,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:49,064 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:53:49,064 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] [2022-07-22 21:53:49,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 21:53:49,065 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:53:49,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:53:49,065 INFO L85 PathProgramCache]: Analyzing trace with hash -677590396, now seen corresponding path program 8 times [2022-07-22 21:53:49,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:53:49,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980032216] [2022-07-22 21:53:49,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:49,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:53:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:49,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:53:49,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:53:49,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980032216] [2022-07-22 21:53:49,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980032216] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:53:49,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:53:49,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-22 21:53:49,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964294818] [2022-07-22 21:53:49,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:53:49,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 21:53:49,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:53:49,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 21:53:49,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-07-22 21:53:49,450 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-22 21:53:49,451 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 174 transitions, 851 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:49,451 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:53:49,451 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-22 21:53:49,452 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:53:49,893 INFO L129 PetriNetUnfolder]: 153/574 cut-off events. [2022-07-22 21:53:49,893 INFO L130 PetriNetUnfolder]: For 1672/1672 co-relation queries the response was YES. [2022-07-22 21:53:49,896 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1814 conditions, 574 events. 153/574 cut-off events. For 1672/1672 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3054 event pairs, 47 based on Foata normal form. 1/566 useless extension candidates. Maximal degree in co-relation 1783. Up to 247 conditions per place. [2022-07-22 21:53:49,899 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 80 selfloop transitions, 36 changer transitions 6/202 dead transitions. [2022-07-22 21:53:49,899 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 202 transitions, 1281 flow [2022-07-22 21:53:49,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 21:53:49,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-22 21:53:49,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1607 transitions. [2022-07-22 21:53:49,902 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6519269776876268 [2022-07-22 21:53:49,902 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1607 transitions. [2022-07-22 21:53:49,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1607 transitions. [2022-07-22 21:53:49,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:53:49,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1607 transitions. [2022-07-22 21:53:49,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 94.52941176470588) internal successors, (1607), 17 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:49,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:49,926 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:49,927 INFO L186 Difference]: Start difference. First operand has 195 places, 174 transitions, 851 flow. Second operand 17 states and 1607 transitions. [2022-07-22 21:53:49,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 202 transitions, 1281 flow [2022-07-22 21:53:49,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 202 transitions, 1197 flow, removed 12 selfloop flow, removed 14 redundant places. [2022-07-22 21:53:49,936 INFO L242 Difference]: Finished difference. Result has 200 places, 177 transitions, 904 flow [2022-07-22 21:53:49,937 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=904, PETRI_PLACES=200, PETRI_TRANSITIONS=177} [2022-07-22 21:53:49,937 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 70 predicate places. [2022-07-22 21:53:49,937 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 177 transitions, 904 flow [2022-07-22 21:53:49,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:49,939 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:53:49,939 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] [2022-07-22 21:53:49,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 21:53:49,939 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:53:49,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:53:49,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1724094068, now seen corresponding path program 9 times [2022-07-22 21:53:49,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:53:49,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844150359] [2022-07-22 21:53:49,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:49,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:53:49,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:50,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:53:50,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:53:50,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844150359] [2022-07-22 21:53:50,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844150359] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:53:50,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:53:50,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-22 21:53:50,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357929334] [2022-07-22 21:53:50,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:53:50,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 21:53:50,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:53:50,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 21:53:50,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-07-22 21:53:50,252 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-22 21:53:50,253 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 177 transitions, 904 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:50,253 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:53:50,253 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-22 21:53:50,253 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:53:50,663 INFO L129 PetriNetUnfolder]: 154/581 cut-off events. [2022-07-22 21:53:50,663 INFO L130 PetriNetUnfolder]: For 2009/2009 co-relation queries the response was YES. [2022-07-22 21:53:50,666 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1899 conditions, 581 events. 154/581 cut-off events. For 2009/2009 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3133 event pairs, 53 based on Foata normal form. 1/569 useless extension candidates. Maximal degree in co-relation 1865. Up to 275 conditions per place. [2022-07-22 21:53:50,669 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 83 selfloop transitions, 32 changer transitions 7/202 dead transitions. [2022-07-22 21:53:50,669 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 202 transitions, 1342 flow [2022-07-22 21:53:50,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 21:53:50,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-22 21:53:50,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1514 transitions. [2022-07-22 21:53:50,672 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6525862068965518 [2022-07-22 21:53:50,672 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1514 transitions. [2022-07-22 21:53:50,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1514 transitions. [2022-07-22 21:53:50,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:53:50,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1514 transitions. [2022-07-22 21:53:50,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.625) internal successors, (1514), 16 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:50,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:50,679 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:50,679 INFO L186 Difference]: Start difference. First operand has 200 places, 177 transitions, 904 flow. Second operand 16 states and 1514 transitions. [2022-07-22 21:53:50,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 202 transitions, 1342 flow [2022-07-22 21:53:50,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 202 transitions, 1230 flow, removed 24 selfloop flow, removed 13 redundant places. [2022-07-22 21:53:50,690 INFO L242 Difference]: Finished difference. Result has 203 places, 179 transitions, 917 flow [2022-07-22 21:53:50,691 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=917, PETRI_PLACES=203, PETRI_TRANSITIONS=179} [2022-07-22 21:53:50,691 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 73 predicate places. [2022-07-22 21:53:50,692 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 179 transitions, 917 flow [2022-07-22 21:53:50,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:50,692 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:53:50,692 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] [2022-07-22 21:53:50,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 21:53:50,693 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:53:50,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:53:50,693 INFO L85 PathProgramCache]: Analyzing trace with hash -861930582, now seen corresponding path program 10 times [2022-07-22 21:53:50,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:53:50,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786343225] [2022-07-22 21:53:50,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:50,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:53:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:53:51,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:53:51,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786343225] [2022-07-22 21:53:51,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786343225] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:53:51,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:53:51,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-22 21:53:51,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319025113] [2022-07-22 21:53:51,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:53:51,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 21:53:51,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:53:51,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 21:53:51,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-07-22 21:53:51,085 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-22 21:53:51,086 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 179 transitions, 917 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:51,086 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:53:51,086 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-22 21:53:51,086 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:53:51,468 INFO L129 PetriNetUnfolder]: 157/584 cut-off events. [2022-07-22 21:53:51,469 INFO L130 PetriNetUnfolder]: For 1973/1973 co-relation queries the response was YES. [2022-07-22 21:53:51,472 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1911 conditions, 584 events. 157/584 cut-off events. For 1973/1973 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3162 event pairs, 47 based on Foata normal form. 1/574 useless extension candidates. Maximal degree in co-relation 1876. Up to 275 conditions per place. [2022-07-22 21:53:51,474 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 85 selfloop transitions, 33 changer transitions 6/204 dead transitions. [2022-07-22 21:53:51,475 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 204 transitions, 1344 flow [2022-07-22 21:53:51,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 21:53:51,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-22 21:53:51,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1516 transitions. [2022-07-22 21:53:51,478 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.653448275862069 [2022-07-22 21:53:51,478 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1516 transitions. [2022-07-22 21:53:51,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1516 transitions. [2022-07-22 21:53:51,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:53:51,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1516 transitions. [2022-07-22 21:53:51,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.75) internal successors, (1516), 16 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:51,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:51,485 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:51,485 INFO L186 Difference]: Start difference. First operand has 203 places, 179 transitions, 917 flow. Second operand 16 states and 1516 transitions. [2022-07-22 21:53:51,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 204 transitions, 1344 flow [2022-07-22 21:53:51,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 204 transitions, 1266 flow, removed 13 selfloop flow, removed 12 redundant places. [2022-07-22 21:53:51,497 INFO L242 Difference]: Finished difference. Result has 206 places, 180 transitions, 941 flow [2022-07-22 21:53:51,497 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=941, PETRI_PLACES=206, PETRI_TRANSITIONS=180} [2022-07-22 21:53:51,499 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 76 predicate places. [2022-07-22 21:53:51,499 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 180 transitions, 941 flow [2022-07-22 21:53:51,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:51,499 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:53:51,500 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] [2022-07-22 21:53:51,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 21:53:51,500 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:53:51,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:53:51,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1058454566, now seen corresponding path program 11 times [2022-07-22 21:53:51,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:53:51,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330892309] [2022-07-22 21:53:51,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:51,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:53:51,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:51,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:53:51,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:53:51,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330892309] [2022-07-22 21:53:51,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330892309] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:53:51,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:53:51,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-22 21:53:51,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801045704] [2022-07-22 21:53:51,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:53:51,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 21:53:51,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:53:51,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 21:53:51,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-07-22 21:53:51,882 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-22 21:53:51,884 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 180 transitions, 941 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:51,884 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:53:51,884 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-22 21:53:51,885 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:53:52,309 INFO L129 PetriNetUnfolder]: 159/598 cut-off events. [2022-07-22 21:53:52,309 INFO L130 PetriNetUnfolder]: For 2405/2405 co-relation queries the response was YES. [2022-07-22 21:53:52,312 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1987 conditions, 598 events. 159/598 cut-off events. For 2405/2405 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3280 event pairs, 51 based on Foata normal form. 1/588 useless extension candidates. Maximal degree in co-relation 1951. Up to 261 conditions per place. [2022-07-22 21:53:52,315 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 82 selfloop transitions, 39 changer transitions 6/207 dead transitions. [2022-07-22 21:53:52,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 207 transitions, 1403 flow [2022-07-22 21:53:52,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 21:53:52,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-22 21:53:52,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1609 transitions. [2022-07-22 21:53:52,320 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.652738336713996 [2022-07-22 21:53:52,320 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1609 transitions. [2022-07-22 21:53:52,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1609 transitions. [2022-07-22 21:53:52,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:53:52,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1609 transitions. [2022-07-22 21:53:52,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 94.6470588235294) internal successors, (1609), 17 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:52,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:52,330 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:52,330 INFO L186 Difference]: Start difference. First operand has 206 places, 180 transitions, 941 flow. Second operand 17 states and 1609 transitions. [2022-07-22 21:53:52,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 207 transitions, 1403 flow [2022-07-22 21:53:52,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 207 transitions, 1311 flow, removed 14 selfloop flow, removed 14 redundant places. [2022-07-22 21:53:52,348 INFO L242 Difference]: Finished difference. Result has 210 places, 182 transitions, 982 flow [2022-07-22 21:53:52,348 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=982, PETRI_PLACES=210, PETRI_TRANSITIONS=182} [2022-07-22 21:53:52,349 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 80 predicate places. [2022-07-22 21:53:52,349 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 182 transitions, 982 flow [2022-07-22 21:53:52,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:52,350 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:53:52,350 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] [2022-07-22 21:53:52,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 21:53:52,351 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:53:52,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:53:52,351 INFO L85 PathProgramCache]: Analyzing trace with hash 789017708, now seen corresponding path program 12 times [2022-07-22 21:53:52,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:53:52,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942135933] [2022-07-22 21:53:52,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:52,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:53:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:52,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:53:52,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:53:52,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942135933] [2022-07-22 21:53:52,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942135933] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:53:52,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:53:52,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-22 21:53:52,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158027321] [2022-07-22 21:53:52,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:53:52,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 21:53:52,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:53:52,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 21:53:52,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-07-22 21:53:52,691 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-22 21:53:52,692 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 182 transitions, 982 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:52,692 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:53:52,692 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-22 21:53:52,692 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:53:53,090 INFO L129 PetriNetUnfolder]: 160/599 cut-off events. [2022-07-22 21:53:53,091 INFO L130 PetriNetUnfolder]: For 2745/2745 co-relation queries the response was YES. [2022-07-22 21:53:53,094 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2052 conditions, 599 events. 160/599 cut-off events. For 2745/2745 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3244 event pairs, 79 based on Foata normal form. 1/585 useless extension candidates. Maximal degree in co-relation 2014. Up to 289 conditions per place. [2022-07-22 21:53:53,097 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 85 selfloop transitions, 35 changer transitions 7/207 dead transitions. [2022-07-22 21:53:53,097 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 207 transitions, 1461 flow [2022-07-22 21:53:53,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 21:53:53,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-22 21:53:53,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1516 transitions. [2022-07-22 21:53:53,100 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.653448275862069 [2022-07-22 21:53:53,100 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1516 transitions. [2022-07-22 21:53:53,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1516 transitions. [2022-07-22 21:53:53,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:53:53,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1516 transitions. [2022-07-22 21:53:53,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.75) internal successors, (1516), 16 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:53,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:53,109 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:53,109 INFO L186 Difference]: Start difference. First operand has 210 places, 182 transitions, 982 flow. Second operand 16 states and 1516 transitions. [2022-07-22 21:53:53,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 207 transitions, 1461 flow [2022-07-22 21:53:53,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 207 transitions, 1330 flow, removed 28 selfloop flow, removed 14 redundant places. [2022-07-22 21:53:53,123 INFO L242 Difference]: Finished difference. Result has 212 places, 184 transitions, 987 flow [2022-07-22 21:53:53,123 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=987, PETRI_PLACES=212, PETRI_TRANSITIONS=184} [2022-07-22 21:53:53,124 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 82 predicate places. [2022-07-22 21:53:53,124 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 184 transitions, 987 flow [2022-07-22 21:53:53,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:53,125 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:53:53,125 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] [2022-07-22 21:53:53,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 21:53:53,125 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:53:53,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:53:53,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1447154114, now seen corresponding path program 13 times [2022-07-22 21:53:53,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:53:53,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394469860] [2022-07-22 21:53:53,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:53,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:53:53,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:53:53,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:53:53,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394469860] [2022-07-22 21:53:53,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394469860] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:53:53,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:53:53,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-22 21:53:53,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19598376] [2022-07-22 21:53:53,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:53:53,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 21:53:53,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:53:53,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 21:53:53,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-07-22 21:53:53,478 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-22 21:53:53,479 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 184 transitions, 987 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:53,479 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:53:53,479 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-22 21:53:53,479 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:53:53,825 INFO L129 PetriNetUnfolder]: 163/605 cut-off events. [2022-07-22 21:53:53,826 INFO L130 PetriNetUnfolder]: For 2717/2717 co-relation queries the response was YES. [2022-07-22 21:53:53,829 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2060 conditions, 605 events. 163/605 cut-off events. For 2717/2717 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3300 event pairs, 82 based on Foata normal form. 1/592 useless extension candidates. Maximal degree in co-relation 2022. Up to 289 conditions per place. [2022-07-22 21:53:53,831 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 87 selfloop transitions, 36 changer transitions 6/209 dead transitions. [2022-07-22 21:53:53,832 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 209 transitions, 1453 flow [2022-07-22 21:53:53,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 21:53:53,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-22 21:53:53,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1518 transitions. [2022-07-22 21:53:53,834 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6543103448275862 [2022-07-22 21:53:53,834 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1518 transitions. [2022-07-22 21:53:53,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1518 transitions. [2022-07-22 21:53:53,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:53:53,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1518 transitions. [2022-07-22 21:53:53,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.875) internal successors, (1518), 16 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:53,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:53,840 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:53,841 INFO L186 Difference]: Start difference. First operand has 212 places, 184 transitions, 987 flow. Second operand 16 states and 1518 transitions. [2022-07-22 21:53:53,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 209 transitions, 1453 flow [2022-07-22 21:53:53,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 209 transitions, 1366 flow, removed 15 selfloop flow, removed 12 redundant places. [2022-07-22 21:53:53,854 INFO L242 Difference]: Finished difference. Result has 215 places, 185 transitions, 1012 flow [2022-07-22 21:53:53,855 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1012, PETRI_PLACES=215, PETRI_TRANSITIONS=185} [2022-07-22 21:53:53,856 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 85 predicate places. [2022-07-22 21:53:53,856 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 185 transitions, 1012 flow [2022-07-22 21:53:53,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:53,857 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:53:53,857 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-22 21:53:53,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 21:53:53,858 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:53:53,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:53:53,859 INFO L85 PathProgramCache]: Analyzing trace with hash -414570916, now seen corresponding path program 1 times [2022-07-22 21:53:53,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:53:53,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371891263] [2022-07-22 21:53:53,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:53,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:53:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:53,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:53:53,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:53:53,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371891263] [2022-07-22 21:53:53,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371891263] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:53:53,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506886179] [2022-07-22 21:53:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:53,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:53:53,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:53:53,923 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) [2022-07-22 21:53:53,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:53:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:54,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 21:53:54,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:53:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:54,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:53:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:54,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506886179] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:53:54,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:53:54,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 22 [2022-07-22 21:53:54,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013279685] [2022-07-22 21:53:54,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:53:54,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 21:53:54,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:53:54,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 21:53:54,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-07-22 21:53:54,926 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 145 [2022-07-22 21:53:54,927 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 185 transitions, 1012 flow. Second operand has 22 states, 22 states have (on average 112.95454545454545) internal successors, (2485), 22 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:54,928 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:53:54,928 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 145 [2022-07-22 21:53:54,928 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:53:55,420 INFO L129 PetriNetUnfolder]: 69/767 cut-off events. [2022-07-22 21:53:55,420 INFO L130 PetriNetUnfolder]: For 5719/5871 co-relation queries the response was YES. [2022-07-22 21:53:55,425 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2282 conditions, 767 events. 69/767 cut-off events. For 5719/5871 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5090 event pairs, 8 based on Foata normal form. 96/853 useless extension candidates. Maximal degree in co-relation 2243. Up to 74 conditions per place. [2022-07-22 21:53:55,428 INFO L132 encePairwiseOnDemand]: 129/145 looper letters, 37 selfloop transitions, 23 changer transitions 39/205 dead transitions. [2022-07-22 21:53:55,428 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 205 transitions, 1189 flow [2022-07-22 21:53:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 21:53:55,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-22 21:53:55,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2154 transitions. [2022-07-22 21:53:55,432 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7818511796733212 [2022-07-22 21:53:55,432 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2154 transitions. [2022-07-22 21:53:55,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2154 transitions. [2022-07-22 21:53:55,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:53:55,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2154 transitions. [2022-07-22 21:53:55,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 113.36842105263158) internal successors, (2154), 19 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:55,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 145.0) internal successors, (2900), 20 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:55,440 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 145.0) internal successors, (2900), 20 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:55,440 INFO L186 Difference]: Start difference. First operand has 215 places, 185 transitions, 1012 flow. Second operand 19 states and 2154 transitions. [2022-07-22 21:53:55,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 205 transitions, 1189 flow [2022-07-22 21:53:55,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 205 transitions, 1095 flow, removed 3 selfloop flow, removed 19 redundant places. [2022-07-22 21:53:55,454 INFO L242 Difference]: Finished difference. Result has 217 places, 146 transitions, 631 flow [2022-07-22 21:53:55,454 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=631, PETRI_PLACES=217, PETRI_TRANSITIONS=146} [2022-07-22 21:53:55,454 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 87 predicate places. [2022-07-22 21:53:55,455 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 146 transitions, 631 flow [2022-07-22 21:53:55,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 112.95454545454545) internal successors, (2485), 22 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:55,456 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:53:55,456 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] [2022-07-22 21:53:55,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:53:55,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 21:53:55,681 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:53:55,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:53:55,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1913345623, now seen corresponding path program 1 times [2022-07-22 21:53:55,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:53:55,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477724339] [2022-07-22 21:53:55,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:55,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:53:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:55,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:55,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:53:55,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477724339] [2022-07-22 21:53:55,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477724339] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:53:55,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310470621] [2022-07-22 21:53:55,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:55,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:53:55,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:53:55,760 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) [2022-07-22 21:53:55,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:53:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:55,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 21:53:55,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:53:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:56,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:53:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:56,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310470621] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:53:56,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:53:56,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-22 21:53:56,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877073216] [2022-07-22 21:53:56,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:53:56,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:53:56,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:53:56,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:53:56,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:53:56,254 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 145 [2022-07-22 21:53:56,255 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 146 transitions, 631 flow. Second operand has 19 states, 19 states have (on average 114.63157894736842) internal successors, (2178), 19 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:56,255 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:53:56,256 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 145 [2022-07-22 21:53:56,256 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:53:56,539 INFO L129 PetriNetUnfolder]: 40/411 cut-off events. [2022-07-22 21:53:56,539 INFO L130 PetriNetUnfolder]: For 2386/2444 co-relation queries the response was YES. [2022-07-22 21:53:56,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1204 conditions, 411 events. 40/411 cut-off events. For 2386/2444 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1532 event pairs, 11 based on Foata normal form. 9/413 useless extension candidates. Maximal degree in co-relation 1165. Up to 58 conditions per place. [2022-07-22 21:53:56,543 INFO L132 encePairwiseOnDemand]: 133/145 looper letters, 28 selfloop transitions, 11 changer transitions 6/153 dead transitions. [2022-07-22 21:53:56,543 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 153 transitions, 742 flow [2022-07-22 21:53:56,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 21:53:56,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-22 21:53:56,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1385 transitions. [2022-07-22 21:53:56,547 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7959770114942529 [2022-07-22 21:53:56,547 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1385 transitions. [2022-07-22 21:53:56,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1385 transitions. [2022-07-22 21:53:56,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:53:56,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1385 transitions. [2022-07-22 21:53:56,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 115.41666666666667) internal successors, (1385), 12 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:56,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 145.0) internal successors, (1885), 13 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:56,552 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 145.0) internal successors, (1885), 13 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:56,552 INFO L186 Difference]: Start difference. First operand has 217 places, 146 transitions, 631 flow. Second operand 12 states and 1385 transitions. [2022-07-22 21:53:56,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 153 transitions, 742 flow [2022-07-22 21:53:56,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 153 transitions, 575 flow, removed 62 selfloop flow, removed 31 redundant places. [2022-07-22 21:53:56,559 INFO L242 Difference]: Finished difference. Result has 168 places, 143 transitions, 476 flow [2022-07-22 21:53:56,559 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=476, PETRI_PLACES=168, PETRI_TRANSITIONS=143} [2022-07-22 21:53:56,560 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 38 predicate places. [2022-07-22 21:53:56,560 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 143 transitions, 476 flow [2022-07-22 21:53:56,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 114.63157894736842) internal successors, (2178), 19 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:56,561 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:53:56,561 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] [2022-07-22 21:53:56,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:53:56,775 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,SelfDestructingSolverStorable16 [2022-07-22 21:53:56,775 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:53:56,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:53:56,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1401002454, now seen corresponding path program 2 times [2022-07-22 21:53:56,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:53:56,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052178466] [2022-07-22 21:53:56,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:56,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:53:56,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:57,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:53:57,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052178466] [2022-07-22 21:53:57,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052178466] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:53:57,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595355491] [2022-07-22 21:53:57,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:53:57,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:53:57,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:53:57,380 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) [2022-07-22 21:53:57,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:53:57,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:53:57,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:53:57,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-22 21:53:57,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:53:58,128 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-22 21:53:58,129 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 24 treesize of output 10 [2022-07-22 21:53:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:58,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:53:58,345 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-22 21:53:58,345 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 [2022-07-22 21:53:59,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:59,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595355491] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:53:59,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:53:59,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 14] total 44 [2022-07-22 21:53:59,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285978560] [2022-07-22 21:53:59,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:53:59,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-22 21:53:59,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:53:59,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-22 21:53:59,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1617, Unknown=0, NotChecked=0, Total=1892 [2022-07-22 21:53:59,015 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 145 [2022-07-22 21:53:59,018 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 143 transitions, 476 flow. Second operand has 44 states, 44 states have (on average 76.47727272727273) internal successors, (3365), 44 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:59,018 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:53:59,018 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 145 [2022-07-22 21:53:59,018 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:02,176 INFO L129 PetriNetUnfolder]: 986/3457 cut-off events. [2022-07-22 21:54:02,176 INFO L130 PetriNetUnfolder]: For 3754/3882 co-relation queries the response was YES. [2022-07-22 21:54:02,185 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8014 conditions, 3457 events. 986/3457 cut-off events. For 3754/3882 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 31081 event pairs, 142 based on Foata normal form. 56/3287 useless extension candidates. Maximal degree in co-relation 7994. Up to 434 conditions per place. [2022-07-22 21:54:02,196 INFO L132 encePairwiseOnDemand]: 113/145 looper letters, 267 selfloop transitions, 121 changer transitions 0/459 dead transitions. [2022-07-22 21:54:02,196 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 459 transitions, 2504 flow [2022-07-22 21:54:02,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-22 21:54:02,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-22 21:54:02,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4145 transitions. [2022-07-22 21:54:02,201 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5497347480106101 [2022-07-22 21:54:02,201 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4145 transitions. [2022-07-22 21:54:02,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4145 transitions. [2022-07-22 21:54:02,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:02,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4145 transitions. [2022-07-22 21:54:02,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 79.71153846153847) internal successors, (4145), 52 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:02,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 145.0) internal successors, (7685), 53 states have internal predecessors, (7685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:02,217 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 145.0) internal successors, (7685), 53 states have internal predecessors, (7685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:02,217 INFO L186 Difference]: Start difference. First operand has 168 places, 143 transitions, 476 flow. Second operand 52 states and 4145 transitions. [2022-07-22 21:54:02,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 459 transitions, 2504 flow [2022-07-22 21:54:02,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 459 transitions, 2410 flow, removed 34 selfloop flow, removed 10 redundant places. [2022-07-22 21:54:02,233 INFO L242 Difference]: Finished difference. Result has 229 places, 271 transitions, 1658 flow [2022-07-22 21:54:02,234 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=1658, PETRI_PLACES=229, PETRI_TRANSITIONS=271} [2022-07-22 21:54:02,234 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 99 predicate places. [2022-07-22 21:54:02,234 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 271 transitions, 1658 flow [2022-07-22 21:54:02,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 76.47727272727273) internal successors, (3365), 44 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:02,236 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:02,236 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] [2022-07-22 21:54:02,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:54:02,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 21:54:02,452 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:54:02,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:02,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1534631996, now seen corresponding path program 3 times [2022-07-22 21:54:02,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:02,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197261709] [2022-07-22 21:54:02,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:02,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:02,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:02,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197261709] [2022-07-22 21:54:02,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197261709] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:54:02,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496710741] [2022-07-22 21:54:02,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:54:02,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:54:02,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:54:02,840 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) [2022-07-22 21:54:02,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:54:02,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 21:54:02,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:54:02,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 21:54:02,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:54:03,284 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 21:54:03,285 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 [2022-07-22 21:54:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:54:03,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:54:03,355 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-22 21:54:03,355 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 [2022-07-22 21:54:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:54:03,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496710741] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:54:03,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:54:03,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 5, 5] total 22 [2022-07-22 21:54:03,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773991438] [2022-07-22 21:54:03,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:54:03,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 21:54:03,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:03,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 21:54:03,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-07-22 21:54:03,538 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 145 [2022-07-22 21:54:03,539 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 271 transitions, 1658 flow. Second operand has 22 states, 22 states have (on average 94.95454545454545) internal successors, (2089), 22 states have internal predecessors, (2089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:03,540 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:03,540 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 145 [2022-07-22 21:54:03,540 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:04,875 INFO L129 PetriNetUnfolder]: 1291/4318 cut-off events. [2022-07-22 21:54:04,875 INFO L130 PetriNetUnfolder]: For 13367/13925 co-relation queries the response was YES. [2022-07-22 21:54:04,903 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12643 conditions, 4318 events. 1291/4318 cut-off events. For 13367/13925 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 40804 event pairs, 278 based on Foata normal form. 174/4266 useless extension candidates. Maximal degree in co-relation 12599. Up to 1358 conditions per place. [2022-07-22 21:54:04,930 INFO L132 encePairwiseOnDemand]: 121/145 looper letters, 211 selfloop transitions, 99 changer transitions 0/395 dead transitions. [2022-07-22 21:54:04,931 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 395 transitions, 3255 flow [2022-07-22 21:54:04,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 21:54:04,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-07-22 21:54:04,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2685 transitions. [2022-07-22 21:54:04,934 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6613300492610837 [2022-07-22 21:54:04,934 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2685 transitions. [2022-07-22 21:54:04,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2685 transitions. [2022-07-22 21:54:04,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:04,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2685 transitions. [2022-07-22 21:54:04,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 95.89285714285714) internal successors, (2685), 28 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:04,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 145.0) internal successors, (4205), 29 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:04,942 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 145.0) internal successors, (4205), 29 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:04,942 INFO L186 Difference]: Start difference. First operand has 229 places, 271 transitions, 1658 flow. Second operand 28 states and 2685 transitions. [2022-07-22 21:54:04,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 395 transitions, 3255 flow [2022-07-22 21:54:05,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 395 transitions, 2929 flow, removed 145 selfloop flow, removed 15 redundant places. [2022-07-22 21:54:05,070 INFO L242 Difference]: Finished difference. Result has 249 places, 328 transitions, 2281 flow [2022-07-22 21:54:05,071 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1444, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2281, PETRI_PLACES=249, PETRI_TRANSITIONS=328} [2022-07-22 21:54:05,071 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 119 predicate places. [2022-07-22 21:54:05,072 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 328 transitions, 2281 flow [2022-07-22 21:54:05,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 94.95454545454545) internal successors, (2089), 22 states have internal predecessors, (2089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:05,073 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:05,073 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] [2022-07-22 21:54:05,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:54:05,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:54:05,274 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:54:05,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:05,274 INFO L85 PathProgramCache]: Analyzing trace with hash -425803110, now seen corresponding path program 4 times [2022-07-22 21:54:05,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:05,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314282271] [2022-07-22 21:54:05,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:05,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:05,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:05,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314282271] [2022-07-22 21:54:05,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314282271] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:54:05,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103457306] [2022-07-22 21:54:05,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:54:05,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:54:05,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:54:05,656 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) [2022-07-22 21:54:05,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:54:05,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:54:05,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:54:05,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-22 21:54:05,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:54:06,433 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-22 21:54:06,434 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 24 treesize of output 10 [2022-07-22 21:54:06,460 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:06,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:54:06,566 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-22 21:54:06,566 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 [2022-07-22 21:54:07,134 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:07,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103457306] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:54:07,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:54:07,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 41 [2022-07-22 21:54:07,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853576442] [2022-07-22 21:54:07,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:54:07,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-22 21:54:07,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:07,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-22 21:54:07,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1368, Unknown=0, NotChecked=0, Total=1640 [2022-07-22 21:54:07,139 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 145 [2022-07-22 21:54:07,141 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 328 transitions, 2281 flow. Second operand has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:07,141 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:07,141 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 145 [2022-07-22 21:54:07,141 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:10,240 INFO L129 PetriNetUnfolder]: 1750/5923 cut-off events. [2022-07-22 21:54:10,240 INFO L130 PetriNetUnfolder]: For 24663/25289 co-relation queries the response was YES. [2022-07-22 21:54:10,289 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19554 conditions, 5923 events. 1750/5923 cut-off events. For 24663/25289 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 57610 event pairs, 236 based on Foata normal form. 263/5901 useless extension candidates. Maximal degree in co-relation 19504. Up to 799 conditions per place. [2022-07-22 21:54:10,321 INFO L132 encePairwiseOnDemand]: 116/145 looper letters, 258 selfloop transitions, 271 changer transitions 3/617 dead transitions. [2022-07-22 21:54:10,322 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 617 transitions, 5886 flow [2022-07-22 21:54:10,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-22 21:54:10,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-07-22 21:54:10,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4750 transitions. [2022-07-22 21:54:10,328 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6685432793807178 [2022-07-22 21:54:10,328 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4750 transitions. [2022-07-22 21:54:10,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4750 transitions. [2022-07-22 21:54:10,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:10,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4750 transitions. [2022-07-22 21:54:10,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 96.93877551020408) internal successors, (4750), 49 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:10,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 145.0) internal successors, (7250), 50 states have internal predecessors, (7250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:10,344 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 145.0) internal successors, (7250), 50 states have internal predecessors, (7250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:10,344 INFO L186 Difference]: Start difference. First operand has 249 places, 328 transitions, 2281 flow. Second operand 49 states and 4750 transitions. [2022-07-22 21:54:10,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 617 transitions, 5886 flow [2022-07-22 21:54:10,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 617 transitions, 5793 flow, removed 27 selfloop flow, removed 18 redundant places. [2022-07-22 21:54:10,507 INFO L242 Difference]: Finished difference. Result has 293 places, 473 transitions, 4512 flow [2022-07-22 21:54:10,508 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=2160, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=4512, PETRI_PLACES=293, PETRI_TRANSITIONS=473} [2022-07-22 21:54:10,508 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 163 predicate places. [2022-07-22 21:54:10,508 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 473 transitions, 4512 flow [2022-07-22 21:54:10,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:10,509 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:10,510 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] [2022-07-22 21:54:10,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:54:10,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:54:10,723 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:54:10,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:10,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1035882360, now seen corresponding path program 5 times [2022-07-22 21:54:10,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:10,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562312714] [2022-07-22 21:54:10,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:10,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:11,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:11,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562312714] [2022-07-22 21:54:11,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562312714] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:54:11,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477663960] [2022-07-22 21:54:11,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:54:11,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:54:11,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:54:11,258 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) [2022-07-22 21:54:11,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:54:11,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-22 21:54:11,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:54:11,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-22 21:54:11,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:54:11,380 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 [2022-07-22 21:54:11,645 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:54:11,645 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 [2022-07-22 21:54:11,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 21:54:12,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:54:12,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-07-22 21:54:12,408 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 [2022-07-22 21:54:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:12,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:54:13,297 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:54:13,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 49 [2022-07-22 21:54:13,307 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-22 21:54:13,307 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 145 treesize of output 136 [2022-07-22 21:54:13,314 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-22 21:54:13,315 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 129 treesize of output 105 [2022-07-22 21:54:13,322 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-22 21:54:13,322 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 105 treesize of output 93 [2022-07-22 21:54:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:13,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477663960] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:54:13,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:54:13,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 21] total 58 [2022-07-22 21:54:13,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872588055] [2022-07-22 21:54:13,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:54:13,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-22 21:54:13,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:13,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-22 21:54:13,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=2694, Unknown=43, NotChecked=0, Total=3306 [2022-07-22 21:54:13,957 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 145 [2022-07-22 21:54:13,960 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 473 transitions, 4512 flow. Second operand has 58 states, 58 states have (on average 83.32758620689656) internal successors, (4833), 58 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:13,960 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:13,960 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 145 [2022-07-22 21:54:13,960 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:18,966 INFO L129 PetriNetUnfolder]: 2786/9128 cut-off events. [2022-07-22 21:54:18,966 INFO L130 PetriNetUnfolder]: For 61556/62973 co-relation queries the response was YES. [2022-07-22 21:54:19,032 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35117 conditions, 9128 events. 2786/9128 cut-off events. For 61556/62973 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 93699 event pairs, 732 based on Foata normal form. 602/9130 useless extension candidates. Maximal degree in co-relation 35051. Up to 1303 conditions per place. [2022-07-22 21:54:19,085 INFO L132 encePairwiseOnDemand]: 118/145 looper letters, 483 selfloop transitions, 260 changer transitions 0/822 dead transitions. [2022-07-22 21:54:19,085 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 822 transitions, 9773 flow [2022-07-22 21:54:19,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-22 21:54:19,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-22 21:54:19,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 5241 transitions. [2022-07-22 21:54:19,096 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5925381571509327 [2022-07-22 21:54:19,096 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 5241 transitions. [2022-07-22 21:54:19,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 5241 transitions. [2022-07-22 21:54:19,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:19,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 5241 transitions. [2022-07-22 21:54:19,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 85.91803278688525) internal successors, (5241), 61 states have internal predecessors, (5241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:19,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 145.0) internal successors, (8990), 62 states have internal predecessors, (8990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:19,125 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 145.0) internal successors, (8990), 62 states have internal predecessors, (8990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:19,126 INFO L186 Difference]: Start difference. First operand has 293 places, 473 transitions, 4512 flow. Second operand 61 states and 5241 transitions. [2022-07-22 21:54:19,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 822 transitions, 9773 flow [2022-07-22 21:54:19,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 822 transitions, 9306 flow, removed 169 selfloop flow, removed 25 redundant places. [2022-07-22 21:54:19,450 INFO L242 Difference]: Finished difference. Result has 347 places, 575 transitions, 6478 flow [2022-07-22 21:54:19,451 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=4073, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=6478, PETRI_PLACES=347, PETRI_TRANSITIONS=575} [2022-07-22 21:54:19,451 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 217 predicate places. [2022-07-22 21:54:19,451 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 575 transitions, 6478 flow [2022-07-22 21:54:19,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 83.32758620689656) internal successors, (4833), 58 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:19,452 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:19,453 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] [2022-07-22 21:54:19,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 21:54:19,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:54:19,656 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:54:19,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:19,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1182492120, now seen corresponding path program 6 times [2022-07-22 21:54:19,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:19,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273983058] [2022-07-22 21:54:19,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:19,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:20,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:20,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273983058] [2022-07-22 21:54:20,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273983058] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:54:20,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448457930] [2022-07-22 21:54:20,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 21:54:20,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:54:20,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:54:20,513 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:54:20,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 21:54:20,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-22 21:54:20,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:54:20,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-22 21:54:20,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:54:21,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:54:21,446 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 19 treesize of output 21 [2022-07-22 21:54:21,560 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-22 21:54:21,560 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 24 treesize of output 10 [2022-07-22 21:54:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:21,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:54:21,841 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:54:21,842 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 [2022-07-22 21:54:21,845 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 [2022-07-22 21:54:23,116 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:23,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448457930] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:54:23,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:54:23,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 20, 21] total 63 [2022-07-22 21:54:23,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524051841] [2022-07-22 21:54:23,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:54:23,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-22 21:54:23,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:23,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-22 21:54:23,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=3542, Unknown=2, NotChecked=0, Total=3906 [2022-07-22 21:54:23,122 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 145 [2022-07-22 21:54:23,124 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 575 transitions, 6478 flow. Second operand has 63 states, 63 states have (on average 61.98412698412698) internal successors, (3905), 63 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:23,124 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:23,124 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 145 [2022-07-22 21:54:23,125 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:27,944 INFO L129 PetriNetUnfolder]: 3470/8565 cut-off events. [2022-07-22 21:54:27,944 INFO L130 PetriNetUnfolder]: For 74613/74703 co-relation queries the response was YES. [2022-07-22 21:54:28,022 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37234 conditions, 8565 events. 3470/8565 cut-off events. For 74613/74703 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 77287 event pairs, 880 based on Foata normal form. 263/8623 useless extension candidates. Maximal degree in co-relation 37151. Up to 1285 conditions per place. [2022-07-22 21:54:28,064 INFO L132 encePairwiseOnDemand]: 116/145 looper letters, 369 selfloop transitions, 164 changer transitions 48/637 dead transitions. [2022-07-22 21:54:28,064 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 637 transitions, 7108 flow [2022-07-22 21:54:28,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-22 21:54:28,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-07-22 21:54:28,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3083 transitions. [2022-07-22 21:54:28,069 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4523844460748349 [2022-07-22 21:54:28,069 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3083 transitions. [2022-07-22 21:54:28,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3083 transitions. [2022-07-22 21:54:28,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:28,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3083 transitions. [2022-07-22 21:54:28,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 65.59574468085107) internal successors, (3083), 47 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:28,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 145.0) internal successors, (6960), 48 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:28,081 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 145.0) internal successors, (6960), 48 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:28,081 INFO L186 Difference]: Start difference. First operand has 347 places, 575 transitions, 6478 flow. Second operand 47 states and 3083 transitions. [2022-07-22 21:54:28,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 637 transitions, 7108 flow [2022-07-22 21:54:28,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 637 transitions, 6646 flow, removed 140 selfloop flow, removed 47 redundant places. [2022-07-22 21:54:28,533 INFO L242 Difference]: Finished difference. Result has 350 places, 414 transitions, 4530 flow [2022-07-22 21:54:28,534 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=3625, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=4530, PETRI_PLACES=350, PETRI_TRANSITIONS=414} [2022-07-22 21:54:28,534 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 220 predicate places. [2022-07-22 21:54:28,534 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 414 transitions, 4530 flow [2022-07-22 21:54:28,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 61.98412698412698) internal successors, (3905), 63 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:28,535 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:28,535 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] [2022-07-22 21:54:28,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 21:54:28,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:54:28,736 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:54:28,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:28,736 INFO L85 PathProgramCache]: Analyzing trace with hash 527677660, now seen corresponding path program 7 times [2022-07-22 21:54:28,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:28,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739595323] [2022-07-22 21:54:28,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:28,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:29,420 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:29,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:29,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739595323] [2022-07-22 21:54:29,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739595323] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:54:29,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535756034] [2022-07-22 21:54:29,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 21:54:29,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:54:29,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:54:29,422 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:54:29,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 21:54:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:29,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-22 21:54:29,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:54:29,532 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 [2022-07-22 21:54:29,681 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:54:29,681 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 [2022-07-22 21:54:30,183 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 [2022-07-22 21:54:30,327 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 [2022-07-22 21:54:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:30,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:54:30,575 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:54:30,575 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 [2022-07-22 21:54:30,579 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 [2022-07-22 21:54:31,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:31,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535756034] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:54:31,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:54:31,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 58 [2022-07-22 21:54:31,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262156317] [2022-07-22 21:54:31,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:54:31,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-22 21:54:31,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:31,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-22 21:54:31,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=3027, Unknown=1, NotChecked=0, Total=3306 [2022-07-22 21:54:31,685 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 145 [2022-07-22 21:54:31,688 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 414 transitions, 4530 flow. Second operand has 58 states, 58 states have (on average 84.32758620689656) internal successors, (4891), 58 states have internal predecessors, (4891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:31,688 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:31,688 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 145 [2022-07-22 21:54:31,688 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:37,764 INFO L129 PetriNetUnfolder]: 1582/5685 cut-off events. [2022-07-22 21:54:37,764 INFO L130 PetriNetUnfolder]: For 58594/59134 co-relation queries the response was YES. [2022-07-22 21:54:37,806 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25243 conditions, 5685 events. 1582/5685 cut-off events. For 58594/59134 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 54641 event pairs, 374 based on Foata normal form. 250/5695 useless extension candidates. Maximal degree in co-relation 25163. Up to 904 conditions per place. [2022-07-22 21:54:37,830 INFO L132 encePairwiseOnDemand]: 117/145 looper letters, 327 selfloop transitions, 242 changer transitions 3/661 dead transitions. [2022-07-22 21:54:37,830 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 661 transitions, 8676 flow [2022-07-22 21:54:37,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-22 21:54:37,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-07-22 21:54:37,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4587 transitions. [2022-07-22 21:54:37,835 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5968770331815224 [2022-07-22 21:54:37,835 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4587 transitions. [2022-07-22 21:54:37,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4587 transitions. [2022-07-22 21:54:37,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:37,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4587 transitions. [2022-07-22 21:54:37,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 86.54716981132076) internal successors, (4587), 53 states have internal predecessors, (4587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:37,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 145.0) internal successors, (7830), 54 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:37,848 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 145.0) internal successors, (7830), 54 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:37,848 INFO L186 Difference]: Start difference. First operand has 350 places, 414 transitions, 4530 flow. Second operand 53 states and 4587 transitions. [2022-07-22 21:54:37,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 661 transitions, 8676 flow [2022-07-22 21:54:38,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 661 transitions, 8421 flow, removed 61 selfloop flow, removed 30 redundant places. [2022-07-22 21:54:38,147 INFO L242 Difference]: Finished difference. Result has 376 places, 497 transitions, 6559 flow [2022-07-22 21:54:38,148 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=4364, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=6559, PETRI_PLACES=376, PETRI_TRANSITIONS=497} [2022-07-22 21:54:38,148 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 246 predicate places. [2022-07-22 21:54:38,148 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 497 transitions, 6559 flow [2022-07-22 21:54:38,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 84.32758620689656) internal successors, (4891), 58 states have internal predecessors, (4891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:38,149 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:38,150 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] [2022-07-22 21:54:38,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 21:54:38,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-22 21:54:38,356 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:54:38,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:38,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1646386628, now seen corresponding path program 8 times [2022-07-22 21:54:38,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:38,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547711245] [2022-07-22 21:54:38,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:38,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:39,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:39,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:39,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547711245] [2022-07-22 21:54:39,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547711245] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:54:39,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229282200] [2022-07-22 21:54:39,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:54:39,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:54:39,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:54:39,024 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:54:39,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 21:54:39,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:54:39,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:54:39,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-22 21:54:39,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:54:39,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:54:39,961 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 19 treesize of output 21 [2022-07-22 21:54:40,246 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-22 21:54:40,247 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 24 treesize of output 10 [2022-07-22 21:54:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:40,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:54:40,551 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:54:40,552 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 [2022-07-22 21:54:40,557 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 [2022-07-22 21:54:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:41,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229282200] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:54:41,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:54:41,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 58 [2022-07-22 21:54:41,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20650885] [2022-07-22 21:54:41,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:54:41,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-22 21:54:41,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:41,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-22 21:54:41,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=3056, Unknown=0, NotChecked=0, Total=3306 [2022-07-22 21:54:41,852 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 145 [2022-07-22 21:54:41,854 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 497 transitions, 6559 flow. Second operand has 58 states, 58 states have (on average 70.79310344827586) internal successors, (4106), 58 states have internal predecessors, (4106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:41,854 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:41,854 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 145 [2022-07-22 21:54:41,854 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:46,506 INFO L129 PetriNetUnfolder]: 1783/6550 cut-off events. [2022-07-22 21:54:46,506 INFO L130 PetriNetUnfolder]: For 78430/79216 co-relation queries the response was YES. [2022-07-22 21:54:46,548 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30605 conditions, 6550 events. 1783/6550 cut-off events. For 78430/79216 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 65799 event pairs, 394 based on Foata normal form. 387/6645 useless extension candidates. Maximal degree in co-relation 30518. Up to 1210 conditions per place. [2022-07-22 21:54:46,568 INFO L132 encePairwiseOnDemand]: 112/145 looper letters, 276 selfloop transitions, 352 changer transitions 0/706 dead transitions. [2022-07-22 21:54:46,569 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 706 transitions, 10811 flow [2022-07-22 21:54:46,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-22 21:54:46,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-07-22 21:54:46,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3189 transitions. [2022-07-22 21:54:46,572 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4998432601880878 [2022-07-22 21:54:46,572 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3189 transitions. [2022-07-22 21:54:46,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3189 transitions. [2022-07-22 21:54:46,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:46,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3189 transitions. [2022-07-22 21:54:46,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 72.47727272727273) internal successors, (3189), 44 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:46,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 145.0) internal successors, (6525), 45 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:46,581 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 145.0) internal successors, (6525), 45 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:46,581 INFO L186 Difference]: Start difference. First operand has 376 places, 497 transitions, 6559 flow. Second operand 44 states and 3189 transitions. [2022-07-22 21:54:46,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 706 transitions, 10811 flow [2022-07-22 21:54:46,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 706 transitions, 10533 flow, removed 73 selfloop flow, removed 31 redundant places. [2022-07-22 21:54:46,866 INFO L242 Difference]: Finished difference. Result has 397 places, 603 transitions, 9597 flow [2022-07-22 21:54:46,867 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=6305, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=9597, PETRI_PLACES=397, PETRI_TRANSITIONS=603} [2022-07-22 21:54:46,867 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 267 predicate places. [2022-07-22 21:54:46,867 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 603 transitions, 9597 flow [2022-07-22 21:54:46,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 70.79310344827586) internal successors, (4106), 58 states have internal predecessors, (4106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:46,868 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:46,869 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] [2022-07-22 21:54:46,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 21:54:47,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-22 21:54:47,084 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:54:47,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:47,084 INFO L85 PathProgramCache]: Analyzing trace with hash -703129418, now seen corresponding path program 9 times [2022-07-22 21:54:47,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:47,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436545439] [2022-07-22 21:54:47,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:47,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:47,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:47,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436545439] [2022-07-22 21:54:47,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436545439] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:54:47,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142308101] [2022-07-22 21:54:47,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:54:47,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:54:47,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:54:47,616 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:54:47,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 21:54:47,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 21:54:47,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:54:47,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 21:54:47,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:54:47,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:54:47,990 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 [2022-07-22 21:54:48,042 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 [2022-07-22 21:54:48,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:54:48,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:54:48,122 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_458 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_458) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) 0))) is different from false [2022-07-22 21:54:48,151 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:54:48,151 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 [2022-07-22 21:54:48,155 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 [2022-07-22 21:54:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 1 not checked. [2022-07-22 21:54:48,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142308101] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:54:48,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:54:48,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 12] total 39 [2022-07-22 21:54:48,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406271781] [2022-07-22 21:54:48,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:54:48,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 21:54:48,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:48,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 21:54:48,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1303, Unknown=1, NotChecked=72, Total=1482 [2022-07-22 21:54:48,528 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 145 [2022-07-22 21:54:48,530 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 603 transitions, 9597 flow. Second operand has 39 states, 39 states have (on average 89.1025641025641) internal successors, (3475), 39 states have internal predecessors, (3475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:48,530 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:48,530 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 145 [2022-07-22 21:54:48,530 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:52,164 INFO L129 PetriNetUnfolder]: 1809/6478 cut-off events. [2022-07-22 21:54:52,164 INFO L130 PetriNetUnfolder]: For 102195/103198 co-relation queries the response was YES. [2022-07-22 21:54:52,218 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33116 conditions, 6478 events. 1809/6478 cut-off events. For 102195/103198 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 64384 event pairs, 518 based on Foata normal form. 548/6712 useless extension candidates. Maximal degree in co-relation 33021. Up to 1081 conditions per place. [2022-07-22 21:54:52,242 INFO L132 encePairwiseOnDemand]: 124/145 looper letters, 328 selfloop transitions, 297 changer transitions 0/717 dead transitions. [2022-07-22 21:54:52,242 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 717 transitions, 12699 flow [2022-07-22 21:54:52,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-22 21:54:52,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-22 21:54:52,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3058 transitions. [2022-07-22 21:54:52,244 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6202839756592292 [2022-07-22 21:54:52,244 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3058 transitions. [2022-07-22 21:54:52,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3058 transitions. [2022-07-22 21:54:52,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:52,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3058 transitions. [2022-07-22 21:54:52,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 89.94117647058823) internal successors, (3058), 34 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:52,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 145.0) internal successors, (5075), 35 states have internal predecessors, (5075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:52,251 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 145.0) internal successors, (5075), 35 states have internal predecessors, (5075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:52,252 INFO L186 Difference]: Start difference. First operand has 397 places, 603 transitions, 9597 flow. Second operand 34 states and 3058 transitions. [2022-07-22 21:54:52,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 717 transitions, 12699 flow [2022-07-22 21:54:52,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 717 transitions, 12174 flow, removed 35 selfloop flow, removed 38 redundant places. [2022-07-22 21:54:52,615 INFO L242 Difference]: Finished difference. Result has 393 places, 629 transitions, 10738 flow [2022-07-22 21:54:52,616 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=9104, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=10738, PETRI_PLACES=393, PETRI_TRANSITIONS=629} [2022-07-22 21:54:52,616 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 263 predicate places. [2022-07-22 21:54:52,616 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 629 transitions, 10738 flow [2022-07-22 21:54:52,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 89.1025641025641) internal successors, (3475), 39 states have internal predecessors, (3475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:52,617 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:52,617 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-22 21:54:52,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-22 21:54:52,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-22 21:54:52,818 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:54:52,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:52,818 INFO L85 PathProgramCache]: Analyzing trace with hash 566654440, now seen corresponding path program 1 times [2022-07-22 21:54:52,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:52,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270386931] [2022-07-22 21:54:52,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:52,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:52,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:55,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:55,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270386931] [2022-07-22 21:54:55,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270386931] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:54:55,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437795748] [2022-07-22 21:54:55,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:55,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:54:55,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:54:55,008 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:54:55,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 21:54:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:55,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-22 21:54:55,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:54:56,460 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 25 treesize of output 7 [2022-07-22 21:54:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:56,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:54:58,078 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:54:58,079 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 36 treesize of output 36 [2022-07-22 21:55:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:01,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437795748] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:55:01,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:55:01,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 31, 30] total 95 [2022-07-22 21:55:01,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596353161] [2022-07-22 21:55:01,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:55:01,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-07-22 21:55:01,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:01,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-07-22 21:55:01,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=8220, Unknown=1, NotChecked=0, Total=8930 [2022-07-22 21:55:01,973 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 145 [2022-07-22 21:55:01,975 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 629 transitions, 10738 flow. Second operand has 95 states, 95 states have (on average 46.61052631578947) internal successors, (4428), 95 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:01,975 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:01,975 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 145 [2022-07-22 21:55:01,975 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:23,258 INFO L129 PetriNetUnfolder]: 7575/16930 cut-off events. [2022-07-22 21:55:23,258 INFO L130 PetriNetUnfolder]: For 279534/279674 co-relation queries the response was YES. [2022-07-22 21:55:23,427 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96578 conditions, 16930 events. 7575/16930 cut-off events. For 279534/279674 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 158654 event pairs, 967 based on Foata normal form. 116/16941 useless extension candidates. Maximal degree in co-relation 96483. Up to 5374 conditions per place. [2022-07-22 21:55:23,495 INFO L132 encePairwiseOnDemand]: 104/145 looper letters, 574 selfloop transitions, 832 changer transitions 109/1553 dead transitions. [2022-07-22 21:55:23,495 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 1553 transitions, 27300 flow [2022-07-22 21:55:23,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-07-22 21:55:23,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2022-07-22 21:55:23,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 5727 transitions. [2022-07-22 21:55:23,504 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.340487514863258 [2022-07-22 21:55:23,504 INFO L72 ComplementDD]: Start complementDD. Operand 116 states and 5727 transitions. [2022-07-22 21:55:23,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 5727 transitions. [2022-07-22 21:55:23,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:23,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 116 states and 5727 transitions. [2022-07-22 21:55:23,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 117 states, 116 states have (on average 49.37068965517241) internal successors, (5727), 116 states have internal predecessors, (5727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:23,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 117 states, 117 states have (on average 145.0) internal successors, (16965), 117 states have internal predecessors, (16965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:23,529 INFO L81 ComplementDD]: Finished complementDD. Result has 117 states, 117 states have (on average 145.0) internal successors, (16965), 117 states have internal predecessors, (16965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:23,529 INFO L186 Difference]: Start difference. First operand has 393 places, 629 transitions, 10738 flow. Second operand 116 states and 5727 transitions. [2022-07-22 21:55:23,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 1553 transitions, 27300 flow [2022-07-22 21:55:24,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 1553 transitions, 26719 flow, removed 33 selfloop flow, removed 32 redundant places. [2022-07-22 21:55:24,805 INFO L242 Difference]: Finished difference. Result has 520 places, 1096 transitions, 21413 flow [2022-07-22 21:55:24,805 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=10463, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=21413, PETRI_PLACES=520, PETRI_TRANSITIONS=1096} [2022-07-22 21:55:24,806 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 390 predicate places. [2022-07-22 21:55:24,806 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 1096 transitions, 21413 flow [2022-07-22 21:55:24,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 46.61052631578947) internal successors, (4428), 95 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:24,807 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:24,807 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-22 21:55:24,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 21:55:25,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-22 21:55:25,007 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:55:25,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:25,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1631453886, now seen corresponding path program 2 times [2022-07-22 21:55:25,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:25,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051834949] [2022-07-22 21:55:25,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:25,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:25,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:26,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:26,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051834949] [2022-07-22 21:55:26,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051834949] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:26,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465970398] [2022-07-22 21:55:26,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:55:26,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:26,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:26,411 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:55:26,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 21:55:26,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:55:26,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:55:26,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-22 21:55:26,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:28,083 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-22 21:55:28,083 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 24 treesize of output 10 [2022-07-22 21:55:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:28,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:55:29,784 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:55:29,784 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 40 treesize of output 40 [2022-07-22 21:55:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:31,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465970398] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:55:31,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:55:31,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 31, 31] total 89 [2022-07-22 21:55:31,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978791298] [2022-07-22 21:55:31,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:55:31,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-07-22 21:55:31,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:31,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-07-22 21:55:31,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=692, Invalid=7140, Unknown=0, NotChecked=0, Total=7832 [2022-07-22 21:55:31,710 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2022-07-22 21:55:31,713 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 1096 transitions, 21413 flow. Second operand has 89 states, 89 states have (on average 58.48314606741573) internal successors, (5205), 89 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:31,713 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:31,713 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2022-07-22 21:55:31,713 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:48,495 INFO L129 PetriNetUnfolder]: 8335/18192 cut-off events. [2022-07-22 21:55:48,495 INFO L130 PetriNetUnfolder]: For 443139/443359 co-relation queries the response was YES. [2022-07-22 21:55:48,697 INFO L84 FinitePrefix]: Finished finitePrefix Result has 134157 conditions, 18192 events. 8335/18192 cut-off events. For 443139/443359 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 170946 event pairs, 1966 based on Foata normal form. 133/18146 useless extension candidates. Maximal degree in co-relation 134025. Up to 9806 conditions per place. [2022-07-22 21:55:48,779 INFO L132 encePairwiseOnDemand]: 104/145 looper letters, 845 selfloop transitions, 829 changer transitions 20/1740 dead transitions. [2022-07-22 21:55:48,780 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 1740 transitions, 34516 flow [2022-07-22 21:55:48,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-22 21:55:48,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2022-07-22 21:55:48,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 5908 transitions. [2022-07-22 21:55:48,784 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.42442528735632185 [2022-07-22 21:55:48,784 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 5908 transitions. [2022-07-22 21:55:48,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 5908 transitions. [2022-07-22 21:55:48,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:48,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 5908 transitions. [2022-07-22 21:55:48,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 61.541666666666664) internal successors, (5908), 96 states have internal predecessors, (5908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:48,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 145.0) internal successors, (14065), 97 states have internal predecessors, (14065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:48,802 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 145.0) internal successors, (14065), 97 states have internal predecessors, (14065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:48,802 INFO L186 Difference]: Start difference. First operand has 520 places, 1096 transitions, 21413 flow. Second operand 96 states and 5908 transitions. [2022-07-22 21:55:48,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 1740 transitions, 34516 flow [2022-07-22 21:55:52,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 1740 transitions, 33931 flow, removed 209 selfloop flow, removed 46 redundant places. [2022-07-22 21:55:52,070 INFO L242 Difference]: Finished difference. Result has 570 places, 1371 transitions, 29332 flow [2022-07-22 21:55:52,071 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=21028, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1096, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=603, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=29332, PETRI_PLACES=570, PETRI_TRANSITIONS=1371} [2022-07-22 21:55:52,072 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 440 predicate places. [2022-07-22 21:55:52,072 INFO L495 AbstractCegarLoop]: Abstraction has has 570 places, 1371 transitions, 29332 flow [2022-07-22 21:55:52,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 58.48314606741573) internal successors, (5205), 89 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:52,073 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:52,073 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-22 21:55:52,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 21:55:52,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-22 21:55:52,273 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:55:52,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:52,274 INFO L85 PathProgramCache]: Analyzing trace with hash -981436956, now seen corresponding path program 3 times [2022-07-22 21:55:52,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:52,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14979730] [2022-07-22 21:55:52,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:52,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:53,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:53,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14979730] [2022-07-22 21:55:53,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14979730] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:53,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59784601] [2022-07-22 21:55:53,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:55:53,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:53,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:53,647 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:55:53,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 21:55:53,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 21:55:53,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:55:53,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-22 21:55:53,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:54,639 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 21:55:54,640 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 [2022-07-22 21:55:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:55:55,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:55:55,951 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:55:55,951 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 40 treesize of output 40 [2022-07-22 21:55:56,726 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:55:56,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59784601] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:55:56,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:55:56,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 22, 22] total 71 [2022-07-22 21:55:56,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173995553] [2022-07-22 21:55:56,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:55:56,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-22 21:55:56,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:56,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-22 21:55:56,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=4640, Unknown=0, NotChecked=0, Total=4970 [2022-07-22 21:55:56,731 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2022-07-22 21:55:56,733 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 570 places, 1371 transitions, 29332 flow. Second operand has 71 states, 71 states have (on average 58.971830985915496) internal successors, (4187), 71 states have internal predecessors, (4187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:56,733 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:56,733 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2022-07-22 21:55:56,733 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:08,653 INFO L129 PetriNetUnfolder]: 9641/21054 cut-off events. [2022-07-22 21:56:08,653 INFO L130 PetriNetUnfolder]: For 550778/550999 co-relation queries the response was YES. [2022-07-22 21:56:08,990 INFO L84 FinitePrefix]: Finished finitePrefix Result has 160971 conditions, 21054 events. 9641/21054 cut-off events. For 550778/550999 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 202132 event pairs, 3402 based on Foata normal form. 134/20991 useless extension candidates. Maximal degree in co-relation 160834. Up to 14227 conditions per place. [2022-07-22 21:56:09,089 INFO L132 encePairwiseOnDemand]: 106/145 looper letters, 1046 selfloop transitions, 960 changer transitions 11/2063 dead transitions. [2022-07-22 21:56:09,089 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 2063 transitions, 47324 flow [2022-07-22 21:56:09,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-22 21:56:09,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-07-22 21:56:09,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3821 transitions. [2022-07-22 21:56:09,094 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.425027808676307 [2022-07-22 21:56:09,094 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3821 transitions. [2022-07-22 21:56:09,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3821 transitions. [2022-07-22 21:56:09,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:09,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3821 transitions. [2022-07-22 21:56:09,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 61.62903225806452) internal successors, (3821), 62 states have internal predecessors, (3821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:09,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 145.0) internal successors, (9135), 63 states have internal predecessors, (9135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:09,110 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 145.0) internal successors, (9135), 63 states have internal predecessors, (9135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:09,110 INFO L186 Difference]: Start difference. First operand has 570 places, 1371 transitions, 29332 flow. Second operand 62 states and 3821 transitions. [2022-07-22 21:56:09,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 2063 transitions, 47324 flow [2022-07-22 21:56:15,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 2063 transitions, 46439 flow, removed 297 selfloop flow, removed 42 redundant places. [2022-07-22 21:56:15,409 INFO L242 Difference]: Finished difference. Result has 604 places, 1837 transitions, 44207 flow [2022-07-22 21:56:15,411 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=28763, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=544, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=44207, PETRI_PLACES=604, PETRI_TRANSITIONS=1837} [2022-07-22 21:56:15,416 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 474 predicate places. [2022-07-22 21:56:15,417 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 1837 transitions, 44207 flow [2022-07-22 21:56:15,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 58.971830985915496) internal successors, (4187), 71 states have internal predecessors, (4187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:15,417 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:15,418 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-22 21:56:15,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 21:56:15,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-22 21:56:15,628 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:56:15,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:15,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1094007968, now seen corresponding path program 4 times [2022-07-22 21:56:15,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:15,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860502298] [2022-07-22 21:56:15,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:15,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:17,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:17,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860502298] [2022-07-22 21:56:17,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860502298] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:56:17,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369074312] [2022-07-22 21:56:17,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:56:17,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:56:17,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:56:17,599 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:56:17,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 21:56:17,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:56:17,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:56:17,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-22 21:56:17,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:56:19,154 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 [2022-07-22 21:56:19,617 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:19,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:56:20,869 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:56:20,869 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 40 treesize of output 40 [2022-07-22 21:56:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:22,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369074312] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:56:22,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:56:22,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 31, 31] total 96 [2022-07-22 21:56:22,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960728846] [2022-07-22 21:56:22,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:56:22,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-07-22 21:56:22,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:22,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-07-22 21:56:22,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=657, Invalid=8463, Unknown=0, NotChecked=0, Total=9120 [2022-07-22 21:56:22,887 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 145 [2022-07-22 21:56:22,889 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 1837 transitions, 44207 flow. Second operand has 96 states, 96 states have (on average 49.552083333333336) internal successors, (4757), 96 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:22,889 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:22,889 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 145 [2022-07-22 21:56:22,889 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:31,610 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 21:56:49,388 INFO L129 PetriNetUnfolder]: 10762/23385 cut-off events. [2022-07-22 21:56:49,389 INFO L130 PetriNetUnfolder]: For 719088/719362 co-relation queries the response was YES. [2022-07-22 21:56:49,973 INFO L84 FinitePrefix]: Finished finitePrefix Result has 193212 conditions, 23385 events. 10762/23385 cut-off events. For 719088/719362 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 226756 event pairs, 2319 based on Foata normal form. 187/23363 useless extension candidates. Maximal degree in co-relation 193062. Up to 11359 conditions per place. [2022-07-22 21:56:50,097 INFO L132 encePairwiseOnDemand]: 103/145 looper letters, 1090 selfloop transitions, 1384 changer transitions 19/2534 dead transitions. [2022-07-22 21:56:50,098 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 684 places, 2534 transitions, 63572 flow [2022-07-22 21:56:50,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-07-22 21:56:50,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2022-07-22 21:56:50,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 4423 transitions. [2022-07-22 21:56:50,101 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.363136288998358 [2022-07-22 21:56:50,101 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 4423 transitions. [2022-07-22 21:56:50,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 4423 transitions. [2022-07-22 21:56:50,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:50,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 4423 transitions. [2022-07-22 21:56:50,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 52.654761904761905) internal successors, (4423), 84 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:50,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 145.0) internal successors, (12325), 85 states have internal predecessors, (12325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:50,117 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 145.0) internal successors, (12325), 85 states have internal predecessors, (12325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:50,117 INFO L186 Difference]: Start difference. First operand has 604 places, 1837 transitions, 44207 flow. Second operand 84 states and 4423 transitions. [2022-07-22 21:56:50,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 684 places, 2534 transitions, 63572 flow [2022-07-22 21:56:57,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 662 places, 2534 transitions, 63078 flow, removed 189 selfloop flow, removed 22 redundant places. [2022-07-22 21:56:57,544 INFO L242 Difference]: Finished difference. Result has 686 places, 2201 transitions, 58637 flow [2022-07-22 21:56:57,546 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=43790, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1038, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=58637, PETRI_PLACES=686, PETRI_TRANSITIONS=2201} [2022-07-22 21:56:57,547 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 556 predicate places. [2022-07-22 21:56:57,547 INFO L495 AbstractCegarLoop]: Abstraction has has 686 places, 2201 transitions, 58637 flow [2022-07-22 21:56:57,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 49.552083333333336) internal successors, (4757), 96 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:57,548 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:57,548 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-22 21:56:57,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 21:56:57,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:56:57,754 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:56:57,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:57,754 INFO L85 PathProgramCache]: Analyzing trace with hash -710578426, now seen corresponding path program 5 times [2022-07-22 21:56:57,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:57,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130155422] [2022-07-22 21:56:57,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:57,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:58,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:58,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130155422] [2022-07-22 21:56:58,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130155422] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:56:58,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851053884] [2022-07-22 21:56:58,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:56:58,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:56:58,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:56:58,997 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:56:58,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 21:56:59,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-22 21:56:59,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:56:59,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-22 21:56:59,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:57:00,662 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 21:57:00,662 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 [2022-07-22 21:57:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:01,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:57:02,115 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:57:02,116 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 46 treesize of output 46 [2022-07-22 21:57:04,273 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:04,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851053884] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:57:04,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:57:04,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 31, 30] total 87 [2022-07-22 21:57:04,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617425878] [2022-07-22 21:57:04,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:57:04,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-07-22 21:57:04,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:04,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-07-22 21:57:04,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=689, Invalid=6793, Unknown=0, NotChecked=0, Total=7482 [2022-07-22 21:57:04,278 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2022-07-22 21:57:04,280 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 686 places, 2201 transitions, 58637 flow. Second operand has 87 states, 87 states have (on average 58.50574712643678) internal successors, (5090), 87 states have internal predecessors, (5090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:04,280 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:04,280 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2022-07-22 21:57:04,280 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand