./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 95e3bac7f28ae020b684175cea363a5866905518c289fbd40a07a7a3764acade --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:46:51,686 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:46:51,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:46:51,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:46:51,734 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:46:51,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:46:51,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:46:51,737 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:46:51,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:46:51,738 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:46:51,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:46:51,740 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:46:51,740 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:46:51,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:46:51,741 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:46:51,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:46:51,743 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:46:51,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:46:51,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:46:51,746 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:46:51,747 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:46:51,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:46:51,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:46:51,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:46:51,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:46:51,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:46:51,752 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:46:51,752 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:46:51,753 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:46:51,753 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:46:51,754 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:46:51,754 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:46:51,755 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:46:51,755 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:46:51,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:46:51,757 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:46:51,757 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:46:51,757 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:46:51,758 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:46:51,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:46:51,758 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:46:51,759 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:46:51,760 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:46:51,778 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:46:51,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:46:51,779 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:46:51,779 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:46:51,780 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:46:51,780 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:46:51,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:46:51,780 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:46:51,780 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:46:51,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:46:51,781 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:46:51,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:46:51,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:46:51,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:46:51,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:46:51,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:46:51,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:46:51,782 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:46:51,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:46:51,783 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:46:51,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:46:51,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:46:51,783 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:46:51,783 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:46:51,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:46:51,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:46:51,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:46:51,784 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:46:51,784 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:46:51,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:46:51,785 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:46:51,785 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:46:51,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:46:51,785 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95e3bac7f28ae020b684175cea363a5866905518c289fbd40a07a7a3764acade [2022-07-19 21:46:51,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:46:52,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:46:52,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:46:52,003 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:46:52,003 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:46:52,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2022-07-19 21:46:52,046 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a46fd0e37/7205ab103740497696e84484a82c2460/FLAG24936d787 [2022-07-19 21:46:52,389 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:46:52,389 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2022-07-19 21:46:52,396 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a46fd0e37/7205ab103740497696e84484a82c2460/FLAG24936d787 [2022-07-19 21:46:52,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a46fd0e37/7205ab103740497696e84484a82c2460 [2022-07-19 21:46:52,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:46:52,414 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:46:52,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:46:52,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:46:52,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:46:52,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:46:52" (1/1) ... [2022-07-19 21:46:52,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@332d3f37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:52, skipping insertion in model container [2022-07-19 21:46:52,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:46:52" (1/1) ... [2022-07-19 21:46:52,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:46:52,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:46:52,620 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-cond-3.wvr.c[2641,2654] [2022-07-19 21:46:52,629 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:46:52,637 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:46:52,661 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c[2641,2654] [2022-07-19 21:46:52,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:46:52,677 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:46:52,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:52 WrapperNode [2022-07-19 21:46:52,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:46:52,680 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:46:52,680 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:46:52,680 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:46:52,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:52" (1/1) ... [2022-07-19 21:46:52,696 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:52" (1/1) ... [2022-07-19 21:46:52,719 INFO L137 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 162 [2022-07-19 21:46:52,720 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:46:52,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:46:52,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:46:52,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:46:52,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:52" (1/1) ... [2022-07-19 21:46:52,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:52" (1/1) ... [2022-07-19 21:46:52,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:52" (1/1) ... [2022-07-19 21:46:52,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:52" (1/1) ... [2022-07-19 21:46:52,732 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:52" (1/1) ... [2022-07-19 21:46:52,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:52" (1/1) ... [2022-07-19 21:46:52,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:52" (1/1) ... [2022-07-19 21:46:52,737 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:46:52,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:46:52,738 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:46:52,738 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:46:52,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:52" (1/1) ... [2022-07-19 21:46:52,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:46:52,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:46:52,774 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:46:52,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:46:52,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:46:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:46:52,818 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:46:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:46:52,818 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:46:52,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:46:52,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:46:52,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:46:52,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 21:46:52,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:46:52,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:46:52,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:46:52,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:46:52,835 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:46:52,934 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:46:52,935 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:46:53,215 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:46:53,222 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:46:53,222 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 21:46:53,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:46:53 BoogieIcfgContainer [2022-07-19 21:46:53,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:46:53,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:46:53,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:46:53,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:46:53,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:46:52" (1/3) ... [2022-07-19 21:46:53,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@717bf7e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:46:53, skipping insertion in model container [2022-07-19 21:46:53,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:52" (2/3) ... [2022-07-19 21:46:53,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@717bf7e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:46:53, skipping insertion in model container [2022-07-19 21:46:53,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:46:53" (3/3) ... [2022-07-19 21:46:53,229 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2022-07-19 21:46:53,233 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:46:53,239 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:46:53,239 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:46:53,239 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:46:53,314 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:46:53,344 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 198 places, 209 transitions, 434 flow [2022-07-19 21:46:53,389 INFO L129 PetriNetUnfolder]: 18/207 cut-off events. [2022-07-19 21:46:53,389 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:46:53,395 INFO L84 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 207 events. 18/207 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 317 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 111. Up to 2 conditions per place. [2022-07-19 21:46:53,395 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 209 transitions, 434 flow [2022-07-19 21:46:53,403 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 187 places, 198 transitions, 408 flow [2022-07-19 21:46:53,411 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:46:53,447 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@20f36025, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3d6674c2 [2022-07-19 21:46:53,448 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 21:46:53,468 INFO L129 PetriNetUnfolder]: 16/181 cut-off events. [2022-07-19 21:46:53,469 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:46:53,469 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:53,470 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] [2022-07-19 21:46:53,470 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:53,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:53,473 INFO L85 PathProgramCache]: Analyzing trace with hash -652717319, now seen corresponding path program 1 times [2022-07-19 21:46:53,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:53,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743357689] [2022-07-19 21:46:53,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:53,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:53,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:53,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:53,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743357689] [2022-07-19 21:46:53,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743357689] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:46:53,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:46:53,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:46:53,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359498656] [2022-07-19 21:46:53,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:46:53,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:46:53,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:53,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:46:53,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:46:53,704 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 209 [2022-07-19 21:46:53,708 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 198 transitions, 408 flow. Second operand has 2 states, 2 states have (on average 194.5) internal successors, (389), 2 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:53,709 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:53,709 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 209 [2022-07-19 21:46:53,709 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:53,764 INFO L129 PetriNetUnfolder]: 5/185 cut-off events. [2022-07-19 21:46:53,767 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-19 21:46:53,770 INFO L84 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 185 events. 5/185 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 283 event pairs, 0 based on Foata normal form. 16/186 useless extension candidates. Maximal degree in co-relation 104. Up to 5 conditions per place. [2022-07-19 21:46:53,772 INFO L132 encePairwiseOnDemand]: 196/209 looper letters, 4 selfloop transitions, 0 changer transitions 4/185 dead transitions. [2022-07-19 21:46:53,772 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 185 transitions, 390 flow [2022-07-19 21:46:53,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:46:53,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:46:53,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 399 transitions. [2022-07-19 21:46:53,787 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9545454545454546 [2022-07-19 21:46:53,788 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 399 transitions. [2022-07-19 21:46:53,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 399 transitions. [2022-07-19 21:46:53,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:53,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 399 transitions. [2022-07-19 21:46:53,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 199.5) internal successors, (399), 2 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:53,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:53,802 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:53,803 INFO L186 Difference]: Start difference. First operand has 187 places, 198 transitions, 408 flow. Second operand 2 states and 399 transitions. [2022-07-19 21:46:53,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 185 transitions, 390 flow [2022-07-19 21:46:53,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 185 transitions, 382 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:46:53,811 INFO L242 Difference]: Finished difference. Result has 184 places, 181 transitions, 366 flow [2022-07-19 21:46:53,812 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=366, PETRI_PLACES=184, PETRI_TRANSITIONS=181} [2022-07-19 21:46:53,817 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, -3 predicate places. [2022-07-19 21:46:53,818 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 181 transitions, 366 flow [2022-07-19 21:46:53,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 194.5) internal successors, (389), 2 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:53,819 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:53,819 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] [2022-07-19 21:46:53,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:46:53,820 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:53,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:53,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1212347192, now seen corresponding path program 1 times [2022-07-19 21:46:53,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:53,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829546497] [2022-07-19 21:46:53,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:53,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:53,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:54,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:54,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829546497] [2022-07-19 21:46:54,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829546497] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:46:54,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:46:54,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:46:54,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229034927] [2022-07-19 21:46:54,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:46:54,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:46:54,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:54,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:46:54,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:46:54,114 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 209 [2022-07-19 21:46:54,115 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 181 transitions, 366 flow. Second operand has 4 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:54,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:54,115 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 209 [2022-07-19 21:46:54,115 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:54,247 INFO L129 PetriNetUnfolder]: 158/765 cut-off events. [2022-07-19 21:46:54,247 INFO L130 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-07-19 21:46:54,250 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1039 conditions, 765 events. 158/765 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3811 event pairs, 36 based on Foata normal form. 0/644 useless extension candidates. Maximal degree in co-relation 1036. Up to 169 conditions per place. [2022-07-19 21:46:54,252 INFO L132 encePairwiseOnDemand]: 202/209 looper letters, 39 selfloop transitions, 7 changer transitions 0/202 dead transitions. [2022-07-19 21:46:54,252 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 202 transitions, 502 flow [2022-07-19 21:46:54,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:46:54,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:46:54,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 727 transitions. [2022-07-19 21:46:54,254 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8696172248803827 [2022-07-19 21:46:54,254 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 727 transitions. [2022-07-19 21:46:54,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 727 transitions. [2022-07-19 21:46:54,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:54,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 727 transitions. [2022-07-19 21:46:54,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 181.75) internal successors, (727), 4 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:54,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:54,259 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:54,259 INFO L186 Difference]: Start difference. First operand has 184 places, 181 transitions, 366 flow. Second operand 4 states and 727 transitions. [2022-07-19 21:46:54,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 202 transitions, 502 flow [2022-07-19 21:46:54,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 202 transitions, 502 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:46:54,265 INFO L242 Difference]: Finished difference. Result has 185 places, 187 transitions, 413 flow [2022-07-19 21:46:54,265 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=413, PETRI_PLACES=185, PETRI_TRANSITIONS=187} [2022-07-19 21:46:54,266 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, -2 predicate places. [2022-07-19 21:46:54,266 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 187 transitions, 413 flow [2022-07-19 21:46:54,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:54,267 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:54,267 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:46:54,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:46:54,268 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:54,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:54,270 INFO L85 PathProgramCache]: Analyzing trace with hash -123130560, now seen corresponding path program 1 times [2022-07-19 21:46:54,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:54,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56183582] [2022-07-19 21:46:54,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:54,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:54,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:54,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56183582] [2022-07-19 21:46:54,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56183582] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:46:54,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:46:54,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:46:54,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843686457] [2022-07-19 21:46:54,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:46:54,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:46:54,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:54,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:46:54,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:46:54,427 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 209 [2022-07-19 21:46:54,427 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 187 transitions, 413 flow. Second operand has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:54,428 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:54,428 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 209 [2022-07-19 21:46:54,428 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:54,705 INFO L129 PetriNetUnfolder]: 366/1796 cut-off events. [2022-07-19 21:46:54,705 INFO L130 PetriNetUnfolder]: For 193/195 co-relation queries the response was YES. [2022-07-19 21:46:54,708 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2737 conditions, 1796 events. 366/1796 cut-off events. For 193/195 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 13113 event pairs, 130 based on Foata normal form. 2/1652 useless extension candidates. Maximal degree in co-relation 2731. Up to 371 conditions per place. [2022-07-19 21:46:54,714 INFO L132 encePairwiseOnDemand]: 201/209 looper letters, 83 selfloop transitions, 7 changer transitions 0/243 dead transitions. [2022-07-19 21:46:54,714 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 243 transitions, 774 flow [2022-07-19 21:46:54,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:46:54,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:46:54,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1077 transitions. [2022-07-19 21:46:54,717 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8588516746411483 [2022-07-19 21:46:54,717 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1077 transitions. [2022-07-19 21:46:54,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1077 transitions. [2022-07-19 21:46:54,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:54,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1077 transitions. [2022-07-19 21:46:54,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 179.5) internal successors, (1077), 6 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:54,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 209.0) internal successors, (1463), 7 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:54,722 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 209.0) internal successors, (1463), 7 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:54,722 INFO L186 Difference]: Start difference. First operand has 185 places, 187 transitions, 413 flow. Second operand 6 states and 1077 transitions. [2022-07-19 21:46:54,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 243 transitions, 774 flow [2022-07-19 21:46:54,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 243 transitions, 774 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:46:54,730 INFO L242 Difference]: Finished difference. Result has 193 places, 191 transitions, 459 flow [2022-07-19 21:46:54,730 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=459, PETRI_PLACES=193, PETRI_TRANSITIONS=191} [2022-07-19 21:46:54,732 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 6 predicate places. [2022-07-19 21:46:54,732 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 191 transitions, 459 flow [2022-07-19 21:46:54,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:54,733 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:54,733 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:46:54,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:46:54,733 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:54,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:54,734 INFO L85 PathProgramCache]: Analyzing trace with hash 749567470, now seen corresponding path program 2 times [2022-07-19 21:46:54,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:54,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671871302] [2022-07-19 21:46:54,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:54,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:54,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:54,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671871302] [2022-07-19 21:46:54,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671871302] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:46:54,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:46:54,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:46:54,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079858170] [2022-07-19 21:46:54,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:46:54,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:46:54,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:54,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:46:54,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:46:54,916 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 209 [2022-07-19 21:46:54,917 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 191 transitions, 459 flow. Second operand has 6 states, 6 states have (on average 169.33333333333334) internal successors, (1016), 6 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:54,917 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:54,917 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 209 [2022-07-19 21:46:54,917 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:55,218 INFO L129 PetriNetUnfolder]: 407/2024 cut-off events. [2022-07-19 21:46:55,218 INFO L130 PetriNetUnfolder]: For 546/548 co-relation queries the response was YES. [2022-07-19 21:46:55,222 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3326 conditions, 2024 events. 407/2024 cut-off events. For 546/548 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 15253 event pairs, 184 based on Foata normal form. 10/1900 useless extension candidates. Maximal degree in co-relation 3316. Up to 407 conditions per place. [2022-07-19 21:46:55,227 INFO L132 encePairwiseOnDemand]: 201/209 looper letters, 71 selfloop transitions, 13 changer transitions 0/237 dead transitions. [2022-07-19 21:46:55,227 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 237 transitions, 791 flow [2022-07-19 21:46:55,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:46:55,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:46:55,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1244 transitions. [2022-07-19 21:46:55,230 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8503075871496925 [2022-07-19 21:46:55,230 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1244 transitions. [2022-07-19 21:46:55,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1244 transitions. [2022-07-19 21:46:55,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:55,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1244 transitions. [2022-07-19 21:46:55,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 177.71428571428572) internal successors, (1244), 7 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:55,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 209.0) internal successors, (1672), 8 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:55,235 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 209.0) internal successors, (1672), 8 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:55,235 INFO L186 Difference]: Start difference. First operand has 193 places, 191 transitions, 459 flow. Second operand 7 states and 1244 transitions. [2022-07-19 21:46:55,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 237 transitions, 791 flow [2022-07-19 21:46:55,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 237 transitions, 765 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-07-19 21:46:55,241 INFO L242 Difference]: Finished difference. Result has 202 places, 196 transitions, 534 flow [2022-07-19 21:46:55,241 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=534, PETRI_PLACES=202, PETRI_TRANSITIONS=196} [2022-07-19 21:46:55,241 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 15 predicate places. [2022-07-19 21:46:55,242 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 196 transitions, 534 flow [2022-07-19 21:46:55,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 169.33333333333334) internal successors, (1016), 6 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:55,242 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:55,242 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:46:55,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:46:55,243 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:55,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:55,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1940410436, now seen corresponding path program 3 times [2022-07-19 21:46:55,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:55,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792131869] [2022-07-19 21:46:55,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:55,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:55,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:55,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:55,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792131869] [2022-07-19 21:46:55,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792131869] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:46:55,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:46:55,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:46:55,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391740353] [2022-07-19 21:46:55,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:46:55,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:46:55,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:55,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:46:55,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:46:55,306 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 209 [2022-07-19 21:46:55,307 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 196 transitions, 534 flow. Second operand has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:55,307 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:55,307 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 209 [2022-07-19 21:46:55,307 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:55,577 INFO L129 PetriNetUnfolder]: 440/2219 cut-off events. [2022-07-19 21:46:55,577 INFO L130 PetriNetUnfolder]: For 1416/1428 co-relation queries the response was YES. [2022-07-19 21:46:55,582 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3946 conditions, 2219 events. 440/2219 cut-off events. For 1416/1428 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 17120 event pairs, 226 based on Foata normal form. 3/2051 useless extension candidates. Maximal degree in co-relation 3931. Up to 404 conditions per place. [2022-07-19 21:46:55,587 INFO L132 encePairwiseOnDemand]: 202/209 looper letters, 77 selfloop transitions, 16 changer transitions 0/246 dead transitions. [2022-07-19 21:46:55,587 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 246 transitions, 960 flow [2022-07-19 21:46:55,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:46:55,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:46:55,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 907 transitions. [2022-07-19 21:46:55,589 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8679425837320575 [2022-07-19 21:46:55,589 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 907 transitions. [2022-07-19 21:46:55,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 907 transitions. [2022-07-19 21:46:55,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:55,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 907 transitions. [2022-07-19 21:46:55,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 181.4) internal successors, (907), 5 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:55,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 209.0) internal successors, (1254), 6 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:55,593 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 209.0) internal successors, (1254), 6 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:55,593 INFO L186 Difference]: Start difference. First operand has 202 places, 196 transitions, 534 flow. Second operand 5 states and 907 transitions. [2022-07-19 21:46:55,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 246 transitions, 960 flow [2022-07-19 21:46:55,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 246 transitions, 949 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:46:55,601 INFO L242 Difference]: Finished difference. Result has 208 places, 204 transitions, 672 flow [2022-07-19 21:46:55,602 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=672, PETRI_PLACES=208, PETRI_TRANSITIONS=204} [2022-07-19 21:46:55,603 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 21 predicate places. [2022-07-19 21:46:55,604 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 204 transitions, 672 flow [2022-07-19 21:46:55,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:55,604 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:55,604 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:46:55,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:46:55,605 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:55,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:55,606 INFO L85 PathProgramCache]: Analyzing trace with hash 336336672, now seen corresponding path program 4 times [2022-07-19 21:46:55,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:55,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579685423] [2022-07-19 21:46:55,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:55,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:55,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:55,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579685423] [2022-07-19 21:46:55,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579685423] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:46:55,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:46:55,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:46:55,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791791609] [2022-07-19 21:46:55,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:46:55,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:46:55,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:55,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:46:55,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:46:55,778 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 209 [2022-07-19 21:46:55,779 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 204 transitions, 672 flow. Second operand has 6 states, 6 states have (on average 169.33333333333334) internal successors, (1016), 6 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:55,779 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:55,779 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 209 [2022-07-19 21:46:55,779 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:56,062 INFO L129 PetriNetUnfolder]: 449/2274 cut-off events. [2022-07-19 21:46:56,062 INFO L130 PetriNetUnfolder]: For 2385/2397 co-relation queries the response was YES. [2022-07-19 21:46:56,068 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4259 conditions, 2274 events. 449/2274 cut-off events. For 2385/2397 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 17766 event pairs, 232 based on Foata normal form. 9/2109 useless extension candidates. Maximal degree in co-relation 4241. Up to 409 conditions per place. [2022-07-19 21:46:56,075 INFO L132 encePairwiseOnDemand]: 202/209 looper letters, 78 selfloop transitions, 18 changer transitions 0/249 dead transitions. [2022-07-19 21:46:56,075 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 249 transitions, 1056 flow [2022-07-19 21:46:56,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:46:56,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:46:56,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1078 transitions. [2022-07-19 21:46:56,077 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8596491228070176 [2022-07-19 21:46:56,077 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1078 transitions. [2022-07-19 21:46:56,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1078 transitions. [2022-07-19 21:46:56,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:56,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1078 transitions. [2022-07-19 21:46:56,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 179.66666666666666) internal successors, (1078), 6 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:56,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 209.0) internal successors, (1463), 7 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:56,082 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 209.0) internal successors, (1463), 7 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:56,082 INFO L186 Difference]: Start difference. First operand has 208 places, 204 transitions, 672 flow. Second operand 6 states and 1078 transitions. [2022-07-19 21:46:56,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 249 transitions, 1056 flow [2022-07-19 21:46:56,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 249 transitions, 1029 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-07-19 21:46:56,089 INFO L242 Difference]: Finished difference. Result has 215 places, 207 transitions, 737 flow [2022-07-19 21:46:56,089 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=737, PETRI_PLACES=215, PETRI_TRANSITIONS=207} [2022-07-19 21:46:56,090 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 28 predicate places. [2022-07-19 21:46:56,090 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 207 transitions, 737 flow [2022-07-19 21:46:56,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 169.33333333333334) internal successors, (1016), 6 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:56,090 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:56,090 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:46:56,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:46:56,091 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:56,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:56,091 INFO L85 PathProgramCache]: Analyzing trace with hash -347218618, now seen corresponding path program 5 times [2022-07-19 21:46:56,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:56,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335424444] [2022-07-19 21:46:56,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:56,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:56,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:56,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:56,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335424444] [2022-07-19 21:46:56,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335424444] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:46:56,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:46:56,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:46:56,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814659040] [2022-07-19 21:46:56,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:46:56,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:46:56,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:56,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:46:56,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:46:56,146 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 209 [2022-07-19 21:46:56,147 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 207 transitions, 737 flow. Second operand has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:56,147 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:56,147 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 209 [2022-07-19 21:46:56,147 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:56,364 INFO L129 PetriNetUnfolder]: 447/2234 cut-off events. [2022-07-19 21:46:56,365 INFO L130 PetriNetUnfolder]: For 2688/2690 co-relation queries the response was YES. [2022-07-19 21:46:56,371 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4299 conditions, 2234 events. 447/2234 cut-off events. For 2688/2690 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 17350 event pairs, 243 based on Foata normal form. 4/2064 useless extension candidates. Maximal degree in co-relation 4278. Up to 584 conditions per place. [2022-07-19 21:46:56,377 INFO L132 encePairwiseOnDemand]: 202/209 looper letters, 63 selfloop transitions, 22 changer transitions 0/238 dead transitions. [2022-07-19 21:46:56,377 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 238 transitions, 1084 flow [2022-07-19 21:46:56,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:46:56,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:46:56,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 895 transitions. [2022-07-19 21:46:56,379 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8564593301435407 [2022-07-19 21:46:56,380 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 895 transitions. [2022-07-19 21:46:56,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 895 transitions. [2022-07-19 21:46:56,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:56,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 895 transitions. [2022-07-19 21:46:56,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:56,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 209.0) internal successors, (1254), 6 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:56,383 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 209.0) internal successors, (1254), 6 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:56,383 INFO L186 Difference]: Start difference. First operand has 215 places, 207 transitions, 737 flow. Second operand 5 states and 895 transitions. [2022-07-19 21:46:56,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 238 transitions, 1084 flow [2022-07-19 21:46:56,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 238 transitions, 1053 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-19 21:46:56,391 INFO L242 Difference]: Finished difference. Result has 220 places, 215 transitions, 880 flow [2022-07-19 21:46:56,391 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=880, PETRI_PLACES=220, PETRI_TRANSITIONS=215} [2022-07-19 21:46:56,392 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 33 predicate places. [2022-07-19 21:46:56,392 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 215 transitions, 880 flow [2022-07-19 21:46:56,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:56,392 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:56,392 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:46:56,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:46:56,393 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:56,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:56,393 INFO L85 PathProgramCache]: Analyzing trace with hash -780781578, now seen corresponding path program 6 times [2022-07-19 21:46:56,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:56,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129376128] [2022-07-19 21:46:56,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:56,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:56,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:56,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:56,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129376128] [2022-07-19 21:46:56,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129376128] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:46:56,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:46:56,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:46:56,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716924811] [2022-07-19 21:46:56,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:46:56,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:46:56,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:56,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:46:56,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:46:56,510 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 209 [2022-07-19 21:46:56,511 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 215 transitions, 880 flow. Second operand has 6 states, 6 states have (on average 169.33333333333334) internal successors, (1016), 6 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:56,511 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:56,511 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 209 [2022-07-19 21:46:56,511 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:56,752 INFO L129 PetriNetUnfolder]: 431/2167 cut-off events. [2022-07-19 21:46:56,753 INFO L130 PetriNetUnfolder]: For 3157/3159 co-relation queries the response was YES. [2022-07-19 21:46:56,760 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4237 conditions, 2167 events. 431/2167 cut-off events. For 3157/3159 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 16633 event pairs, 215 based on Foata normal form. 10/2014 useless extension candidates. Maximal degree in co-relation 4213. Up to 538 conditions per place. [2022-07-19 21:46:56,766 INFO L132 encePairwiseOnDemand]: 202/209 looper letters, 68 selfloop transitions, 24 changer transitions 0/245 dead transitions. [2022-07-19 21:46:56,766 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 245 transitions, 1176 flow [2022-07-19 21:46:56,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:46:56,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:46:56,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1070 transitions. [2022-07-19 21:46:56,769 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8532695374800638 [2022-07-19 21:46:56,769 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1070 transitions. [2022-07-19 21:46:56,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1070 transitions. [2022-07-19 21:46:56,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:56,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1070 transitions. [2022-07-19 21:46:56,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 178.33333333333334) internal successors, (1070), 6 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:56,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 209.0) internal successors, (1463), 7 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:56,773 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 209.0) internal successors, (1463), 7 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:56,773 INFO L186 Difference]: Start difference. First operand has 220 places, 215 transitions, 880 flow. Second operand 6 states and 1070 transitions. [2022-07-19 21:46:56,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 245 transitions, 1176 flow [2022-07-19 21:46:56,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 245 transitions, 1136 flow, removed 12 selfloop flow, removed 1 redundant places. [2022-07-19 21:46:56,782 INFO L242 Difference]: Finished difference. Result has 227 places, 218 transitions, 954 flow [2022-07-19 21:46:56,782 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=954, PETRI_PLACES=227, PETRI_TRANSITIONS=218} [2022-07-19 21:46:56,783 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 40 predicate places. [2022-07-19 21:46:56,783 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 218 transitions, 954 flow [2022-07-19 21:46:56,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 169.33333333333334) internal successors, (1016), 6 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:56,783 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:56,784 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] [2022-07-19 21:46:56,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:46:56,784 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:56,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:56,784 INFO L85 PathProgramCache]: Analyzing trace with hash -894123993, now seen corresponding path program 1 times [2022-07-19 21:46:56,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:56,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736402864] [2022-07-19 21:46:56,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:56,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:56,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:56,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:56,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736402864] [2022-07-19 21:46:56,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736402864] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:46:56,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840760559] [2022-07-19 21:46:56,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:56,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:56,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:46:56,913 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:46:56,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:46:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:56,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-19 21:46:56,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:46:57,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 21:46:57,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:57,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:46:57,534 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-19 21:46:57,534 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 [2022-07-19 21:46:57,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:57,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840760559] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:46:57,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:46:57,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 9] total 23 [2022-07-19 21:46:57,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063286949] [2022-07-19 21:46:57,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:46:57,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 21:46:57,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:57,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 21:46:57,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-07-19 21:46:57,608 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 209 [2022-07-19 21:46:57,610 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 218 transitions, 954 flow. Second operand has 23 states, 23 states have (on average 113.21739130434783) internal successors, (2604), 23 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:57,610 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:57,610 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 209 [2022-07-19 21:46:57,611 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:47:01,254 INFO L129 PetriNetUnfolder]: 7216/16942 cut-off events. [2022-07-19 21:47:01,254 INFO L130 PetriNetUnfolder]: For 21628/21628 co-relation queries the response was YES. [2022-07-19 21:47:01,304 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36786 conditions, 16942 events. 7216/16942 cut-off events. For 21628/21628 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 158233 event pairs, 476 based on Foata normal form. 33/16109 useless extension candidates. Maximal degree in co-relation 36759. Up to 3162 conditions per place. [2022-07-19 21:47:01,411 INFO L132 encePairwiseOnDemand]: 177/209 looper letters, 673 selfloop transitions, 139 changer transitions 8/916 dead transitions. [2022-07-19 21:47:01,412 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 916 transitions, 5579 flow [2022-07-19 21:47:01,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-19 21:47:01,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-19 21:47:01,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 6235 transitions. [2022-07-19 21:47:01,421 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5737026131762973 [2022-07-19 21:47:01,421 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 6235 transitions. [2022-07-19 21:47:01,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 6235 transitions. [2022-07-19 21:47:01,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:47:01,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 6235 transitions. [2022-07-19 21:47:01,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 119.90384615384616) internal successors, (6235), 52 states have internal predecessors, (6235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:01,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 209.0) internal successors, (11077), 53 states have internal predecessors, (11077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:01,452 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 209.0) internal successors, (11077), 53 states have internal predecessors, (11077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:01,452 INFO L186 Difference]: Start difference. First operand has 227 places, 218 transitions, 954 flow. Second operand 52 states and 6235 transitions. [2022-07-19 21:47:01,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 916 transitions, 5579 flow [2022-07-19 21:47:01,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 916 transitions, 5384 flow, removed 29 selfloop flow, removed 2 redundant places. [2022-07-19 21:47:01,507 INFO L242 Difference]: Finished difference. Result has 307 places, 361 transitions, 2051 flow [2022-07-19 21:47:01,508 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=2051, PETRI_PLACES=307, PETRI_TRANSITIONS=361} [2022-07-19 21:47:01,508 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 120 predicate places. [2022-07-19 21:47:01,509 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 361 transitions, 2051 flow [2022-07-19 21:47:01,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 113.21739130434783) internal successors, (2604), 23 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:01,510 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:47:01,510 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] [2022-07-19 21:47:01,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 21:47:01,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:47:01,724 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:47:01,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:47:01,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1707261297, now seen corresponding path program 2 times [2022-07-19 21:47:01,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:47:01,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827438896] [2022-07-19 21:47:01,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:01,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:47:01,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:01,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:47:01,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:47:01,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827438896] [2022-07-19 21:47:01,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827438896] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:47:01,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781251203] [2022-07-19 21:47:01,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:47:01,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:47:01,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:47:01,932 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:47:01,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:47:02,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-19 21:47:02,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:47:02,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:47:02,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:47:02,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:47:02,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:47:02,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781251203] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:47:02,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:47:02,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-07-19 21:47:02,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260733553] [2022-07-19 21:47:02,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:47:02,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:47:02,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:47:02,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:47:02,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:47:02,107 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 209 [2022-07-19 21:47:02,108 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 361 transitions, 2051 flow. Second operand has 8 states, 8 states have (on average 156.75) internal successors, (1254), 8 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:02,108 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:47:02,108 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 209 [2022-07-19 21:47:02,108 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:47:02,813 INFO L129 PetriNetUnfolder]: 504/4014 cut-off events. [2022-07-19 21:47:02,814 INFO L130 PetriNetUnfolder]: For 7289/7320 co-relation queries the response was YES. [2022-07-19 21:47:02,835 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8228 conditions, 4014 events. 504/4014 cut-off events. For 7289/7320 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 38744 event pairs, 130 based on Foata normal form. 5/3738 useless extension candidates. Maximal degree in co-relation 8170. Up to 388 conditions per place. [2022-07-19 21:47:02,846 INFO L132 encePairwiseOnDemand]: 197/209 looper letters, 31 selfloop transitions, 11 changer transitions 0/365 dead transitions. [2022-07-19 21:47:02,846 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 365 transitions, 2143 flow [2022-07-19 21:47:02,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:47:02,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-19 21:47:02,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1726 transitions. [2022-07-19 21:47:02,851 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.750761200521966 [2022-07-19 21:47:02,851 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1726 transitions. [2022-07-19 21:47:02,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1726 transitions. [2022-07-19 21:47:02,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:47:02,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1726 transitions. [2022-07-19 21:47:02,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 156.9090909090909) internal successors, (1726), 11 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:02,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 209.0) internal successors, (2508), 12 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:02,857 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 209.0) internal successors, (2508), 12 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:02,857 INFO L186 Difference]: Start difference. First operand has 307 places, 361 transitions, 2051 flow. Second operand 11 states and 1726 transitions. [2022-07-19 21:47:02,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 365 transitions, 2143 flow [2022-07-19 21:47:02,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 365 transitions, 2048 flow, removed 22 selfloop flow, removed 10 redundant places. [2022-07-19 21:47:02,896 INFO L242 Difference]: Finished difference. Result has 306 places, 362 transitions, 1986 flow [2022-07-19 21:47:02,897 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=1956, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1986, PETRI_PLACES=306, PETRI_TRANSITIONS=362} [2022-07-19 21:47:02,897 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 119 predicate places. [2022-07-19 21:47:02,897 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 362 transitions, 1986 flow [2022-07-19 21:47:02,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 156.75) internal successors, (1254), 8 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:02,898 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:47:02,898 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] [2022-07-19 21:47:02,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:47:03,115 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,SelfDestructingSolverStorable9 [2022-07-19 21:47:03,115 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:47:03,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:47:03,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1707571491, now seen corresponding path program 1 times [2022-07-19 21:47:03,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:47:03,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860624358] [2022-07-19 21:47:03,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:03,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:47:03,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:47:03,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:47:03,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860624358] [2022-07-19 21:47:03,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860624358] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:47:03,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436818423] [2022-07-19 21:47:03,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:03,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:47:03,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:47:03,308 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:47:03,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:47:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:03,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-19 21:47:03,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:47:03,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 21:47:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:47:03,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:47:03,811 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-19 21:47:03,812 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 [2022-07-19 21:47:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:47:03,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436818423] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:47:03,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:47:03,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 9] total 22 [2022-07-19 21:47:03,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818452062] [2022-07-19 21:47:03,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:47:03,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 21:47:03,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:47:03,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 21:47:03,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-07-19 21:47:03,895 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 209 [2022-07-19 21:47:03,896 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 362 transitions, 1986 flow. Second operand has 22 states, 22 states have (on average 113.31818181818181) internal successors, (2493), 22 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:03,896 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:47:03,896 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 209 [2022-07-19 21:47:03,897 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:47:08,131 INFO L129 PetriNetUnfolder]: 8412/19466 cut-off events. [2022-07-19 21:47:08,132 INFO L130 PetriNetUnfolder]: For 50835/50931 co-relation queries the response was YES. [2022-07-19 21:47:08,278 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55259 conditions, 19466 events. 8412/19466 cut-off events. For 50835/50931 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 184360 event pairs, 2047 based on Foata normal form. 71/18756 useless extension candidates. Maximal degree in co-relation 55202. Up to 7605 conditions per place. [2022-07-19 21:47:08,334 INFO L132 encePairwiseOnDemand]: 178/209 looper letters, 587 selfloop transitions, 207 changer transitions 4/895 dead transitions. [2022-07-19 21:47:08,334 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 895 transitions, 6766 flow [2022-07-19 21:47:08,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-19 21:47:08,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-19 21:47:08,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 7014 transitions. [2022-07-19 21:47:08,343 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.550160796925249 [2022-07-19 21:47:08,343 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 7014 transitions. [2022-07-19 21:47:08,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 7014 transitions. [2022-07-19 21:47:08,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:47:08,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 7014 transitions. [2022-07-19 21:47:08,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 114.98360655737704) internal successors, (7014), 61 states have internal predecessors, (7014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:08,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 209.0) internal successors, (12958), 62 states have internal predecessors, (12958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:08,395 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 209.0) internal successors, (12958), 62 states have internal predecessors, (12958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:08,395 INFO L186 Difference]: Start difference. First operand has 306 places, 362 transitions, 1986 flow. Second operand 61 states and 7014 transitions. [2022-07-19 21:47:08,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 895 transitions, 6766 flow [2022-07-19 21:47:08,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 895 transitions, 6746 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-07-19 21:47:08,612 INFO L242 Difference]: Finished difference. Result has 388 places, 524 transitions, 4361 flow [2022-07-19 21:47:08,612 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=1966, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=4361, PETRI_PLACES=388, PETRI_TRANSITIONS=524} [2022-07-19 21:47:08,613 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 201 predicate places. [2022-07-19 21:47:08,613 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 524 transitions, 4361 flow [2022-07-19 21:47:08,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 113.31818181818181) internal successors, (2493), 22 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:08,614 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:47:08,614 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] [2022-07-19 21:47:08,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 21:47:08,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:47:08,831 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:47:08,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:47:08,831 INFO L85 PathProgramCache]: Analyzing trace with hash -2081660607, now seen corresponding path program 2 times [2022-07-19 21:47:08,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:47:08,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557813389] [2022-07-19 21:47:08,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:08,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:47:08,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:47:09,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:47:09,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557813389] [2022-07-19 21:47:09,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557813389] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:47:09,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205622601] [2022-07-19 21:47:09,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:47:09,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:47:09,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:47:09,088 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:47:09,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:47:09,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-19 21:47:09,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:47:09,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:47:09,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:47:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:47:09,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:47:09,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205622601] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:47:09,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:47:09,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-07-19 21:47:09,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805297637] [2022-07-19 21:47:09,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:47:09,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:47:09,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:47:09,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:47:09,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-19 21:47:09,323 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 209 [2022-07-19 21:47:09,324 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 524 transitions, 4361 flow. Second operand has 6 states, 6 states have (on average 171.5) internal successors, (1029), 6 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:09,324 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:47:09,324 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 209 [2022-07-19 21:47:09,324 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:47:10,074 INFO L129 PetriNetUnfolder]: 934/4670 cut-off events. [2022-07-19 21:47:10,075 INFO L130 PetriNetUnfolder]: For 19726/19924 co-relation queries the response was YES. [2022-07-19 21:47:10,107 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13577 conditions, 4670 events. 934/4670 cut-off events. For 19726/19924 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 43860 event pairs, 176 based on Foata normal form. 100/4448 useless extension candidates. Maximal degree in co-relation 13489. Up to 610 conditions per place. [2022-07-19 21:47:10,120 INFO L132 encePairwiseOnDemand]: 201/209 looper letters, 81 selfloop transitions, 48 changer transitions 0/566 dead transitions. [2022-07-19 21:47:10,120 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 566 transitions, 4897 flow [2022-07-19 21:47:10,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:47:10,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:47:10,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1236 transitions. [2022-07-19 21:47:10,122 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8448393711551606 [2022-07-19 21:47:10,122 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1236 transitions. [2022-07-19 21:47:10,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1236 transitions. [2022-07-19 21:47:10,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:47:10,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1236 transitions. [2022-07-19 21:47:10,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 176.57142857142858) internal successors, (1236), 7 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:10,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 209.0) internal successors, (1672), 8 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:10,125 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 209.0) internal successors, (1672), 8 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:10,125 INFO L186 Difference]: Start difference. First operand has 388 places, 524 transitions, 4361 flow. Second operand 7 states and 1236 transitions. [2022-07-19 21:47:10,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 566 transitions, 4897 flow [2022-07-19 21:47:10,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 566 transitions, 4399 flow, removed 242 selfloop flow, removed 9 redundant places. [2022-07-19 21:47:10,236 INFO L242 Difference]: Finished difference. Result has 386 places, 527 transitions, 4003 flow [2022-07-19 21:47:10,237 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=3863, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4003, PETRI_PLACES=386, PETRI_TRANSITIONS=527} [2022-07-19 21:47:10,238 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 199 predicate places. [2022-07-19 21:47:10,238 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 527 transitions, 4003 flow [2022-07-19 21:47:10,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 171.5) internal successors, (1029), 6 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:10,239 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:47:10,239 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] [2022-07-19 21:47:10,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-19 21:47:10,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:47:10,457 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:47:10,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:47:10,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1917071363, now seen corresponding path program 1 times [2022-07-19 21:47:10,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:47:10,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84479360] [2022-07-19 21:47:10,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:10,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:47:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:10,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:47:10,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:47:10,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84479360] [2022-07-19 21:47:10,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84479360] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:47:10,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406906754] [2022-07-19 21:47:10,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:10,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:47:10,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:47:10,780 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:47:10,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:47:10,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:10,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 21:47:10,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:47:10,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:47:10,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:47:11,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:47:11,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406906754] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:47:11,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:47:11,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-07-19 21:47:11,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34510359] [2022-07-19 21:47:11,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:47:11,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 21:47:11,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:47:11,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 21:47:11,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-07-19 21:47:11,190 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 209 [2022-07-19 21:47:11,192 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 527 transitions, 4003 flow. Second operand has 23 states, 23 states have (on average 167.2608695652174) internal successors, (3847), 23 states have internal predecessors, (3847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:11,192 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:47:11,192 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 209 [2022-07-19 21:47:11,192 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:47:14,381 INFO L129 PetriNetUnfolder]: 1592/7088 cut-off events. [2022-07-19 21:47:14,381 INFO L130 PetriNetUnfolder]: For 30515/30573 co-relation queries the response was YES. [2022-07-19 21:47:14,451 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21759 conditions, 7088 events. 1592/7088 cut-off events. For 30515/30573 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 69437 event pairs, 229 based on Foata normal form. 79/6741 useless extension candidates. Maximal degree in co-relation 21669. Up to 466 conditions per place. [2022-07-19 21:47:14,475 INFO L132 encePairwiseOnDemand]: 191/209 looper letters, 309 selfloop transitions, 266 changer transitions 1/908 dead transitions. [2022-07-19 21:47:14,475 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 908 transitions, 7749 flow [2022-07-19 21:47:14,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-19 21:47:14,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-07-19 21:47:14,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 6925 transitions. [2022-07-19 21:47:14,483 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8283492822966507 [2022-07-19 21:47:14,483 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 6925 transitions. [2022-07-19 21:47:14,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 6925 transitions. [2022-07-19 21:47:14,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:47:14,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 6925 transitions. [2022-07-19 21:47:14,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 173.125) internal successors, (6925), 40 states have internal predecessors, (6925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:14,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 209.0) internal successors, (8569), 41 states have internal predecessors, (8569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:14,502 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 209.0) internal successors, (8569), 41 states have internal predecessors, (8569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:14,502 INFO L186 Difference]: Start difference. First operand has 386 places, 527 transitions, 4003 flow. Second operand 40 states and 6925 transitions. [2022-07-19 21:47:14,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 908 transitions, 7749 flow [2022-07-19 21:47:14,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 908 transitions, 7635 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:47:14,680 INFO L242 Difference]: Finished difference. Result has 450 places, 678 transitions, 6378 flow [2022-07-19 21:47:14,680 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=3956, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=6378, PETRI_PLACES=450, PETRI_TRANSITIONS=678} [2022-07-19 21:47:14,681 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 263 predicate places. [2022-07-19 21:47:14,681 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 678 transitions, 6378 flow [2022-07-19 21:47:14,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 167.2608695652174) internal successors, (3847), 23 states have internal predecessors, (3847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:14,682 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:47:14,682 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] [2022-07-19 21:47:14,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 21:47:14,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 21:47:14,896 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:47:14,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:47:14,896 INFO L85 PathProgramCache]: Analyzing trace with hash 529977865, now seen corresponding path program 2 times [2022-07-19 21:47:14,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:47:14,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167022032] [2022-07-19 21:47:14,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:14,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:47:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:47:15,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:47:15,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167022032] [2022-07-19 21:47:15,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167022032] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:47:15,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977305270] [2022-07-19 21:47:15,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:47:15,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:47:15,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:47:15,080 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:47:15,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:47:15,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:47:15,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:47:15,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 21:47:15,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:47:15,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:47:15,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:47:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:47:15,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977305270] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:47:15,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:47:15,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-07-19 21:47:15,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275156728] [2022-07-19 21:47:15,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:47:15,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:47:15,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:47:15,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:47:15,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:47:15,503 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 209 [2022-07-19 21:47:15,505 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 678 transitions, 6378 flow. Second operand has 19 states, 19 states have (on average 167.52631578947367) internal successors, (3183), 19 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:15,506 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:47:15,506 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 209 [2022-07-19 21:47:15,506 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:47:18,521 INFO L129 PetriNetUnfolder]: 2175/9674 cut-off events. [2022-07-19 21:47:18,521 INFO L130 PetriNetUnfolder]: For 69218/69318 co-relation queries the response was YES. [2022-07-19 21:47:18,662 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35866 conditions, 9674 events. 2175/9674 cut-off events. For 69218/69318 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 103511 event pairs, 432 based on Foata normal form. 66/9139 useless extension candidates. Maximal degree in co-relation 35750. Up to 1902 conditions per place. [2022-07-19 21:47:18,701 INFO L132 encePairwiseOnDemand]: 187/209 looper letters, 355 selfloop transitions, 356 changer transitions 6/1049 dead transitions. [2022-07-19 21:47:18,701 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 1049 transitions, 12303 flow [2022-07-19 21:47:18,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 21:47:18,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-19 21:47:18,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5183 transitions. [2022-07-19 21:47:18,706 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8266347687400319 [2022-07-19 21:47:18,706 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5183 transitions. [2022-07-19 21:47:18,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5183 transitions. [2022-07-19 21:47:18,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:47:18,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5183 transitions. [2022-07-19 21:47:18,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 172.76666666666668) internal successors, (5183), 30 states have internal predecessors, (5183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:18,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 209.0) internal successors, (6479), 31 states have internal predecessors, (6479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:18,717 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 209.0) internal successors, (6479), 31 states have internal predecessors, (6479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:18,718 INFO L186 Difference]: Start difference. First operand has 450 places, 678 transitions, 6378 flow. Second operand 30 states and 5183 transitions. [2022-07-19 21:47:18,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 1049 transitions, 12303 flow [2022-07-19 21:47:19,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 1049 transitions, 11524 flow, removed 297 selfloop flow, removed 6 redundant places. [2022-07-19 21:47:19,288 INFO L242 Difference]: Finished difference. Result has 488 places, 899 transitions, 10454 flow [2022-07-19 21:47:19,289 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=5928, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=10454, PETRI_PLACES=488, PETRI_TRANSITIONS=899} [2022-07-19 21:47:19,289 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 301 predicate places. [2022-07-19 21:47:19,290 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 899 transitions, 10454 flow [2022-07-19 21:47:19,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 167.52631578947367) internal successors, (3183), 19 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:19,290 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:47:19,291 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] [2022-07-19 21:47:19,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-19 21:47:19,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:47:19,503 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:47:19,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:47:19,504 INFO L85 PathProgramCache]: Analyzing trace with hash -936643847, now seen corresponding path program 1 times [2022-07-19 21:47:19,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:47:19,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402594000] [2022-07-19 21:47:19,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:19,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:47:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:47:19,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:47:19,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402594000] [2022-07-19 21:47:19,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402594000] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:47:19,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963911927] [2022-07-19 21:47:19,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:19,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:47:19,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:47:19,676 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:47:19,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:47:19,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:19,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-19 21:47:19,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:47:20,417 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-07-19 21:47:20,418 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 26 treesize of output 13 [2022-07-19 21:47:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:47:20,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:47:20,948 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:47:20,948 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 34 treesize of output 26 [2022-07-19 21:47:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:47:21,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963911927] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:47:21,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:47:21,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 21, 22] total 46 [2022-07-19 21:47:21,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886977205] [2022-07-19 21:47:21,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:47:21,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-19 21:47:21,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:47:21,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-19 21:47:21,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1892, Unknown=0, NotChecked=0, Total=2070 [2022-07-19 21:47:21,978 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 209 [2022-07-19 21:47:21,980 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 899 transitions, 10454 flow. Second operand has 46 states, 46 states have (on average 85.8695652173913) internal successors, (3950), 46 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:21,980 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:47:21,980 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 209 [2022-07-19 21:47:21,980 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:47:48,300 INFO L129 PetriNetUnfolder]: 27328/58132 cut-off events. [2022-07-19 21:47:48,301 INFO L130 PetriNetUnfolder]: For 433057/433749 co-relation queries the response was YES. [2022-07-19 21:47:50,187 INFO L84 FinitePrefix]: Finished finitePrefix Result has 222438 conditions, 58132 events. 27328/58132 cut-off events. For 433057/433749 co-relation queries the response was YES. Maximal size of possible extension queue 1398. Compared 637973 event pairs, 4954 based on Foata normal form. 433/55704 useless extension candidates. Maximal degree in co-relation 222312. Up to 22667 conditions per place. [2022-07-19 21:47:50,404 INFO L132 encePairwiseOnDemand]: 151/209 looper letters, 1641 selfloop transitions, 619 changer transitions 297/2763 dead transitions. [2022-07-19 21:47:50,405 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 662 places, 2763 transitions, 29146 flow [2022-07-19 21:47:50,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2022-07-19 21:47:50,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2022-07-19 21:47:50,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 15909 transitions. [2022-07-19 21:47:50,455 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4349692412850308 [2022-07-19 21:47:50,455 INFO L72 ComplementDD]: Start complementDD. Operand 175 states and 15909 transitions. [2022-07-19 21:47:50,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 175 states and 15909 transitions. [2022-07-19 21:47:50,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:47:50,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 175 states and 15909 transitions. [2022-07-19 21:47:50,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 176 states, 175 states have (on average 90.90857142857143) internal successors, (15909), 175 states have internal predecessors, (15909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:50,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 176 states, 176 states have (on average 209.0) internal successors, (36784), 176 states have internal predecessors, (36784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:50,569 INFO L81 ComplementDD]: Finished complementDD. Result has 176 states, 176 states have (on average 209.0) internal successors, (36784), 176 states have internal predecessors, (36784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:50,569 INFO L186 Difference]: Start difference. First operand has 488 places, 899 transitions, 10454 flow. Second operand 175 states and 15909 transitions. [2022-07-19 21:47:50,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 662 places, 2763 transitions, 29146 flow [2022-07-19 21:47:57,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 655 places, 2763 transitions, 27857 flow, removed 504 selfloop flow, removed 7 redundant places. [2022-07-19 21:47:57,599 INFO L242 Difference]: Finished difference. Result has 787 places, 1341 transitions, 15808 flow [2022-07-19 21:47:57,600 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=9748, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=899, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=175, PETRI_FLOW=15808, PETRI_PLACES=787, PETRI_TRANSITIONS=1341} [2022-07-19 21:47:57,600 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 600 predicate places. [2022-07-19 21:47:57,600 INFO L495 AbstractCegarLoop]: Abstraction has has 787 places, 1341 transitions, 15808 flow [2022-07-19 21:47:57,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 85.8695652173913) internal successors, (3950), 46 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:57,601 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:47:57,601 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] [2022-07-19 21:47:57,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 21:47:57,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:47:57,815 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:47:57,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:47:57,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1868961211, now seen corresponding path program 2 times [2022-07-19 21:47:57,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:47:57,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276523220] [2022-07-19 21:47:57,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:57,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:47:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:58,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:47:58,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:47:58,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276523220] [2022-07-19 21:47:58,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276523220] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:47:58,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50381513] [2022-07-19 21:47:58,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:47:58,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:47:58,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:47:58,020 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:47:58,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 21:47:58,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:47:58,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:47:58,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-19 21:47:58,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:47:58,928 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-07-19 21:47:58,929 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2022-07-19 21:47:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:47:59,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:47:59,256 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:47:59,256 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2022-07-19 21:48:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:00,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50381513] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:48:00,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:48:00,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 21, 21] total 46 [2022-07-19 21:48:00,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961604034] [2022-07-19 21:48:00,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:48:00,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-19 21:48:00,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:00,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-19 21:48:00,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1872, Unknown=0, NotChecked=0, Total=2070 [2022-07-19 21:48:00,062 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 209 [2022-07-19 21:48:00,063 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 787 places, 1341 transitions, 15808 flow. Second operand has 46 states, 46 states have (on average 85.8695652173913) internal successors, (3950), 46 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:48:00,063 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:00,064 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 209 [2022-07-19 21:48:00,064 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand