./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 f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/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-?-f4b24e3 [2022-07-13 22:23:12,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:23:12,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:23:12,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:23:12,746 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:23:12,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:23:12,748 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:23:12,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:23:12,754 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:23:12,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:23:12,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:23:12,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:23:12,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:23:12,757 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:23:12,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:23:12,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:23:12,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:23:12,776 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:23:12,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:23:12,786 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:23:12,787 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:23:12,790 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:23:12,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:23:12,792 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:23:12,793 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:23:12,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:23:12,795 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:23:12,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:23:12,796 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:23:12,797 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:23:12,798 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:23:12,798 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:23:12,806 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:23:12,807 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:23:12,807 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:23:12,808 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:23:12,808 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:23:12,808 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:23:12,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:23:12,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:23:12,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:23:12,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:23:12,812 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 22:23:12,841 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:23:12,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:23:12,841 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:23:12,841 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:23:12,842 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:23:12,842 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:23:12,842 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:23:12,842 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:23:12,843 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:23:12,843 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:23:12,843 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 22:23:12,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:23:12,843 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 22:23:12,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:23:12,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:23:12,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:23:12,844 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:23:12,844 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 22:23:12,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:23:12,844 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:23:12,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:23:12,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:23:12,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:23:12,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:23:12,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:23:12,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:23:12,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:23:12,845 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:23:12,845 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:23:12,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:23:12,846 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:23:12,846 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:23:12,846 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:23:12,846 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf [2022-07-13 22:23:13,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:23:13,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:23:13,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:23:13,055 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:23:13,055 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:23:13,056 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-2.wvr.c [2022-07-13 22:23:13,122 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0cbe1f95/8a96d7adb2274d7086cafd3ee714dcab/FLAGf0a66ac12 [2022-07-13 22:23:13,531 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:23:13,532 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-2.wvr.c [2022-07-13 22:23:13,536 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0cbe1f95/8a96d7adb2274d7086cafd3ee714dcab/FLAGf0a66ac12 [2022-07-13 22:23:13,546 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0cbe1f95/8a96d7adb2274d7086cafd3ee714dcab [2022-07-13 22:23:13,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:23:13,549 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:23:13,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:23:13,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:23:13,553 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:23:13,553 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:23:13" (1/1) ... [2022-07-13 22:23:13,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@798095c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:13, skipping insertion in model container [2022-07-13 22:23:13,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:23:13" (1/1) ... [2022-07-13 22:23:13,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:23:13,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:23:13,674 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] [2022-07-13 22:23:13,687 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:23:13,692 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:23:13,720 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] [2022-07-13 22:23:13,722 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:23:13,731 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:23:13,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:13 WrapperNode [2022-07-13 22:23:13,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:23:13,735 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:23:13,736 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:23:13,736 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:23:13,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:13" (1/1) ... [2022-07-13 22:23:13,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:13" (1/1) ... [2022-07-13 22:23:13,760 INFO L137 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 134 [2022-07-13 22:23:13,760 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:23:13,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:23:13,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:23:13,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:23:13,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:13" (1/1) ... [2022-07-13 22:23:13,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:13" (1/1) ... [2022-07-13 22:23:13,768 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:13" (1/1) ... [2022-07-13 22:23:13,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:13" (1/1) ... [2022-07-13 22:23:13,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:13" (1/1) ... [2022-07-13 22:23:13,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:13" (1/1) ... [2022-07-13 22:23:13,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:13" (1/1) ... [2022-07-13 22:23:13,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:23:13,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:23:13,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:23:13,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:23:13,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:13" (1/1) ... [2022-07-13 22:23:13,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:23:13,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:23:13,800 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 22:23:13,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 22:23:13,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:23:13,829 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-13 22:23:13,829 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-13 22:23:13,829 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-13 22:23:13,829 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-13 22:23:13,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:23:13,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:23:13,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:23:13,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 22:23:13,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:23:13,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:23:13,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:23:13,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:23:13,832 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 22:23:13,893 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:23:13,895 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:23:14,101 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:23:14,107 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:23:14,107 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 22:23:14,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:23:14 BoogieIcfgContainer [2022-07-13 22:23:14,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:23:14,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:23:14,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:23:14,112 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:23:14,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:23:13" (1/3) ... [2022-07-13 22:23:14,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b927ce0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:23:14, skipping insertion in model container [2022-07-13 22:23:14,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:13" (2/3) ... [2022-07-13 22:23:14,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b927ce0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:23:14, skipping insertion in model container [2022-07-13 22:23:14,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:23:14" (3/3) ... [2022-07-13 22:23:14,115 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2022-07-13 22:23:14,118 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 22:23:14,124 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:23:14,124 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:23:14,124 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 22:23:14,206 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 22:23:14,255 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 164 places, 171 transitions, 358 flow [2022-07-13 22:23:14,324 INFO L129 PetriNetUnfolder]: 14/169 cut-off events. [2022-07-13 22:23:14,324 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:23:14,327 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. [2022-07-13 22:23:14,327 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 171 transitions, 358 flow [2022-07-13 22:23:14,335 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 160 transitions, 332 flow [2022-07-13 22:23:14,346 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:23:14,352 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@273c5180, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@d861d89 [2022-07-13 22:23:14,353 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-13 22:23:14,387 INFO L129 PetriNetUnfolder]: 13/156 cut-off events. [2022-07-13 22:23:14,387 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:23:14,388 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:14,388 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] [2022-07-13 22:23:14,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:14,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:14,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1481437362, now seen corresponding path program 1 times [2022-07-13 22:23:14,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:14,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879732282] [2022-07-13 22:23:14,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:14,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:14,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:14,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:14,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879732282] [2022-07-13 22:23:14,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879732282] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:23:14,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:23:14,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 22:23:14,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692031491] [2022-07-13 22:23:14,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:23:14,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 22:23:14,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:14,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 22:23:14,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 22:23:14,627 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 171 [2022-07-13 22:23:14,632 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) [2022-07-13 22:23:14,633 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:14,633 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 171 [2022-07-13 22:23:14,634 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:14,671 INFO L129 PetriNetUnfolder]: 3/149 cut-off events. [2022-07-13 22:23:14,672 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-13 22:23:14,673 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. [2022-07-13 22:23:14,675 INFO L132 encePairwiseOnDemand]: 160/171 looper letters, 4 selfloop transitions, 0 changer transitions 5/149 dead transitions. [2022-07-13 22:23:14,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 149 transitions, 318 flow [2022-07-13 22:23:14,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 22:23:14,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 22:23:14,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 325 transitions. [2022-07-13 22:23:14,689 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9502923976608187 [2022-07-13 22:23:14,689 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 325 transitions. [2022-07-13 22:23:14,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 325 transitions. [2022-07-13 22:23:14,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:14,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 325 transitions. [2022-07-13 22:23:14,704 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) [2022-07-13 22:23:14,710 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) [2022-07-13 22:23:14,710 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) [2022-07-13 22:23:14,711 INFO L186 Difference]: Start difference. First operand has 153 places, 160 transitions, 332 flow. Second operand 2 states and 325 transitions. [2022-07-13 22:23:14,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 149 transitions, 318 flow [2022-07-13 22:23:14,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 149 transitions, 310 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:23:14,716 INFO L242 Difference]: Finished difference. Result has 150 places, 144 transitions, 292 flow [2022-07-13 22:23:14,717 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} [2022-07-13 22:23:14,719 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, -3 predicate places. [2022-07-13 22:23:14,719 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 144 transitions, 292 flow [2022-07-13 22:23:14,720 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) [2022-07-13 22:23:14,720 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:14,720 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] [2022-07-13 22:23:14,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:23:14,720 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:14,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:14,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1667863150, now seen corresponding path program 1 times [2022-07-13 22:23:14,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:14,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528139380] [2022-07-13 22:23:14,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:14,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:14,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:14,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:14,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528139380] [2022-07-13 22:23:14,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528139380] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:23:14,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:23:14,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 22:23:14,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010204452] [2022-07-13 22:23:14,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:23:14,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 22:23:14,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:14,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 22:23:14,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-13 22:23:14,994 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 171 [2022-07-13 22:23:14,995 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) [2022-07-13 22:23:14,995 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:14,995 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 171 [2022-07-13 22:23:14,995 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:15,099 INFO L129 PetriNetUnfolder]: 16/244 cut-off events. [2022-07-13 22:23:15,100 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-13 22:23:15,102 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. [2022-07-13 22:23:15,103 INFO L132 encePairwiseOnDemand]: 163/171 looper letters, 36 selfloop transitions, 7 changer transitions 0/148 dead transitions. [2022-07-13 22:23:15,104 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 148 transitions, 386 flow [2022-07-13 22:23:15,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 22:23:15,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 22:23:15,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 964 transitions. [2022-07-13 22:23:15,107 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7046783625730995 [2022-07-13 22:23:15,107 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 964 transitions. [2022-07-13 22:23:15,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 964 transitions. [2022-07-13 22:23:15,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:15,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 964 transitions. [2022-07-13 22:23:15,112 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) [2022-07-13 22:23:15,115 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) [2022-07-13 22:23:15,116 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) [2022-07-13 22:23:15,116 INFO L186 Difference]: Start difference. First operand has 150 places, 144 transitions, 292 flow. Second operand 8 states and 964 transitions. [2022-07-13 22:23:15,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 148 transitions, 386 flow [2022-07-13 22:23:15,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 148 transitions, 386 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:23:15,121 INFO L242 Difference]: Finished difference. Result has 153 places, 145 transitions, 314 flow [2022-07-13 22:23:15,122 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} [2022-07-13 22:23:15,122 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 0 predicate places. [2022-07-13 22:23:15,123 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 145 transitions, 314 flow [2022-07-13 22:23:15,123 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) [2022-07-13 22:23:15,123 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:15,124 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] [2022-07-13 22:23:15,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 22:23:15,125 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:15,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:15,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1651907158, now seen corresponding path program 1 times [2022-07-13 22:23:15,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:15,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127280505] [2022-07-13 22:23:15,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:15,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:15,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:15,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127280505] [2022-07-13 22:23:15,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127280505] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:23:15,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:23:15,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:23:15,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645936900] [2022-07-13 22:23:15,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:23:15,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:23:15,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:15,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:23:15,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:23:15,314 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 171 [2022-07-13 22:23:15,314 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) [2022-07-13 22:23:15,315 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:15,315 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 171 [2022-07-13 22:23:15,315 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:15,450 INFO L129 PetriNetUnfolder]: 73/531 cut-off events. [2022-07-13 22:23:15,451 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-07-13 22:23:15,452 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. [2022-07-13 22:23:15,454 INFO L132 encePairwiseOnDemand]: 164/171 looper letters, 53 selfloop transitions, 5 changer transitions 4/172 dead transitions. [2022-07-13 22:23:15,454 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 172 transitions, 497 flow [2022-07-13 22:23:15,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:23:15,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:23:15,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 777 transitions. [2022-07-13 22:23:15,456 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7573099415204678 [2022-07-13 22:23:15,456 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 777 transitions. [2022-07-13 22:23:15,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 777 transitions. [2022-07-13 22:23:15,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:15,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 777 transitions. [2022-07-13 22:23:15,458 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) [2022-07-13 22:23:15,460 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) [2022-07-13 22:23:15,460 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) [2022-07-13 22:23:15,460 INFO L186 Difference]: Start difference. First operand has 153 places, 145 transitions, 314 flow. Second operand 6 states and 777 transitions. [2022-07-13 22:23:15,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 172 transitions, 497 flow [2022-07-13 22:23:15,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 172 transitions, 485 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-13 22:23:15,466 INFO L242 Difference]: Finished difference. Result has 155 places, 148 transitions, 331 flow [2022-07-13 22:23:15,466 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} [2022-07-13 22:23:15,468 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 2 predicate places. [2022-07-13 22:23:15,468 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 148 transitions, 331 flow [2022-07-13 22:23:15,468 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) [2022-07-13 22:23:15,468 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:15,477 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] [2022-07-13 22:23:15,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 22:23:15,477 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:15,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:15,478 INFO L85 PathProgramCache]: Analyzing trace with hash 993199323, now seen corresponding path program 1 times [2022-07-13 22:23:15,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:15,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584095886] [2022-07-13 22:23:15,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:15,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:15,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:15,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584095886] [2022-07-13 22:23:15,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584095886] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:23:15,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238823892] [2022-07-13 22:23:15,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:15,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:23:15,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:23:15,595 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:23:15,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 22:23:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:15,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 22:23:15,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:23:15,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:15,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:23:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:15,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238823892] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 22:23:15,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 22:23:15,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-07-13 22:23:15,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273956808] [2022-07-13 22:23:15,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:23:15,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 22:23:15,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:15,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 22:23:15,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-13 22:23:15,902 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 171 [2022-07-13 22:23:15,902 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) [2022-07-13 22:23:15,903 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:15,903 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 171 [2022-07-13 22:23:15,903 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:15,968 INFO L129 PetriNetUnfolder]: 80/582 cut-off events. [2022-07-13 22:23:15,968 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-07-13 22:23:15,969 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. [2022-07-13 22:23:15,971 INFO L132 encePairwiseOnDemand]: 166/171 looper letters, 22 selfloop transitions, 5 changer transitions 1/160 dead transitions. [2022-07-13 22:23:15,971 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 160 transitions, 415 flow [2022-07-13 22:23:15,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 22:23:15,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-13 22:23:15,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 601 transitions. [2022-07-13 22:23:15,972 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8786549707602339 [2022-07-13 22:23:15,972 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 601 transitions. [2022-07-13 22:23:15,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 601 transitions. [2022-07-13 22:23:15,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:15,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 601 transitions. [2022-07-13 22:23:15,974 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) [2022-07-13 22:23:15,975 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) [2022-07-13 22:23:15,975 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) [2022-07-13 22:23:15,975 INFO L186 Difference]: Start difference. First operand has 155 places, 148 transitions, 331 flow. Second operand 4 states and 601 transitions. [2022-07-13 22:23:15,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 160 transitions, 415 flow [2022-07-13 22:23:15,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 160 transitions, 411 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-13 22:23:15,978 INFO L242 Difference]: Finished difference. Result has 157 places, 152 transitions, 363 flow [2022-07-13 22:23:15,978 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} [2022-07-13 22:23:15,979 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 4 predicate places. [2022-07-13 22:23:15,979 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 152 transitions, 363 flow [2022-07-13 22:23:15,979 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) [2022-07-13 22:23:15,979 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:15,979 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] [2022-07-13 22:23:16,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 22:23:16,203 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 [2022-07-13 22:23:16,204 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:16,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:16,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1049045293, now seen corresponding path program 2 times [2022-07-13 22:23:16,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:16,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668662057] [2022-07-13 22:23:16,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:16,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:16,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:16,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668662057] [2022-07-13 22:23:16,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668662057] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:23:16,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:23:16,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:23:16,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956100602] [2022-07-13 22:23:16,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:23:16,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:23:16,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:16,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:23:16,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:23:16,292 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 171 [2022-07-13 22:23:16,292 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) [2022-07-13 22:23:16,292 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:16,292 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 171 [2022-07-13 22:23:16,293 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:16,415 INFO L129 PetriNetUnfolder]: 131/795 cut-off events. [2022-07-13 22:23:16,415 INFO L130 PetriNetUnfolder]: For 175/175 co-relation queries the response was YES. [2022-07-13 22:23:16,417 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. [2022-07-13 22:23:16,420 INFO L132 encePairwiseOnDemand]: 163/171 looper letters, 49 selfloop transitions, 11 changer transitions 5/194 dead transitions. [2022-07-13 22:23:16,420 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 194 transitions, 641 flow [2022-07-13 22:23:16,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:23:16,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:23:16,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 899 transitions. [2022-07-13 22:23:16,422 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8762183235867447 [2022-07-13 22:23:16,422 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 899 transitions. [2022-07-13 22:23:16,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 899 transitions. [2022-07-13 22:23:16,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:16,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 899 transitions. [2022-07-13 22:23:16,424 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) [2022-07-13 22:23:16,425 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) [2022-07-13 22:23:16,425 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) [2022-07-13 22:23:16,425 INFO L186 Difference]: Start difference. First operand has 157 places, 152 transitions, 363 flow. Second operand 6 states and 899 transitions. [2022-07-13 22:23:16,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 194 transitions, 641 flow [2022-07-13 22:23:16,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 194 transitions, 641 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:23:16,430 INFO L242 Difference]: Finished difference. Result has 166 places, 162 transitions, 463 flow [2022-07-13 22:23:16,430 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} [2022-07-13 22:23:16,432 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 13 predicate places. [2022-07-13 22:23:16,432 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 162 transitions, 463 flow [2022-07-13 22:23:16,432 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) [2022-07-13 22:23:16,432 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:16,432 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] [2022-07-13 22:23:16,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 22:23:16,433 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:16,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:16,433 INFO L85 PathProgramCache]: Analyzing trace with hash 431742831, now seen corresponding path program 3 times [2022-07-13 22:23:16,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:16,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538377143] [2022-07-13 22:23:16,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:16,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:16,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:16,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538377143] [2022-07-13 22:23:16,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538377143] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:23:16,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541414339] [2022-07-13 22:23:16,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:23:16,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:23:16,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:23:16,535 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:23:16,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 22:23:16,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-13 22:23:16,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:23:16,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 22:23:16,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:23:16,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:16,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:23:16,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:16,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541414339] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:23:16,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:23:16,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-07-13 22:23:16,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129140815] [2022-07-13 22:23:16,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:23:16,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 22:23:16,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:16,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 22:23:16,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-07-13 22:23:16,776 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 171 [2022-07-13 22:23:16,777 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) [2022-07-13 22:23:16,777 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:16,777 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 171 [2022-07-13 22:23:16,778 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:16,902 INFO L129 PetriNetUnfolder]: 146/920 cut-off events. [2022-07-13 22:23:16,902 INFO L130 PetriNetUnfolder]: For 601/601 co-relation queries the response was YES. [2022-07-13 22:23:16,904 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. [2022-07-13 22:23:16,907 INFO L132 encePairwiseOnDemand]: 163/171 looper letters, 49 selfloop transitions, 19 changer transitions 6/203 dead transitions. [2022-07-13 22:23:16,907 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 203 transitions, 805 flow [2022-07-13 22:23:16,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:23:16,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:23:16,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1039 transitions. [2022-07-13 22:23:16,909 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8680033416875522 [2022-07-13 22:23:16,909 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1039 transitions. [2022-07-13 22:23:16,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1039 transitions. [2022-07-13 22:23:16,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:16,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1039 transitions. [2022-07-13 22:23:16,911 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) [2022-07-13 22:23:16,912 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) [2022-07-13 22:23:16,913 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) [2022-07-13 22:23:16,913 INFO L186 Difference]: Start difference. First operand has 166 places, 162 transitions, 463 flow. Second operand 7 states and 1039 transitions. [2022-07-13 22:23:16,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 203 transitions, 805 flow [2022-07-13 22:23:16,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 203 transitions, 805 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:23:16,917 INFO L242 Difference]: Finished difference. Result has 176 places, 171 transitions, 618 flow [2022-07-13 22:23:16,918 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} [2022-07-13 22:23:16,918 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 23 predicate places. [2022-07-13 22:23:16,918 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 171 transitions, 618 flow [2022-07-13 22:23:16,919 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) [2022-07-13 22:23:16,919 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:16,919 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] [2022-07-13 22:23:16,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 22:23:17,135 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 [2022-07-13 22:23:17,135 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:17,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:17,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1255643103, now seen corresponding path program 4 times [2022-07-13 22:23:17,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:17,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984916987] [2022-07-13 22:23:17,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:17,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:17,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:17,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:17,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984916987] [2022-07-13 22:23:17,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984916987] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:23:17,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:23:17,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:23:17,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66091408] [2022-07-13 22:23:17,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:23:17,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:23:17,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:17,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:23:17,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:23:17,211 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 171 [2022-07-13 22:23:17,212 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) [2022-07-13 22:23:17,212 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:17,212 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 171 [2022-07-13 22:23:17,212 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:17,347 INFO L129 PetriNetUnfolder]: 144/876 cut-off events. [2022-07-13 22:23:17,348 INFO L130 PetriNetUnfolder]: For 1298/1298 co-relation queries the response was YES. [2022-07-13 22:23:17,350 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. [2022-07-13 22:23:17,353 INFO L132 encePairwiseOnDemand]: 164/171 looper letters, 38 selfloop transitions, 10 changer transitions 9/186 dead transitions. [2022-07-13 22:23:17,353 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 186 transitions, 807 flow [2022-07-13 22:23:17,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:23:17,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:23:17,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 878 transitions. [2022-07-13 22:23:17,355 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8557504873294347 [2022-07-13 22:23:17,356 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 878 transitions. [2022-07-13 22:23:17,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 878 transitions. [2022-07-13 22:23:17,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:17,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 878 transitions. [2022-07-13 22:23:17,357 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) [2022-07-13 22:23:17,359 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) [2022-07-13 22:23:17,359 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) [2022-07-13 22:23:17,359 INFO L186 Difference]: Start difference. First operand has 176 places, 171 transitions, 618 flow. Second operand 6 states and 878 transitions. [2022-07-13 22:23:17,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 186 transitions, 807 flow [2022-07-13 22:23:17,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 186 transitions, 791 flow, removed 8 selfloop flow, removed 0 redundant places. [2022-07-13 22:23:17,365 INFO L242 Difference]: Finished difference. Result has 184 places, 171 transitions, 638 flow [2022-07-13 22:23:17,365 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} [2022-07-13 22:23:17,366 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 31 predicate places. [2022-07-13 22:23:17,366 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 171 transitions, 638 flow [2022-07-13 22:23:17,366 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) [2022-07-13 22:23:17,366 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:17,366 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] [2022-07-13 22:23:17,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 22:23:17,367 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:17,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:17,367 INFO L85 PathProgramCache]: Analyzing trace with hash 2007351072, now seen corresponding path program 1 times [2022-07-13 22:23:17,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:17,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757359674] [2022-07-13 22:23:17,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:17,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:17,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:17,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:17,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757359674] [2022-07-13 22:23:17,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757359674] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:23:17,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:23:17,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:23:17,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247480276] [2022-07-13 22:23:17,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:23:17,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:23:17,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:17,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:23:17,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:23:17,451 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 171 [2022-07-13 22:23:17,452 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) [2022-07-13 22:23:17,452 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:17,452 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 171 [2022-07-13 22:23:17,452 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:17,615 INFO L129 PetriNetUnfolder]: 168/1041 cut-off events. [2022-07-13 22:23:17,615 INFO L130 PetriNetUnfolder]: For 1574/1574 co-relation queries the response was YES. [2022-07-13 22:23:17,618 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. [2022-07-13 22:23:17,621 INFO L132 encePairwiseOnDemand]: 164/171 looper letters, 46 selfloop transitions, 18 changer transitions 5/198 dead transitions. [2022-07-13 22:23:17,621 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 198 transitions, 922 flow [2022-07-13 22:23:17,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:23:17,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:23:17,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1034 transitions. [2022-07-13 22:23:17,623 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8638262322472848 [2022-07-13 22:23:17,623 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1034 transitions. [2022-07-13 22:23:17,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1034 transitions. [2022-07-13 22:23:17,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:17,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1034 transitions. [2022-07-13 22:23:17,626 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) [2022-07-13 22:23:17,627 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) [2022-07-13 22:23:17,628 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) [2022-07-13 22:23:17,629 INFO L186 Difference]: Start difference. First operand has 184 places, 171 transitions, 638 flow. Second operand 7 states and 1034 transitions. [2022-07-13 22:23:17,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 198 transitions, 922 flow [2022-07-13 22:23:17,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 198 transitions, 888 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-07-13 22:23:17,638 INFO L242 Difference]: Finished difference. Result has 186 places, 175 transitions, 703 flow [2022-07-13 22:23:17,638 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} [2022-07-13 22:23:17,640 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 33 predicate places. [2022-07-13 22:23:17,640 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 175 transitions, 703 flow [2022-07-13 22:23:17,640 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) [2022-07-13 22:23:17,640 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:17,640 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] [2022-07-13 22:23:17,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 22:23:17,641 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:17,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:17,641 INFO L85 PathProgramCache]: Analyzing trace with hash 301519184, now seen corresponding path program 2 times [2022-07-13 22:23:17,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:17,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384644358] [2022-07-13 22:23:17,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:17,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:17,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:17,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384644358] [2022-07-13 22:23:17,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384644358] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:23:17,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:23:17,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:23:17,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104123441] [2022-07-13 22:23:17,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:23:17,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:23:17,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:17,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:23:17,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:23:17,730 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 171 [2022-07-13 22:23:17,731 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) [2022-07-13 22:23:17,731 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:17,731 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 171 [2022-07-13 22:23:17,731 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:17,848 INFO L129 PetriNetUnfolder]: 161/974 cut-off events. [2022-07-13 22:23:17,849 INFO L130 PetriNetUnfolder]: For 1694/1694 co-relation queries the response was YES. [2022-07-13 22:23:17,864 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. [2022-07-13 22:23:17,867 INFO L132 encePairwiseOnDemand]: 164/171 looper letters, 49 selfloop transitions, 19 changer transitions 4/201 dead transitions. [2022-07-13 22:23:17,867 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 201 transitions, 994 flow [2022-07-13 22:23:17,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:23:17,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:23:17,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 893 transitions. [2022-07-13 22:23:17,868 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8703703703703703 [2022-07-13 22:23:17,868 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 893 transitions. [2022-07-13 22:23:17,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 893 transitions. [2022-07-13 22:23:17,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:17,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 893 transitions. [2022-07-13 22:23:17,870 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) [2022-07-13 22:23:17,871 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) [2022-07-13 22:23:17,872 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) [2022-07-13 22:23:17,872 INFO L186 Difference]: Start difference. First operand has 186 places, 175 transitions, 703 flow. Second operand 6 states and 893 transitions. [2022-07-13 22:23:17,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 201 transitions, 994 flow [2022-07-13 22:23:17,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 201 transitions, 949 flow, removed 10 selfloop flow, removed 2 redundant places. [2022-07-13 22:23:17,877 INFO L242 Difference]: Finished difference. Result has 191 places, 175 transitions, 724 flow [2022-07-13 22:23:17,877 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} [2022-07-13 22:23:17,878 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 38 predicate places. [2022-07-13 22:23:17,878 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 175 transitions, 724 flow [2022-07-13 22:23:17,878 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) [2022-07-13 22:23:17,878 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:17,878 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:23:17,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 22:23:17,879 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:17,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:17,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1718782997, now seen corresponding path program 1 times [2022-07-13 22:23:17,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:17,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454212422] [2022-07-13 22:23:17,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:17,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:17,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:17,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454212422] [2022-07-13 22:23:17,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454212422] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:23:17,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312642894] [2022-07-13 22:23:17,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:17,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:23:17,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:23:17,964 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:23:17,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 22:23:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:18,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-13 22:23:18,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:23:18,451 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-07-13 22:23:18,452 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 [2022-07-13 22:23:18,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:18,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:23:18,771 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-13 22:23:18,772 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 [2022-07-13 22:23:19,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:19,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312642894] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:23:19,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:23:19,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 18, 18] total 33 [2022-07-13 22:23:19,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562300596] [2022-07-13 22:23:19,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:23:19,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-13 22:23:19,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:19,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-13 22:23:19,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 22:23:19,302 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 171 [2022-07-13 22:23:19,304 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) [2022-07-13 22:23:19,304 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:19,304 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 171 [2022-07-13 22:23:19,304 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:27,283 INFO L129 PetriNetUnfolder]: 7192/15720 cut-off events. [2022-07-13 22:23:27,283 INFO L130 PetriNetUnfolder]: For 19270/19522 co-relation queries the response was YES. [2022-07-13 22:23:27,325 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. [2022-07-13 22:23:27,382 INFO L132 encePairwiseOnDemand]: 132/171 looper letters, 694 selfloop transitions, 335 changer transitions 193/1297 dead transitions. [2022-07-13 22:23:27,382 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 1297 transitions, 7198 flow [2022-07-13 22:23:27,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-07-13 22:23:27,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2022-07-13 22:23:27,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 12402 transitions. [2022-07-13 22:23:27,400 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5036549707602339 [2022-07-13 22:23:27,400 INFO L72 ComplementDD]: Start complementDD. Operand 144 states and 12402 transitions. [2022-07-13 22:23:27,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 144 states and 12402 transitions. [2022-07-13 22:23:27,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:27,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 144 states and 12402 transitions. [2022-07-13 22:23:27,425 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) [2022-07-13 22:23:27,465 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) [2022-07-13 22:23:27,474 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) [2022-07-13 22:23:27,475 INFO L186 Difference]: Start difference. First operand has 191 places, 175 transitions, 724 flow. Second operand 144 states and 12402 transitions. [2022-07-13 22:23:27,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 1297 transitions, 7198 flow [2022-07-13 22:23:27,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 1297 transitions, 7014 flow, removed 17 selfloop flow, removed 5 redundant places. [2022-07-13 22:23:27,511 INFO L242 Difference]: Finished difference. Result has 428 places, 500 transitions, 3635 flow [2022-07-13 22:23:27,512 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} [2022-07-13 22:23:27,513 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 275 predicate places. [2022-07-13 22:23:27,513 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 500 transitions, 3635 flow [2022-07-13 22:23:27,513 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) [2022-07-13 22:23:27,514 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:27,514 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] [2022-07-13 22:23:27,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 22:23:27,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:23:27,727 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:27,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:27,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1025215518, now seen corresponding path program 2 times [2022-07-13 22:23:27,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:27,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641351971] [2022-07-13 22:23:27,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:27,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:28,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:28,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641351971] [2022-07-13 22:23:28,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641351971] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:23:28,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947237773] [2022-07-13 22:23:28,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:23:28,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:23:28,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:23:28,243 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:23:28,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 22:23:28,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:23:28,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:23:28,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-13 22:23:28,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:23:28,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:23:28,377 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-13 22:23:28,378 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 [2022-07-13 22:23:28,589 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 22:23:28,590 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 [2022-07-13 22:23:28,684 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 [2022-07-13 22:23:28,912 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 [2022-07-13 22:23:28,954 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 [2022-07-13 22:23:29,637 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 22:23:29,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-07-13 22:23:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:23:29,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:23:32,069 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:23:32,070 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 [2022-07-13 22:23:32,079 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-13 22:23:32,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 173 [2022-07-13 22:23:32,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 22:23:32,086 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 [2022-07-13 22:23:32,092 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-13 22:23:32,092 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 [2022-07-13 22:23:32,420 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:23:32,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947237773] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:23:32,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:23:32,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 27] total 72 [2022-07-13 22:23:32,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703525559] [2022-07-13 22:23:32,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:23:32,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-13 22:23:32,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:32,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-13 22:23:32,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=4536, Unknown=66, NotChecked=0, Total=5112 [2022-07-13 22:23:32,427 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 171 [2022-07-13 22:23:32,429 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) [2022-07-13 22:23:32,429 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:32,429 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 171 [2022-07-13 22:23:32,430 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:59,651 INFO L129 PetriNetUnfolder]: 18808/43317 cut-off events. [2022-07-13 22:23:59,652 INFO L130 PetriNetUnfolder]: For 1240595/1241931 co-relation queries the response was YES. [2022-07-13 22:24:00,228 INFO L84 FinitePrefix]: Finished finitePrefix Result has 286154 conditions, 43317 events. 18808/43317 cut-off events. For 1240595/1241931 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 453373 event pairs, 2798 based on Foata normal form. 449/41976 useless extension candidates. Maximal degree in co-relation 286031. Up to 9962 conditions per place. [2022-07-13 22:24:00,445 INFO L132 encePairwiseOnDemand]: 125/171 looper letters, 1264 selfloop transitions, 801 changer transitions 49/2321 dead transitions. [2022-07-13 22:24:00,446 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 592 places, 2321 transitions, 30863 flow [2022-07-13 22:24:00,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2022-07-13 22:24:00,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2022-07-13 22:24:00,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 14335 transitions. [2022-07-13 22:24:00,466 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.42770617018737317 [2022-07-13 22:24:00,466 INFO L72 ComplementDD]: Start complementDD. Operand 196 states and 14335 transitions. [2022-07-13 22:24:00,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 196 states and 14335 transitions. [2022-07-13 22:24:00,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:24:00,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 196 states and 14335 transitions. [2022-07-13 22:24:00,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 197 states, 196 states have (on average 73.13775510204081) internal successors, (14335), 196 states have internal predecessors, (14335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:00,527 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) [2022-07-13 22:24:00,537 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) [2022-07-13 22:24:00,538 INFO L186 Difference]: Start difference. First operand has 428 places, 500 transitions, 3635 flow. Second operand 196 states and 14335 transitions. [2022-07-13 22:24:00,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 592 places, 2321 transitions, 30863 flow [2022-07-13 22:24:02,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 2321 transitions, 30068 flow, removed 339 selfloop flow, removed 16 redundant places. [2022-07-13 22:24:02,993 INFO L242 Difference]: Finished difference. Result has 727 places, 1357 transitions, 15816 flow [2022-07-13 22:24:02,994 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=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=196, PETRI_FLOW=15816, PETRI_PLACES=727, PETRI_TRANSITIONS=1357} [2022-07-13 22:24:02,994 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 574 predicate places. [2022-07-13 22:24:02,994 INFO L495 AbstractCegarLoop]: Abstraction has has 727 places, 1357 transitions, 15816 flow [2022-07-13 22:24:02,995 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) [2022-07-13 22:24:02,995 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:24:02,995 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] [2022-07-13 22:24:03,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 22:24:03,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:24:03,212 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:24:03,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:24:03,213 INFO L85 PathProgramCache]: Analyzing trace with hash 81108856, now seen corresponding path program 3 times [2022-07-13 22:24:03,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:24:03,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838921573] [2022-07-13 22:24:03,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:24:03,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:24:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:24:03,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:24:03,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838921573] [2022-07-13 22:24:03,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838921573] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:24:03,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552957036] [2022-07-13 22:24:03,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:24:03,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:24:03,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:24:03,756 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:24:03,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 22:24:03,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-13 22:24:03,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:24:03,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-13 22:24:03,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:24:04,090 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 15 treesize of output 11 [2022-07-13 22:24:04,313 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 [2022-07-13 22:24:04,351 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 [2022-07-13 22:24:05,063 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 22:24:05,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-07-13 22:24:05,077 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 22:24:05,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:24:07,052 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:24:07,052 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 [2022-07-13 22:24:07,061 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-13 22:24:07,061 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 [2022-07-13 22:24:07,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 22:24:07,066 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 [2022-07-13 22:24:07,072 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-13 22:24:07,073 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 [2022-07-13 22:24:07,277 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 22:24:07,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552957036] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:24:07,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:24:07,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29, 26] total 70 [2022-07-13 22:24:07,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708880863] [2022-07-13 22:24:07,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:24:07,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-07-13 22:24:07,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:24:07,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-07-13 22:24:07,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=4296, Unknown=60, NotChecked=0, Total=4830 [2022-07-13 22:24:07,303 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 171 [2022-07-13 22:24:07,305 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 727 places, 1357 transitions, 15816 flow. Second operand has 70 states, 70 states have (on average 72.27142857142857) internal successors, (5059), 70 states have internal predecessors, (5059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:07,306 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:24:07,306 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 171 [2022-07-13 22:24:07,306 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand