./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-2.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/unroll-2.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 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:58:59,673 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:58:59,679 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:58:59,702 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:58:59,711 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:58:59,712 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:58:59,716 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:58:59,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:58:59,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:58:59,721 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:58:59,722 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:58:59,724 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:58:59,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:58:59,728 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:58:59,729 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:58:59,731 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:58:59,732 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:58:59,734 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:58:59,735 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:58:59,737 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:58:59,740 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:58:59,741 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:58:59,742 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:58:59,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:58:59,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:58:59,745 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:58:59,746 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:58:59,747 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:58:59,747 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:58:59,748 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:58:59,749 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:58:59,749 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:58:59,750 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:58:59,751 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:58:59,751 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:58:59,753 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:58:59,753 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:58:59,753 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:58:59,753 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:58:59,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:58:59,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:58:59,756 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:58:59,757 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:58:59,784 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:58:59,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:58:59,784 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:58:59,785 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:58:59,785 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:58:59,786 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:58:59,786 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:58:59,786 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:58:59,786 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:58:59,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:58:59,787 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:58:59,787 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:58:59,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:58:59,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:58:59,788 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:58:59,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:58:59,788 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:58:59,788 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:58:59,788 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:58:59,789 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:58:59,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:58:59,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:58:59,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:58:59,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:58:59,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:58:59,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:58:59,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:58:59,791 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:58:59,791 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:58:59,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:58:59,791 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:58:59,791 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:58:59,791 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:58:59,792 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf [2022-07-22 21:58:59,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:59:00,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:59:00,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:59:00,013 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:59:00,013 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:59:00,014 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-2.wvr.c [2022-07-22 21:59:00,072 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/683657c7d/3e844dce27814b8cae28a1f74608b701/FLAGfecc82a40 [2022-07-22 21:59:00,465 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:59:00,465 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-2.wvr.c [2022-07-22 21:59:00,471 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/683657c7d/3e844dce27814b8cae28a1f74608b701/FLAGfecc82a40 [2022-07-22 21:59:00,484 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/683657c7d/3e844dce27814b8cae28a1f74608b701 [2022-07-22 21:59:00,486 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:59:00,487 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:59:00,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:59:00,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:59:00,492 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:59:00,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:59:00" (1/1) ... [2022-07-22 21:59:00,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37ba1fff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:59:00, skipping insertion in model container [2022-07-22 21:59:00,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:59:00" (1/1) ... [2022-07-22 21:59:00,499 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:59:00,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:59:00,661 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/unroll-2.wvr.c[2428,2441] [2022-07-22 21:59:00,666 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:59:00,671 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:59:00,684 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/unroll-2.wvr.c[2428,2441] [2022-07-22 21:59:00,689 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:59:00,697 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:59:00,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:59:00 WrapperNode [2022-07-22 21:59:00,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:59:00,699 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:59:00,699 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:59:00,699 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:59:00,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:59:00" (1/1) ... [2022-07-22 21:59:00,711 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:59:00" (1/1) ... [2022-07-22 21:59:00,728 INFO L137 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 134 [2022-07-22 21:59:00,728 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:59:00,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:59:00,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:59:00,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:59:00,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:59:00" (1/1) ... [2022-07-22 21:59:00,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:59:00" (1/1) ... [2022-07-22 21:59:00,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:59:00" (1/1) ... [2022-07-22 21:59:00,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:59:00" (1/1) ... [2022-07-22 21:59:00,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:59:00" (1/1) ... [2022-07-22 21:59:00,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:59:00" (1/1) ... [2022-07-22 21:59:00,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:59:00" (1/1) ... [2022-07-22 21:59:00,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:59:00,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:59:00,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:59:00,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:59:00,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:59:00" (1/1) ... [2022-07-22 21:59:00,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:59:00,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:59:00,780 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 21:59:00,786 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 21:59:00,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:59:00,819 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:59:00,819 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:59:00,819 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:59:00,820 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:59:00,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:59:00,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:59:00,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:59:00,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 21:59:00,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:59:00,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:59:00,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:59:00,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:59:00,822 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 21:59:00,906 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:59:00,907 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:59:01,211 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:59:01,218 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:59:01,218 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 21:59:01,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:59:01 BoogieIcfgContainer [2022-07-22 21:59:01,220 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:59:01,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:59:01,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:59:01,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:59:01,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:59:00" (1/3) ... [2022-07-22 21:59:01,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@106dd6e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:59:01, skipping insertion in model container [2022-07-22 21:59:01,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:59:00" (2/3) ... [2022-07-22 21:59:01,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@106dd6e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:59:01, skipping insertion in model container [2022-07-22 21:59:01,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:59:01" (3/3) ... [2022-07-22 21:59:01,229 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2022-07-22 21:59:01,233 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:59:01,239 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:59:01,239 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:59:01,239 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:59:01,318 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:59:01,347 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 164 places, 171 transitions, 358 flow [2022-07-22 21:59:01,420 INFO L129 PetriNetUnfolder]: 14/169 cut-off events. [2022-07-22 21:59:01,424 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:59:01,428 INFO L84 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 169 events. 14/169 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 156 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2022-07-22 21:59:01,428 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 171 transitions, 358 flow [2022-07-22 21:59:01,436 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 160 transitions, 332 flow [2022-07-22 21:59:01,453 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:59:01,458 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@263a9006, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5b88aadc [2022-07-22 21:59:01,459 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-22 21:59:01,487 INFO L129 PetriNetUnfolder]: 13/156 cut-off events. [2022-07-22 21:59:01,487 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:59:01,488 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:59:01,488 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] [2022-07-22 21:59:01,489 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 21:59:01,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:59:01,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1481437362, now seen corresponding path program 1 times [2022-07-22 21:59:01,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:59:01,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736163490] [2022-07-22 21:59:01,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:59:01,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:59:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:01,694 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 21:59:01,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:59:01,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736163490] [2022-07-22 21:59:01,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736163490] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:59:01,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:59:01,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:59:01,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422382163] [2022-07-22 21:59:01,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:59:01,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:59:01,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:59:01,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:59:01,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:59:01,732 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 171 [2022-07-22 21:59:01,737 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 160 transitions, 332 flow. Second operand has 2 states, 2 states have (on average 158.0) internal successors, (316), 2 states have internal predecessors, (316), 0 states have call successors, (0), 0 states 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 21:59:01,737 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:59:01,737 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 171 [2022-07-22 21:59:01,738 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:59:01,822 INFO L129 PetriNetUnfolder]: 3/149 cut-off events. [2022-07-22 21:59:01,826 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-22 21:59:01,827 INFO L84 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 149 events. 3/149 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 142 event pairs, 0 based on Foata normal form. 14/152 useless extension candidates. Maximal degree in co-relation 104. Up to 5 conditions per place. [2022-07-22 21:59:01,829 INFO L132 encePairwiseOnDemand]: 160/171 looper letters, 4 selfloop transitions, 0 changer transitions 5/149 dead transitions. [2022-07-22 21:59:01,829 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 149 transitions, 318 flow [2022-07-22 21:59:01,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:59:01,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:59:01,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 325 transitions. [2022-07-22 21:59:01,843 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9502923976608187 [2022-07-22 21:59:01,844 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 325 transitions. [2022-07-22 21:59:01,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 325 transitions. [2022-07-22 21:59:01,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:59:01,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 325 transitions. [2022-07-22 21:59:01,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 162.5) internal successors, (325), 2 states have internal predecessors, (325), 0 states have call successors, (0), 0 states 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 21:59:01,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states 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 21:59:01,862 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states 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 21:59:01,863 INFO L186 Difference]: Start difference. First operand has 153 places, 160 transitions, 332 flow. Second operand 2 states and 325 transitions. [2022-07-22 21:59:01,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 149 transitions, 318 flow [2022-07-22 21:59:01,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 149 transitions, 310 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:59:01,870 INFO L242 Difference]: Finished difference. Result has 150 places, 144 transitions, 292 flow [2022-07-22 21:59:01,872 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=292, PETRI_PLACES=150, PETRI_TRANSITIONS=144} [2022-07-22 21:59:01,877 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, -3 predicate places. [2022-07-22 21:59:01,877 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 144 transitions, 292 flow [2022-07-22 21:59:01,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 158.0) internal successors, (316), 2 states have internal predecessors, (316), 0 states have call successors, (0), 0 states 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 21:59:01,877 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:59:01,878 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] [2022-07-22 21:59:01,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:59:01,878 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 21:59:01,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:59:01,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1667863150, now seen corresponding path program 1 times [2022-07-22 21:59:01,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:59:01,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135509562] [2022-07-22 21:59:01,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:59:01,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:59:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:02,141 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 21:59:02,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:59:02,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135509562] [2022-07-22 21:59:02,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135509562] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:59:02,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:59:02,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:59:02,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581674689] [2022-07-22 21:59:02,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:59:02,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:59:02,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:59:02,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:59:02,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:59:02,148 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 171 [2022-07-22 21:59:02,149 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 144 transitions, 292 flow. Second operand has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 0 states have call successors, (0), 0 states 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 21:59:02,149 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:59:02,149 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 171 [2022-07-22 21:59:02,149 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:59:02,271 INFO L129 PetriNetUnfolder]: 16/244 cut-off events. [2022-07-22 21:59:02,271 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-22 21:59:02,272 INFO L84 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 244 events. 16/244 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 538 event pairs, 5 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 308. Up to 49 conditions per place. [2022-07-22 21:59:02,272 INFO L132 encePairwiseOnDemand]: 163/171 looper letters, 36 selfloop transitions, 7 changer transitions 0/148 dead transitions. [2022-07-22 21:59:02,272 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 148 transitions, 386 flow [2022-07-22 21:59:02,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:59:02,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:59:02,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 964 transitions. [2022-07-22 21:59:02,275 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7046783625730995 [2022-07-22 21:59:02,275 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 964 transitions. [2022-07-22 21:59:02,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 964 transitions. [2022-07-22 21:59:02,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:59:02,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 964 transitions. [2022-07-22 21:59:02,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.5) internal successors, (964), 8 states have internal predecessors, (964), 0 states have call successors, (0), 0 states 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 21:59:02,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 171.0) internal successors, (1539), 9 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states 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 21:59:02,280 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 171.0) internal successors, (1539), 9 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states 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 21:59:02,280 INFO L186 Difference]: Start difference. First operand has 150 places, 144 transitions, 292 flow. Second operand 8 states and 964 transitions. [2022-07-22 21:59:02,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 148 transitions, 386 flow [2022-07-22 21:59:02,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 148 transitions, 386 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:59:02,283 INFO L242 Difference]: Finished difference. Result has 153 places, 145 transitions, 314 flow [2022-07-22 21:59:02,283 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=314, PETRI_PLACES=153, PETRI_TRANSITIONS=145} [2022-07-22 21:59:02,284 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 0 predicate places. [2022-07-22 21:59:02,284 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 145 transitions, 314 flow [2022-07-22 21:59:02,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 0 states have call successors, (0), 0 states 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 21:59:02,285 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:59:02,285 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] [2022-07-22 21:59:02,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:59:02,285 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 21:59:02,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:59:02,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1651907158, now seen corresponding path program 1 times [2022-07-22 21:59:02,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:59:02,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352108152] [2022-07-22 21:59:02,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:59:02,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:59:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:02,447 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 21:59:02,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:59:02,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352108152] [2022-07-22 21:59:02,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352108152] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:59:02,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:59:02,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:59:02,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752652256] [2022-07-22 21:59:02,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:59:02,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:59:02,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:59:02,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:59:02,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:59:02,449 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 171 [2022-07-22 21:59:02,450 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 145 transitions, 314 flow. Second operand has 6 states, 6 states have (on average 123.33333333333333) internal successors, (740), 6 states have internal predecessors, (740), 0 states have call successors, (0), 0 states 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 21:59:02,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:59:02,450 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 171 [2022-07-22 21:59:02,450 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:59:02,579 INFO L129 PetriNetUnfolder]: 73/531 cut-off events. [2022-07-22 21:59:02,579 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-07-22 21:59:02,581 INFO L84 FinitePrefix]: Finished finitePrefix Result has 727 conditions, 531 events. 73/531 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2573 event pairs, 20 based on Foata normal form. 1/491 useless extension candidates. Maximal degree in co-relation 722. Up to 79 conditions per place. [2022-07-22 21:59:02,583 INFO L132 encePairwiseOnDemand]: 164/171 looper letters, 53 selfloop transitions, 5 changer transitions 4/172 dead transitions. [2022-07-22 21:59:02,583 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 172 transitions, 497 flow [2022-07-22 21:59:02,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:59:02,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:59:02,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 777 transitions. [2022-07-22 21:59:02,585 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7573099415204678 [2022-07-22 21:59:02,585 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 777 transitions. [2022-07-22 21:59:02,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 777 transitions. [2022-07-22 21:59:02,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:59:02,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 777 transitions. [2022-07-22 21:59:02,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 129.5) internal successors, (777), 6 states have internal predecessors, (777), 0 states have call successors, (0), 0 states 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 21:59:02,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states 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 21:59:02,589 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states 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 21:59:02,590 INFO L186 Difference]: Start difference. First operand has 153 places, 145 transitions, 314 flow. Second operand 6 states and 777 transitions. [2022-07-22 21:59:02,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 172 transitions, 497 flow [2022-07-22 21:59:02,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 172 transitions, 485 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-22 21:59:02,593 INFO L242 Difference]: Finished difference. Result has 155 places, 148 transitions, 331 flow [2022-07-22 21:59:02,593 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=155, PETRI_TRANSITIONS=148} [2022-07-22 21:59:02,594 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 2 predicate places. [2022-07-22 21:59:02,594 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 148 transitions, 331 flow [2022-07-22 21:59:02,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 123.33333333333333) internal successors, (740), 6 states have internal predecessors, (740), 0 states have call successors, (0), 0 states 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 21:59:02,595 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:59:02,595 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] [2022-07-22 21:59:02,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:59:02,595 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 21:59:02,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:59:02,596 INFO L85 PathProgramCache]: Analyzing trace with hash 993199323, now seen corresponding path program 1 times [2022-07-22 21:59:02,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:59:02,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643854949] [2022-07-22 21:59:02,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:59:02,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:59:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:59:02,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:59:02,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643854949] [2022-07-22 21:59:02,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643854949] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:59:02,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214610796] [2022-07-22 21:59:02,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:59:02,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:59:02,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:59:02,725 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 21:59:02,726 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 21:59:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:02,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:59:02,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:59:02,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:59:02,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:59:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:59:02,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214610796] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:59:02,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:59:02,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-07-22 21:59:02,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204658954] [2022-07-22 21:59:02,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:59:02,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:59:02,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:59:02,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:59:02,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:59:02,971 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 171 [2022-07-22 21:59:02,972 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 148 transitions, 331 flow. Second operand has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states 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 21:59:02,972 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:59:02,972 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 171 [2022-07-22 21:59:02,972 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:59:03,042 INFO L129 PetriNetUnfolder]: 80/582 cut-off events. [2022-07-22 21:59:03,042 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-07-22 21:59:03,044 INFO L84 FinitePrefix]: Finished finitePrefix Result has 785 conditions, 582 events. 80/582 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2941 event pairs, 13 based on Foata normal form. 0/511 useless extension candidates. Maximal degree in co-relation 777. Up to 79 conditions per place. [2022-07-22 21:59:03,045 INFO L132 encePairwiseOnDemand]: 166/171 looper letters, 22 selfloop transitions, 5 changer transitions 1/160 dead transitions. [2022-07-22 21:59:03,045 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 160 transitions, 415 flow [2022-07-22 21:59:03,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:59:03,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:59:03,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 601 transitions. [2022-07-22 21:59:03,047 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8786549707602339 [2022-07-22 21:59:03,047 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 601 transitions. [2022-07-22 21:59:03,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 601 transitions. [2022-07-22 21:59:03,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:59:03,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 601 transitions. [2022-07-22 21:59:03,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states 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 21:59:03,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:03,050 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:03,050 INFO L186 Difference]: Start difference. First operand has 155 places, 148 transitions, 331 flow. Second operand 4 states and 601 transitions. [2022-07-22 21:59:03,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 160 transitions, 415 flow [2022-07-22 21:59:03,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 160 transitions, 411 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-22 21:59:03,053 INFO L242 Difference]: Finished difference. Result has 157 places, 152 transitions, 363 flow [2022-07-22 21:59:03,054 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=363, PETRI_PLACES=157, PETRI_TRANSITIONS=152} [2022-07-22 21:59:03,054 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 4 predicate places. [2022-07-22 21:59:03,054 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 152 transitions, 363 flow [2022-07-22 21:59:03,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states 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 21:59:03,055 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:59:03,055 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] [2022-07-22 21:59:03,074 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 21:59:03,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:59:03,272 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 21:59:03,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:59:03,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1049045293, now seen corresponding path program 2 times [2022-07-22 21:59:03,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:59:03,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370243279] [2022-07-22 21:59:03,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:59:03,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:59:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:59:03,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:59:03,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370243279] [2022-07-22 21:59:03,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370243279] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:59:03,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:59:03,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:59:03,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370470894] [2022-07-22 21:59:03,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:59:03,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:59:03,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:59:03,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:59:03,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:59:03,365 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 171 [2022-07-22 21:59:03,366 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 152 transitions, 363 flow. Second operand has 5 states, 5 states have (on average 142.8) internal successors, (714), 5 states have internal predecessors, (714), 0 states have call successors, (0), 0 states 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 21:59:03,366 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:59:03,366 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 171 [2022-07-22 21:59:03,366 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:59:03,513 INFO L129 PetriNetUnfolder]: 131/795 cut-off events. [2022-07-22 21:59:03,514 INFO L130 PetriNetUnfolder]: For 175/175 co-relation queries the response was YES. [2022-07-22 21:59:03,516 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1261 conditions, 795 events. 131/795 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4541 event pairs, 34 based on Foata normal form. 7/755 useless extension candidates. Maximal degree in co-relation 1252. Up to 123 conditions per place. [2022-07-22 21:59:03,520 INFO L132 encePairwiseOnDemand]: 163/171 looper letters, 49 selfloop transitions, 11 changer transitions 5/194 dead transitions. [2022-07-22 21:59:03,520 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 194 transitions, 641 flow [2022-07-22 21:59:03,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:59:03,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:59:03,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 899 transitions. [2022-07-22 21:59:03,523 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8762183235867447 [2022-07-22 21:59:03,523 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 899 transitions. [2022-07-22 21:59:03,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 899 transitions. [2022-07-22 21:59:03,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:59:03,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 899 transitions. [2022-07-22 21:59:03,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.83333333333334) internal successors, (899), 6 states have internal predecessors, (899), 0 states have call successors, (0), 0 states 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 21:59:03,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states 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 21:59:03,527 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states 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 21:59:03,527 INFO L186 Difference]: Start difference. First operand has 157 places, 152 transitions, 363 flow. Second operand 6 states and 899 transitions. [2022-07-22 21:59:03,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 194 transitions, 641 flow [2022-07-22 21:59:03,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 194 transitions, 641 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:59:03,532 INFO L242 Difference]: Finished difference. Result has 166 places, 162 transitions, 463 flow [2022-07-22 21:59:03,532 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=463, PETRI_PLACES=166, PETRI_TRANSITIONS=162} [2022-07-22 21:59:03,534 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 13 predicate places. [2022-07-22 21:59:03,534 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 162 transitions, 463 flow [2022-07-22 21:59:03,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.8) internal successors, (714), 5 states have internal predecessors, (714), 0 states have call successors, (0), 0 states 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 21:59:03,535 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:59:03,535 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] [2022-07-22 21:59:03,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:59:03,535 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 21:59:03,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:59:03,537 INFO L85 PathProgramCache]: Analyzing trace with hash 431742831, now seen corresponding path program 3 times [2022-07-22 21:59:03,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:59:03,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508942141] [2022-07-22 21:59:03,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:59:03,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:59:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:59:03,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:59:03,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508942141] [2022-07-22 21:59:03,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508942141] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:59:03,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797557631] [2022-07-22 21:59:03,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:59:03,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:59:03,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:59:03,693 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 21:59:03,694 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 21:59:03,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 21:59:03,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:59:03,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:59:03,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:59:03,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:59:03,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:59:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:59:04,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797557631] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:59:04,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:59:04,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-07-22 21:59:04,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185358930] [2022-07-22 21:59:04,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:59:04,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 21:59:04,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:59:04,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 21:59:04,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-07-22 21:59:04,015 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 171 [2022-07-22 21:59:04,016 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 162 transitions, 463 flow. Second operand has 9 states, 9 states have (on average 142.66666666666666) internal successors, (1284), 9 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states 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 21:59:04,016 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:59:04,016 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 171 [2022-07-22 21:59:04,016 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:59:04,174 INFO L129 PetriNetUnfolder]: 146/920 cut-off events. [2022-07-22 21:59:04,174 INFO L130 PetriNetUnfolder]: For 601/601 co-relation queries the response was YES. [2022-07-22 21:59:04,176 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1709 conditions, 920 events. 146/920 cut-off events. For 601/601 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 5292 event pairs, 41 based on Foata normal form. 11/875 useless extension candidates. Maximal degree in co-relation 1695. Up to 144 conditions per place. [2022-07-22 21:59:04,178 INFO L132 encePairwiseOnDemand]: 163/171 looper letters, 49 selfloop transitions, 19 changer transitions 6/203 dead transitions. [2022-07-22 21:59:04,179 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 203 transitions, 805 flow [2022-07-22 21:59:04,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:59:04,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:59:04,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1039 transitions. [2022-07-22 21:59:04,181 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8680033416875522 [2022-07-22 21:59:04,181 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1039 transitions. [2022-07-22 21:59:04,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1039 transitions. [2022-07-22 21:59:04,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:59:04,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1039 transitions. [2022-07-22 21:59:04,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 148.42857142857142) internal successors, (1039), 7 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states 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 21:59:04,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states 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 21:59:04,185 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states 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 21:59:04,185 INFO L186 Difference]: Start difference. First operand has 166 places, 162 transitions, 463 flow. Second operand 7 states and 1039 transitions. [2022-07-22 21:59:04,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 203 transitions, 805 flow [2022-07-22 21:59:04,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 203 transitions, 805 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:59:04,190 INFO L242 Difference]: Finished difference. Result has 176 places, 171 transitions, 618 flow [2022-07-22 21:59:04,190 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=618, PETRI_PLACES=176, PETRI_TRANSITIONS=171} [2022-07-22 21:59:04,190 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 23 predicate places. [2022-07-22 21:59:04,191 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 171 transitions, 618 flow [2022-07-22 21:59:04,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 142.66666666666666) internal successors, (1284), 9 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states 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 21:59:04,191 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:59:04,191 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] [2022-07-22 21:59:04,231 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 21:59:04,411 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,SelfDestructingSolverStorable5 [2022-07-22 21:59:04,412 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 21:59:04,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:59:04,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1255643103, now seen corresponding path program 4 times [2022-07-22 21:59:04,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:59:04,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300821820] [2022-07-22 21:59:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:59:04,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:59:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:59:04,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:59:04,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300821820] [2022-07-22 21:59:04,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300821820] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:59:04,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:59:04,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:59:04,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133591193] [2022-07-22 21:59:04,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:59:04,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:59:04,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:59:04,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:59:04,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:59:04,510 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 171 [2022-07-22 21:59:04,511 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 171 transitions, 618 flow. Second operand has 5 states, 5 states have (on average 142.8) internal successors, (714), 5 states have internal predecessors, (714), 0 states have call successors, (0), 0 states 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 21:59:04,511 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:59:04,511 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 171 [2022-07-22 21:59:04,511 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:59:04,663 INFO L129 PetriNetUnfolder]: 144/876 cut-off events. [2022-07-22 21:59:04,664 INFO L130 PetriNetUnfolder]: For 1298/1298 co-relation queries the response was YES. [2022-07-22 21:59:04,666 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1877 conditions, 876 events. 144/876 cut-off events. For 1298/1298 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4898 event pairs, 59 based on Foata normal form. 2/823 useless extension candidates. Maximal degree in co-relation 1859. Up to 187 conditions per place. [2022-07-22 21:59:04,669 INFO L132 encePairwiseOnDemand]: 164/171 looper letters, 38 selfloop transitions, 10 changer transitions 9/186 dead transitions. [2022-07-22 21:59:04,669 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 186 transitions, 807 flow [2022-07-22 21:59:04,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:59:04,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:59:04,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 878 transitions. [2022-07-22 21:59:04,672 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8557504873294347 [2022-07-22 21:59:04,672 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 878 transitions. [2022-07-22 21:59:04,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 878 transitions. [2022-07-22 21:59:04,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:59:04,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 878 transitions. [2022-07-22 21:59:04,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 146.33333333333334) internal successors, (878), 6 states have internal predecessors, (878), 0 states have call successors, (0), 0 states 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 21:59:04,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states 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 21:59:04,700 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states 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 21:59:04,700 INFO L186 Difference]: Start difference. First operand has 176 places, 171 transitions, 618 flow. Second operand 6 states and 878 transitions. [2022-07-22 21:59:04,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 186 transitions, 807 flow [2022-07-22 21:59:04,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 186 transitions, 791 flow, removed 8 selfloop flow, removed 0 redundant places. [2022-07-22 21:59:04,708 INFO L242 Difference]: Finished difference. Result has 184 places, 171 transitions, 638 flow [2022-07-22 21:59:04,709 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=638, PETRI_PLACES=184, PETRI_TRANSITIONS=171} [2022-07-22 21:59:04,709 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 31 predicate places. [2022-07-22 21:59:04,709 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 171 transitions, 638 flow [2022-07-22 21:59:04,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.8) internal successors, (714), 5 states have internal predecessors, (714), 0 states have call successors, (0), 0 states 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 21:59:04,710 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:59:04,710 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:59:04,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:59:04,711 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 21:59:04,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:59:04,711 INFO L85 PathProgramCache]: Analyzing trace with hash 2007351072, now seen corresponding path program 1 times [2022-07-22 21:59:04,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:59:04,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434999311] [2022-07-22 21:59:04,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:59:04,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:59:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:59:04,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:59:04,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434999311] [2022-07-22 21:59:04,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434999311] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:59:04,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:59:04,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:59:04,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592687170] [2022-07-22 21:59:04,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:59:04,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:59:04,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:59:04,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:59:04,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:59:04,808 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 171 [2022-07-22 21:59:04,808 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 171 transitions, 638 flow. Second operand has 6 states, 6 states have (on average 142.66666666666666) internal successors, (856), 6 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:04,808 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:59:04,808 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 171 [2022-07-22 21:59:04,809 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:59:04,979 INFO L129 PetriNetUnfolder]: 168/1041 cut-off events. [2022-07-22 21:59:04,979 INFO L130 PetriNetUnfolder]: For 1574/1574 co-relation queries the response was YES. [2022-07-22 21:59:04,982 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2199 conditions, 1041 events. 168/1041 cut-off events. For 1574/1574 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 6315 event pairs, 44 based on Foata normal form. 6/982 useless extension candidates. Maximal degree in co-relation 2177. Up to 175 conditions per place. [2022-07-22 21:59:04,985 INFO L132 encePairwiseOnDemand]: 164/171 looper letters, 46 selfloop transitions, 18 changer transitions 5/198 dead transitions. [2022-07-22 21:59:04,985 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 198 transitions, 922 flow [2022-07-22 21:59:04,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:59:04,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:59:04,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1034 transitions. [2022-07-22 21:59:04,987 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8638262322472848 [2022-07-22 21:59:04,987 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1034 transitions. [2022-07-22 21:59:04,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1034 transitions. [2022-07-22 21:59:04,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:59:04,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1034 transitions. [2022-07-22 21:59:04,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 147.71428571428572) internal successors, (1034), 7 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states 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 21:59:04,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states 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 21:59:04,992 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states 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 21:59:04,993 INFO L186 Difference]: Start difference. First operand has 184 places, 171 transitions, 638 flow. Second operand 7 states and 1034 transitions. [2022-07-22 21:59:04,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 198 transitions, 922 flow [2022-07-22 21:59:04,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 198 transitions, 888 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-07-22 21:59:05,002 INFO L242 Difference]: Finished difference. Result has 186 places, 175 transitions, 703 flow [2022-07-22 21:59:05,003 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=703, PETRI_PLACES=186, PETRI_TRANSITIONS=175} [2022-07-22 21:59:05,004 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 33 predicate places. [2022-07-22 21:59:05,004 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 175 transitions, 703 flow [2022-07-22 21:59:05,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 142.66666666666666) internal successors, (856), 6 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:05,005 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:59:05,005 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:59:05,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 21:59:05,005 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 21:59:05,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:59:05,005 INFO L85 PathProgramCache]: Analyzing trace with hash 301519184, now seen corresponding path program 2 times [2022-07-22 21:59:05,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:59:05,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485714069] [2022-07-22 21:59:05,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:59:05,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:59:05,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:05,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:59:05,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:59:05,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485714069] [2022-07-22 21:59:05,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485714069] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:59:05,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:59:05,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:59:05,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212658959] [2022-07-22 21:59:05,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:59:05,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:59:05,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:59:05,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:59:05,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:59:05,107 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 171 [2022-07-22 21:59:05,108 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 175 transitions, 703 flow. Second operand has 6 states, 6 states have (on average 142.66666666666666) internal successors, (856), 6 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:05,108 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:59:05,108 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 171 [2022-07-22 21:59:05,108 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:59:05,227 INFO L129 PetriNetUnfolder]: 161/974 cut-off events. [2022-07-22 21:59:05,227 INFO L130 PetriNetUnfolder]: For 1694/1694 co-relation queries the response was YES. [2022-07-22 21:59:05,230 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2126 conditions, 974 events. 161/974 cut-off events. For 1694/1694 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5532 event pairs, 44 based on Foata normal form. 8/921 useless extension candidates. Maximal degree in co-relation 2103. Up to 168 conditions per place. [2022-07-22 21:59:05,233 INFO L132 encePairwiseOnDemand]: 164/171 looper letters, 49 selfloop transitions, 19 changer transitions 4/201 dead transitions. [2022-07-22 21:59:05,233 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 201 transitions, 994 flow [2022-07-22 21:59:05,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:59:05,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:59:05,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 893 transitions. [2022-07-22 21:59:05,235 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8703703703703703 [2022-07-22 21:59:05,235 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 893 transitions. [2022-07-22 21:59:05,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 893 transitions. [2022-07-22 21:59:05,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:59:05,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 893 transitions. [2022-07-22 21:59:05,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 148.83333333333334) internal successors, (893), 6 states have internal predecessors, (893), 0 states have call successors, (0), 0 states 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 21:59:05,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states 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 21:59:05,239 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states 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 21:59:05,239 INFO L186 Difference]: Start difference. First operand has 186 places, 175 transitions, 703 flow. Second operand 6 states and 893 transitions. [2022-07-22 21:59:05,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 201 transitions, 994 flow [2022-07-22 21:59:05,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 201 transitions, 949 flow, removed 10 selfloop flow, removed 2 redundant places. [2022-07-22 21:59:05,246 INFO L242 Difference]: Finished difference. Result has 191 places, 175 transitions, 724 flow [2022-07-22 21:59:05,246 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=724, PETRI_PLACES=191, PETRI_TRANSITIONS=175} [2022-07-22 21:59:05,247 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 38 predicate places. [2022-07-22 21:59:05,247 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 175 transitions, 724 flow [2022-07-22 21:59:05,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 142.66666666666666) internal successors, (856), 6 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:05,247 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:59:05,247 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:59:05,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 21:59:05,248 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 21:59:05,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:59:05,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1718782997, now seen corresponding path program 1 times [2022-07-22 21:59:05,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:59:05,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142837759] [2022-07-22 21:59:05,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:59:05,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:59:05,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:05,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:59:05,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:59:05,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142837759] [2022-07-22 21:59:05,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142837759] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:59:05,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52819499] [2022-07-22 21:59:05,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:59:05,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:59:05,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:59:05,380 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 21:59:05,381 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 21:59:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:05,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-22 21:59:05,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:59:05,895 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-07-22 21:59:05,896 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 19 treesize of output 10 [2022-07-22 21:59:05,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:05,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:59:06,262 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-22 21:59:06,262 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 19 treesize of output 11 [2022-07-22 21:59:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:06,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52819499] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:59:06,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:59:06,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 18, 18] total 33 [2022-07-22 21:59:06,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618902114] [2022-07-22 21:59:06,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:59:06,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 21:59:06,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:59:06,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 21:59:06,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 21:59:06,812 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 171 [2022-07-22 21:59:06,814 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 175 transitions, 724 flow. Second operand has 33 states, 33 states have (on average 83.81818181818181) internal successors, (2766), 33 states have internal predecessors, (2766), 0 states have call successors, (0), 0 states 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 21:59:06,814 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:59:06,814 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 171 [2022-07-22 21:59:06,814 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:59:15,477 INFO L129 PetriNetUnfolder]: 7192/15720 cut-off events. [2022-07-22 21:59:15,477 INFO L130 PetriNetUnfolder]: For 19270/19522 co-relation queries the response was YES. [2022-07-22 21:59:15,546 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37935 conditions, 15720 events. 7192/15720 cut-off events. For 19270/19522 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 137897 event pairs, 321 based on Foata normal form. 439/15299 useless extension candidates. Maximal degree in co-relation 37911. Up to 2422 conditions per place. [2022-07-22 21:59:15,596 INFO L132 encePairwiseOnDemand]: 132/171 looper letters, 694 selfloop transitions, 335 changer transitions 193/1297 dead transitions. [2022-07-22 21:59:15,596 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 1297 transitions, 7198 flow [2022-07-22 21:59:15,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-07-22 21:59:15,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2022-07-22 21:59:15,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 12402 transitions. [2022-07-22 21:59:15,613 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5036549707602339 [2022-07-22 21:59:15,614 INFO L72 ComplementDD]: Start complementDD. Operand 144 states and 12402 transitions. [2022-07-22 21:59:15,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 144 states and 12402 transitions. [2022-07-22 21:59:15,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:59:15,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 144 states and 12402 transitions. [2022-07-22 21:59:15,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 145 states, 144 states have (on average 86.125) internal successors, (12402), 144 states have internal predecessors, (12402), 0 states have call successors, (0), 0 states 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 21:59:15,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 145 states, 145 states have (on average 171.0) internal successors, (24795), 145 states have internal predecessors, (24795), 0 states have call successors, (0), 0 states 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 21:59:15,680 INFO L81 ComplementDD]: Finished complementDD. Result has 145 states, 145 states have (on average 171.0) internal successors, (24795), 145 states have internal predecessors, (24795), 0 states have call successors, (0), 0 states 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 21:59:15,680 INFO L186 Difference]: Start difference. First operand has 191 places, 175 transitions, 724 flow. Second operand 144 states and 12402 transitions. [2022-07-22 21:59:15,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 1297 transitions, 7198 flow [2022-07-22 21:59:15,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 1297 transitions, 7014 flow, removed 17 selfloop flow, removed 5 redundant places. [2022-07-22 21:59:15,717 INFO L242 Difference]: Finished difference. Result has 428 places, 500 transitions, 3635 flow [2022-07-22 21:59:15,718 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=144, PETRI_FLOW=3635, PETRI_PLACES=428, PETRI_TRANSITIONS=500} [2022-07-22 21:59:15,719 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 275 predicate places. [2022-07-22 21:59:15,719 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 500 transitions, 3635 flow [2022-07-22 21:59:15,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 83.81818181818181) internal successors, (2766), 33 states have internal predecessors, (2766), 0 states have call successors, (0), 0 states 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 21:59:15,720 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:59:15,720 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:59:15,739 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 21:59:15,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:59:15,936 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 21:59:15,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:59:15,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1025215518, now seen corresponding path program 2 times [2022-07-22 21:59:15,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:59:15,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617230524] [2022-07-22 21:59:15,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:59:15,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:59:15,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:16,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:59:16,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617230524] [2022-07-22 21:59:16,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617230524] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:59:16,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463168419] [2022-07-22 21:59:16,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:59:16,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:59:16,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:59:16,436 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 21:59:16,467 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 21:59:16,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:59:16,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:59:16,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-22 21:59:16,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:59:16,537 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 21:59:16,563 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-22 21:59:16,564 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-22 21:59:16,804 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:59:16,805 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 15 treesize of output 15 [2022-07-22 21:59:16,909 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 21:59:17,159 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 21:59:17,206 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 21:59:17,913 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 21:59:17,913 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 21:59:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:59:17,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:59:19,737 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:59:19,738 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 55 treesize of output 44 [2022-07-22 21:59:19,748 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-22 21:59:19,749 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 198 treesize of output 173 [2022-07-22 21:59:19,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 21:59:19,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 59 [2022-07-22 21:59:19,774 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-22 21:59:19,775 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 142 treesize of output 94 [2022-07-22 21:59:20,147 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:59:20,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463168419] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:59:20,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:59:20,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 27] total 72 [2022-07-22 21:59:20,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39670018] [2022-07-22 21:59:20,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:59:20,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-22 21:59:20,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:59:20,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-22 21:59:20,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=4532, Unknown=71, NotChecked=0, Total=5112 [2022-07-22 21:59:20,153 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 171 [2022-07-22 21:59:20,155 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 500 transitions, 3635 flow. Second operand has 72 states, 72 states have (on average 69.16666666666667) internal successors, (4980), 72 states have internal predecessors, (4980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:20,155 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:59:20,155 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 171 [2022-07-22 21:59:20,155 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:59:50,457 INFO L129 PetriNetUnfolder]: 18834/43357 cut-off events. [2022-07-22 21:59:50,457 INFO L130 PetriNetUnfolder]: For 1240841/1242177 co-relation queries the response was YES. [2022-07-22 21:59:51,290 INFO L84 FinitePrefix]: Finished finitePrefix Result has 286318 conditions, 43357 events. 18834/43357 cut-off events. For 1240841/1242177 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 453702 event pairs, 2803 based on Foata normal form. 449/42005 useless extension candidates. Maximal degree in co-relation 286195. Up to 9970 conditions per place. [2022-07-22 21:59:51,719 INFO L132 encePairwiseOnDemand]: 125/171 looper letters, 1266 selfloop transitions, 806 changer transitions 51/2330 dead transitions. [2022-07-22 21:59:51,719 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 592 places, 2330 transitions, 30909 flow [2022-07-22 21:59:51,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2022-07-22 21:59:51,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2022-07-22 21:59:51,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 14342 transitions. [2022-07-22 21:59:51,742 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.42791502565938655 [2022-07-22 21:59:51,742 INFO L72 ComplementDD]: Start complementDD. Operand 196 states and 14342 transitions. [2022-07-22 21:59:51,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 196 states and 14342 transitions. [2022-07-22 21:59:51,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:59:51,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 196 states and 14342 transitions. [2022-07-22 21:59:51,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 197 states, 196 states have (on average 73.1734693877551) internal successors, (14342), 196 states have internal predecessors, (14342), 0 states have call successors, (0), 0 states 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 21:59:51,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 197 states, 197 states have (on average 171.0) internal successors, (33687), 197 states have internal predecessors, (33687), 0 states have call successors, (0), 0 states 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 21:59:51,823 INFO L81 ComplementDD]: Finished complementDD. Result has 197 states, 197 states have (on average 171.0) internal successors, (33687), 197 states have internal predecessors, (33687), 0 states have call successors, (0), 0 states 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 21:59:51,824 INFO L186 Difference]: Start difference. First operand has 428 places, 500 transitions, 3635 flow. Second operand 196 states and 14342 transitions. [2022-07-22 21:59:51,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 592 places, 2330 transitions, 30909 flow [2022-07-22 21:59:54,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 2330 transitions, 30118 flow, removed 337 selfloop flow, removed 16 redundant places. [2022-07-22 21:59:54,490 INFO L242 Difference]: Finished difference. Result has 735 places, 1330 transitions, 15074 flow [2022-07-22 21:59:54,491 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=3370, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=196, PETRI_FLOW=15074, PETRI_PLACES=735, PETRI_TRANSITIONS=1330} [2022-07-22 21:59:54,491 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 582 predicate places. [2022-07-22 21:59:54,491 INFO L495 AbstractCegarLoop]: Abstraction has has 735 places, 1330 transitions, 15074 flow [2022-07-22 21:59:54,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 69.16666666666667) internal successors, (4980), 72 states have internal predecessors, (4980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:54,493 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:59:54,493 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:59:54,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-22 21:59:54,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:59:54,707 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 21:59:54,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:59:54,708 INFO L85 PathProgramCache]: Analyzing trace with hash 424760084, now seen corresponding path program 3 times [2022-07-22 21:59:54,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:59:54,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844899211] [2022-07-22 21:59:54,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:59:54,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:59:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:55,276 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:55,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:59:55,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844899211] [2022-07-22 21:59:55,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844899211] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:59:55,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231743425] [2022-07-22 21:59:55,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:59:55,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:59:55,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:59:55,278 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 21:59:55,279 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 21:59:55,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 21:59:55,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:59:55,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-22 21:59:55,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:59:56,489 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 15 treesize of output 7 [2022-07-22 21:59:56,502 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:59:56,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:59:56,783 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-22 21:59:56,784 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 19 treesize of output 11 [2022-07-22 21:59:57,200 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:59:57,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231743425] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:59:57,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:59:57,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 20] total 59 [2022-07-22 21:59:57,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602172720] [2022-07-22 21:59:57,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:59:57,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-22 21:59:57,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:59:57,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-22 21:59:57,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=3076, Unknown=0, NotChecked=0, Total=3422 [2022-07-22 21:59:57,205 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 171 [2022-07-22 21:59:57,207 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 735 places, 1330 transitions, 15074 flow. Second operand has 59 states, 59 states have (on average 79.66101694915254) internal successors, (4700), 59 states have internal predecessors, (4700), 0 states have call successors, (0), 0 states 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 21:59:57,207 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:59:57,207 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 171 [2022-07-22 21:59:57,208 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand