./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.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/popl20-nonblocking-cntr.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 c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:40:25,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:40:25,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:40:25,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:40:25,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:40:25,878 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:40:25,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:40:25,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:40:25,883 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:40:25,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:40:25,887 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:40:25,891 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:40:25,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:40:25,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:40:25,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:40:25,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:40:25,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:40:25,899 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:40:25,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:40:25,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:40:25,906 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:40:25,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:40:25,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:40:25,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:40:25,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:40:25,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:40:25,912 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:40:25,912 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:40:25,913 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:40:25,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:40:25,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:40:25,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:40:25,915 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:40:25,916 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:40:25,916 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:40:25,917 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:40:25,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:40:25,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:40:25,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:40:25,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:40:25,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:40:25,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:40:25,921 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:40:25,944 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:40:25,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:40:25,944 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:40:25,944 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:40:25,945 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:40:25,945 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:40:25,945 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:40:25,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:40:25,945 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:40:25,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:40:25,946 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:40:25,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:40:25,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:40:25,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:40:25,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:40:25,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:40:25,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:40:25,946 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:40:25,946 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:40:25,946 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:40:25,946 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:40:25,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:40:25,947 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:40:25,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:40:25,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:40:25,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:40:25,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:40:25,947 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:40:25,947 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:40:25,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:40:25,947 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:40:25,948 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:40:25,948 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:40:25,948 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f [2022-07-19 21:40:26,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:40:26,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:40:26,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:40:26,162 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:40:26,163 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:40:26,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2022-07-19 21:40:26,202 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efc50c6e6/b6bc579912654cce9b1b9669f375a15b/FLAGa0c0e03d1 [2022-07-19 21:40:26,574 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:40:26,575 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2022-07-19 21:40:26,583 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efc50c6e6/b6bc579912654cce9b1b9669f375a15b/FLAGa0c0e03d1 [2022-07-19 21:40:26,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efc50c6e6/b6bc579912654cce9b1b9669f375a15b [2022-07-19 21:40:26,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:40:26,594 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:40:26,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:40:26,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:40:26,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:40:26,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:40:26" (1/1) ... [2022-07-19 21:40:26,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c25c5ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:26, skipping insertion in model container [2022-07-19 21:40:26,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:40:26" (1/1) ... [2022-07-19 21:40:26,602 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:40:26,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:40:26,727 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-07-19 21:40:26,734 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:40:26,739 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:40:26,750 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-07-19 21:40:26,751 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:40:26,759 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:40:26,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:26 WrapperNode [2022-07-19 21:40:26,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:40:26,760 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:40:26,760 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:40:26,760 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:40:26,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:26" (1/1) ... [2022-07-19 21:40:26,769 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:26" (1/1) ... [2022-07-19 21:40:26,780 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-07-19 21:40:26,780 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:40:26,781 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:40:26,781 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:40:26,781 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:40:26,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:26" (1/1) ... [2022-07-19 21:40:26,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:26" (1/1) ... [2022-07-19 21:40:26,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:26" (1/1) ... [2022-07-19 21:40:26,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:26" (1/1) ... [2022-07-19 21:40:26,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:26" (1/1) ... [2022-07-19 21:40:26,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:26" (1/1) ... [2022-07-19 21:40:26,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:26" (1/1) ... [2022-07-19 21:40:26,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:40:26,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:40:26,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:40:26,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:40:26,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:26" (1/1) ... [2022-07-19 21:40:26,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:40:26,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:26,818 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 21:40:26,822 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 21:40:26,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:40:26,841 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:40:26,841 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:40:26,841 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:40:26,841 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:40:26,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:40:26,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:40:26,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:40:26,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:40:26,842 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:40:26,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:40:26,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:40:26,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:40:26,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:40:26,843 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 21:40:26,889 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:40:26,894 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:40:27,057 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:40:27,089 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:40:27,094 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 21:40:27,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:40:27 BoogieIcfgContainer [2022-07-19 21:40:27,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:40:27,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:40:27,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:40:27,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:40:27,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:40:26" (1/3) ... [2022-07-19 21:40:27,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd65e99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:40:27, skipping insertion in model container [2022-07-19 21:40:27,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:26" (2/3) ... [2022-07-19 21:40:27,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd65e99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:40:27, skipping insertion in model container [2022-07-19 21:40:27,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:40:27" (3/3) ... [2022-07-19 21:40:27,104 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2022-07-19 21:40:27,107 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:40:27,114 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:40:27,115 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:40:27,115 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:40:27,157 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:40:27,182 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 180 flow [2022-07-19 21:40:27,211 INFO L129 PetriNetUnfolder]: 6/80 cut-off events. [2022-07-19 21:40:27,211 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:40:27,214 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 6/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2022-07-19 21:40:27,214 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 180 flow [2022-07-19 21:40:27,217 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 154 flow [2022-07-19 21:40:27,225 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:40:27,230 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@512bcc0d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@682e6dc4 [2022-07-19 21:40:27,230 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 21:40:27,254 INFO L129 PetriNetUnfolder]: 6/70 cut-off events. [2022-07-19 21:40:27,254 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:40:27,255 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:27,255 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] [2022-07-19 21:40:27,256 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 21:40:27,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:27,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1829195169, now seen corresponding path program 1 times [2022-07-19 21:40:27,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:27,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332322680] [2022-07-19 21:40:27,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:27,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:27,481 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 21:40:27,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:27,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332322680] [2022-07-19 21:40:27,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332322680] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:40:27,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:40:27,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:40:27,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642267197] [2022-07-19 21:40:27,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:27,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:40:27,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:27,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:40:27,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:40:27,512 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 82 [2022-07-19 21:40:27,515 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 154 flow. Second operand has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 0 states 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 21:40:27,515 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:27,515 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 82 [2022-07-19 21:40:27,516 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:27,609 INFO L129 PetriNetUnfolder]: 64/185 cut-off events. [2022-07-19 21:40:27,609 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-19 21:40:27,611 INFO L84 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 185 events. 64/185 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 555 event pairs, 25 based on Foata normal form. 2/154 useless extension candidates. Maximal degree in co-relation 257. Up to 81 conditions per place. [2022-07-19 21:40:27,613 INFO L132 encePairwiseOnDemand]: 72/82 looper letters, 26 selfloop transitions, 5 changer transitions 2/75 dead transitions. [2022-07-19 21:40:27,616 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 75 transitions, 231 flow [2022-07-19 21:40:27,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:40:27,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:40:27,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 352 transitions. [2022-07-19 21:40:27,634 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7154471544715447 [2022-07-19 21:40:27,634 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 352 transitions. [2022-07-19 21:40:27,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 352 transitions. [2022-07-19 21:40:27,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:27,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 352 transitions. [2022-07-19 21:40:27,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 58.666666666666664) internal successors, (352), 6 states have internal predecessors, (352), 0 states have call successors, (0), 0 states 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 21:40:27,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states 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 21:40:27,654 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states 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 21:40:27,655 INFO L186 Difference]: Start difference. First operand has 72 places, 71 transitions, 154 flow. Second operand 6 states and 352 transitions. [2022-07-19 21:40:27,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 75 transitions, 231 flow [2022-07-19 21:40:27,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 75 transitions, 221 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:40:27,661 INFO L242 Difference]: Finished difference. Result has 74 places, 66 transitions, 152 flow [2022-07-19 21:40:27,662 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=74, PETRI_TRANSITIONS=66} [2022-07-19 21:40:27,665 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 2 predicate places. [2022-07-19 21:40:27,666 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 66 transitions, 152 flow [2022-07-19 21:40:27,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 0 states 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 21:40:27,668 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:27,668 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] [2022-07-19 21:40:27,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:40:27,669 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 21:40:27,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:27,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1831791135, now seen corresponding path program 1 times [2022-07-19 21:40:27,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:27,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983315939] [2022-07-19 21:40:27,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:27,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:27,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:27,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:27,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983315939] [2022-07-19 21:40:27,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983315939] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:40:27,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:40:27,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:40:27,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904884684] [2022-07-19 21:40:27,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:27,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:40:27,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:27,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:40:27,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:40:27,782 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2022-07-19 21:40:27,782 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 66 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states 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 21:40:27,782 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:27,782 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2022-07-19 21:40:27,783 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:27,921 INFO L129 PetriNetUnfolder]: 87/281 cut-off events. [2022-07-19 21:40:27,922 INFO L130 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-07-19 21:40:27,924 INFO L84 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 281 events. 87/281 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1072 event pairs, 39 based on Foata normal form. 1/254 useless extension candidates. Maximal degree in co-relation 358. Up to 113 conditions per place. [2022-07-19 21:40:27,926 INFO L132 encePairwiseOnDemand]: 75/82 looper letters, 32 selfloop transitions, 5 changer transitions 1/86 dead transitions. [2022-07-19 21:40:27,926 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 86 transitions, 291 flow [2022-07-19 21:40:27,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:40:27,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:40:27,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 396 transitions. [2022-07-19 21:40:27,929 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8048780487804879 [2022-07-19 21:40:27,929 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 396 transitions. [2022-07-19 21:40:27,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 396 transitions. [2022-07-19 21:40:27,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:27,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 396 transitions. [2022-07-19 21:40:27,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:27,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states 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 21:40:27,934 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states 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 21:40:27,934 INFO L186 Difference]: Start difference. First operand has 74 places, 66 transitions, 152 flow. Second operand 6 states and 396 transitions. [2022-07-19 21:40:27,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 86 transitions, 291 flow [2022-07-19 21:40:27,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 86 transitions, 279 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:40:27,938 INFO L242 Difference]: Finished difference. Result has 76 places, 68 transitions, 170 flow [2022-07-19 21:40:27,939 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2022-07-19 21:40:27,940 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2022-07-19 21:40:27,940 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 170 flow [2022-07-19 21:40:27,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states 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 21:40:27,940 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:27,940 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] [2022-07-19 21:40:27,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:40:27,941 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 21:40:27,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:27,942 INFO L85 PathProgramCache]: Analyzing trace with hash -188749577, now seen corresponding path program 2 times [2022-07-19 21:40:27,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:27,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077391843] [2022-07-19 21:40:27,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:27,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:27,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:28,039 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 21:40:28,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:28,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077391843] [2022-07-19 21:40:28,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077391843] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:28,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661498900] [2022-07-19 21:40:28,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:40:28,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:28,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:28,043 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 21:40:28,044 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 21:40:28,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-19 21:40:28,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:40:28,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 21:40:28,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:28,284 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 21:40:28,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:40:28,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661498900] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:40:28,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:40:28,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2022-07-19 21:40:28,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138385693] [2022-07-19 21:40:28,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:28,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:40:28,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:28,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:40:28,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-19 21:40:28,289 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 82 [2022-07-19 21:40:28,289 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states 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 21:40:28,289 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:28,290 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 82 [2022-07-19 21:40:28,291 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:28,415 INFO L129 PetriNetUnfolder]: 44/168 cut-off events. [2022-07-19 21:40:28,415 INFO L130 PetriNetUnfolder]: For 53/59 co-relation queries the response was YES. [2022-07-19 21:40:28,416 INFO L84 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 168 events. 44/168 cut-off events. For 53/59 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 540 event pairs, 21 based on Foata normal form. 13/176 useless extension candidates. Maximal degree in co-relation 298. Up to 66 conditions per place. [2022-07-19 21:40:28,417 INFO L132 encePairwiseOnDemand]: 74/82 looper letters, 20 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2022-07-19 21:40:28,417 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 72 transitions, 233 flow [2022-07-19 21:40:28,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:40:28,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:40:28,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 460 transitions. [2022-07-19 21:40:28,419 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7012195121951219 [2022-07-19 21:40:28,419 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 460 transitions. [2022-07-19 21:40:28,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 460 transitions. [2022-07-19 21:40:28,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:28,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 460 transitions. [2022-07-19 21:40:28,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 57.5) internal successors, (460), 8 states have internal predecessors, (460), 0 states have call successors, (0), 0 states 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 21:40:28,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 82.0) internal successors, (738), 9 states have internal predecessors, (738), 0 states have call successors, (0), 0 states 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 21:40:28,422 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 82.0) internal successors, (738), 9 states have internal predecessors, (738), 0 states have call successors, (0), 0 states 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 21:40:28,422 INFO L186 Difference]: Start difference. First operand has 76 places, 68 transitions, 170 flow. Second operand 8 states and 460 transitions. [2022-07-19 21:40:28,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 72 transitions, 233 flow [2022-07-19 21:40:28,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 72 transitions, 221 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-07-19 21:40:28,426 INFO L242 Difference]: Finished difference. Result has 77 places, 67 transitions, 168 flow [2022-07-19 21:40:28,426 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=168, PETRI_PLACES=77, PETRI_TRANSITIONS=67} [2022-07-19 21:40:28,428 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 5 predicate places. [2022-07-19 21:40:28,428 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 67 transitions, 168 flow [2022-07-19 21:40:28,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states 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 21:40:28,429 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:28,429 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] [2022-07-19 21:40:28,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:40:28,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:28,640 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 21:40:28,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:28,640 INFO L85 PathProgramCache]: Analyzing trace with hash 285176305, now seen corresponding path program 1 times [2022-07-19 21:40:28,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:28,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702774704] [2022-07-19 21:40:28,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:28,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:28,716 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 21:40:28,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:28,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702774704] [2022-07-19 21:40:28,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702774704] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:28,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591334117] [2022-07-19 21:40:28,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:28,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:28,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:28,720 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 21:40:28,722 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 21:40:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:28,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 21:40:28,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:28,885 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 21:40:28,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:40:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:29,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591334117] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:40:29,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:40:29,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 8 [2022-07-19 21:40:29,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139605527] [2022-07-19 21:40:29,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:40:29,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:40:29,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:29,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:40:29,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:40:29,188 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2022-07-19 21:40:29,189 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 67 transitions, 168 flow. Second operand has 8 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 0 states 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 21:40:29,189 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:29,189 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2022-07-19 21:40:29,189 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:29,249 INFO L129 PetriNetUnfolder]: 17/162 cut-off events. [2022-07-19 21:40:29,250 INFO L130 PetriNetUnfolder]: For 38/44 co-relation queries the response was YES. [2022-07-19 21:40:29,250 INFO L84 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 162 events. 17/162 cut-off events. For 38/44 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 422 event pairs, 1 based on Foata normal form. 4/164 useless extension candidates. Maximal degree in co-relation 109. Up to 21 conditions per place. [2022-07-19 21:40:29,251 INFO L132 encePairwiseOnDemand]: 76/82 looper letters, 25 selfloop transitions, 5 changer transitions 5/86 dead transitions. [2022-07-19 21:40:29,251 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 86 transitions, 302 flow [2022-07-19 21:40:29,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:40:29,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:40:29,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 393 transitions. [2022-07-19 21:40:29,252 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7987804878048781 [2022-07-19 21:40:29,252 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 393 transitions. [2022-07-19 21:40:29,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 393 transitions. [2022-07-19 21:40:29,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:29,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 393 transitions. [2022-07-19 21:40:29,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.5) internal successors, (393), 6 states have internal predecessors, (393), 0 states have call successors, (0), 0 states 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 21:40:29,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states 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 21:40:29,256 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states 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 21:40:29,256 INFO L186 Difference]: Start difference. First operand has 77 places, 67 transitions, 168 flow. Second operand 6 states and 393 transitions. [2022-07-19 21:40:29,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 86 transitions, 302 flow [2022-07-19 21:40:29,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 86 transitions, 279 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-19 21:40:29,260 INFO L242 Difference]: Finished difference. Result has 80 places, 71 transitions, 197 flow [2022-07-19 21:40:29,260 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=80, PETRI_TRANSITIONS=71} [2022-07-19 21:40:29,261 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 8 predicate places. [2022-07-19 21:40:29,262 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 71 transitions, 197 flow [2022-07-19 21:40:29,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 0 states 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 21:40:29,262 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:29,262 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] [2022-07-19 21:40:29,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 21:40:29,475 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,SelfDestructingSolverStorable3 [2022-07-19 21:40:29,476 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 21:40:29,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:29,476 INFO L85 PathProgramCache]: Analyzing trace with hash 343908841, now seen corresponding path program 2 times [2022-07-19 21:40:29,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:29,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631887995] [2022-07-19 21:40:29,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:29,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:29,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:29,544 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 21:40:29,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:29,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631887995] [2022-07-19 21:40:29,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631887995] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:29,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877645393] [2022-07-19 21:40:29,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:40:29,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:29,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:29,547 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 21:40:29,553 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 21:40:29,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:40:29,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:40:29,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 21:40:29,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:29,689 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 21:40:29,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:40:29,779 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 21:40:29,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877645393] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:40:29,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:40:29,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 10 [2022-07-19 21:40:29,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696810771] [2022-07-19 21:40:29,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:40:29,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:40:29,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:29,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:40:29,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:40:29,782 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 82 [2022-07-19 21:40:29,783 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 71 transitions, 197 flow. Second operand has 10 states, 10 states have (on average 64.2) internal successors, (642), 10 states have internal predecessors, (642), 0 states have call successors, (0), 0 states 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 21:40:29,783 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:29,783 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 82 [2022-07-19 21:40:29,783 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:29,867 INFO L129 PetriNetUnfolder]: 109/380 cut-off events. [2022-07-19 21:40:29,867 INFO L130 PetriNetUnfolder]: For 205/215 co-relation queries the response was YES. [2022-07-19 21:40:29,868 INFO L84 FinitePrefix]: Finished finitePrefix Result has 837 conditions, 380 events. 109/380 cut-off events. For 205/215 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1810 event pairs, 27 based on Foata normal form. 15/388 useless extension candidates. Maximal degree in co-relation 820. Up to 124 conditions per place. [2022-07-19 21:40:29,870 INFO L132 encePairwiseOnDemand]: 76/82 looper letters, 34 selfloop transitions, 15 changer transitions 0/99 dead transitions. [2022-07-19 21:40:29,870 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 99 transitions, 414 flow [2022-07-19 21:40:29,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:40:29,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:40:29,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 466 transitions. [2022-07-19 21:40:29,871 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8118466898954704 [2022-07-19 21:40:29,871 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 466 transitions. [2022-07-19 21:40:29,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 466 transitions. [2022-07-19 21:40:29,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:29,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 466 transitions. [2022-07-19 21:40:29,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 0 states have call successors, (0), 0 states 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 21:40:29,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 0 states 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 21:40:29,873 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 0 states 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 21:40:29,873 INFO L186 Difference]: Start difference. First operand has 80 places, 71 transitions, 197 flow. Second operand 7 states and 466 transitions. [2022-07-19 21:40:29,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 99 transitions, 414 flow [2022-07-19 21:40:29,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 99 transitions, 410 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-19 21:40:29,876 INFO L242 Difference]: Finished difference. Result has 87 places, 84 transitions, 338 flow [2022-07-19 21:40:29,876 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=338, PETRI_PLACES=87, PETRI_TRANSITIONS=84} [2022-07-19 21:40:29,876 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 15 predicate places. [2022-07-19 21:40:29,877 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 84 transitions, 338 flow [2022-07-19 21:40:29,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 64.2) internal successors, (642), 10 states have internal predecessors, (642), 0 states have call successors, (0), 0 states 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 21:40:29,877 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:29,877 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:29,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:40:30,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:30,092 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 21:40:30,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:30,092 INFO L85 PathProgramCache]: Analyzing trace with hash 788007917, now seen corresponding path program 3 times [2022-07-19 21:40:30,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:30,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956121476] [2022-07-19 21:40:30,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:30,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:30,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:30,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956121476] [2022-07-19 21:40:30,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956121476] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:30,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548896004] [2022-07-19 21:40:30,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:40:30,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:30,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:30,208 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 21:40:30,209 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 21:40:30,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 21:40:30,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:40:30,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:40:30,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:30,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:30,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:40:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:30,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548896004] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:40:30,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:40:30,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 20 [2022-07-19 21:40:30,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733593987] [2022-07-19 21:40:30,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:40:30,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 21:40:30,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:30,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 21:40:30,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-07-19 21:40:30,448 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-19 21:40:30,449 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 84 transitions, 338 flow. Second operand has 20 states, 20 states have (on average 59.9) internal successors, (1198), 20 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states 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 21:40:30,449 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:30,449 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-19 21:40:30,449 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:31,467 INFO L129 PetriNetUnfolder]: 312/856 cut-off events. [2022-07-19 21:40:31,468 INFO L130 PetriNetUnfolder]: For 1304/1304 co-relation queries the response was YES. [2022-07-19 21:40:31,470 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2539 conditions, 856 events. 312/856 cut-off events. For 1304/1304 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4684 event pairs, 12 based on Foata normal form. 29/884 useless extension candidates. Maximal degree in co-relation 2047. Up to 168 conditions per place. [2022-07-19 21:40:31,473 INFO L132 encePairwiseOnDemand]: 69/82 looper letters, 117 selfloop transitions, 134 changer transitions 11/307 dead transitions. [2022-07-19 21:40:31,473 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 307 transitions, 1960 flow [2022-07-19 21:40:31,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-19 21:40:31,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-07-19 21:40:31,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3368 transitions. [2022-07-19 21:40:31,479 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7467849223946785 [2022-07-19 21:40:31,479 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3368 transitions. [2022-07-19 21:40:31,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3368 transitions. [2022-07-19 21:40:31,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:31,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3368 transitions. [2022-07-19 21:40:31,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 61.236363636363635) internal successors, (3368), 55 states have internal predecessors, (3368), 0 states have call successors, (0), 0 states 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 21:40:31,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 82.0) internal successors, (4592), 56 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states 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 21:40:31,495 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 82.0) internal successors, (4592), 56 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states 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 21:40:31,495 INFO L186 Difference]: Start difference. First operand has 87 places, 84 transitions, 338 flow. Second operand 55 states and 3368 transitions. [2022-07-19 21:40:31,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 307 transitions, 1960 flow [2022-07-19 21:40:31,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 307 transitions, 1952 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-07-19 21:40:31,507 INFO L242 Difference]: Finished difference. Result has 153 places, 206 transitions, 1422 flow [2022-07-19 21:40:31,508 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=1422, PETRI_PLACES=153, PETRI_TRANSITIONS=206} [2022-07-19 21:40:31,509 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 81 predicate places. [2022-07-19 21:40:31,510 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 206 transitions, 1422 flow [2022-07-19 21:40:31,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 59.9) internal successors, (1198), 20 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states 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 21:40:31,510 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:31,510 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:31,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:40:31,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:31,723 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 21:40:31,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:31,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1695977387, now seen corresponding path program 4 times [2022-07-19 21:40:31,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:31,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624112880] [2022-07-19 21:40:31,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:31,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:31,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:31,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624112880] [2022-07-19 21:40:31,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624112880] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:31,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164690928] [2022-07-19 21:40:31,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:40:31,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:31,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:31,842 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 21:40:31,843 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 21:40:31,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:40:31,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:40:31,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 21:40:31,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:32,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:32,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:40:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:32,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164690928] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:40:32,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:40:32,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2022-07-19 21:40:32,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137919702] [2022-07-19 21:40:32,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:40:32,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 21:40:32,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:32,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 21:40:32,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-07-19 21:40:32,247 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-19 21:40:32,248 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 206 transitions, 1422 flow. Second operand has 26 states, 26 states have (on average 59.61538461538461) internal successors, (1550), 26 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states 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 21:40:32,248 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:32,248 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-19 21:40:32,248 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:33,504 INFO L129 PetriNetUnfolder]: 789/2284 cut-off events. [2022-07-19 21:40:33,505 INFO L130 PetriNetUnfolder]: For 7863/7863 co-relation queries the response was YES. [2022-07-19 21:40:33,511 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8783 conditions, 2284 events. 789/2284 cut-off events. For 7863/7863 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 17196 event pairs, 50 based on Foata normal form. 124/2400 useless extension candidates. Maximal degree in co-relation 8060. Up to 444 conditions per place. [2022-07-19 21:40:33,520 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 312 selfloop transitions, 334 changer transitions 21/712 dead transitions. [2022-07-19 21:40:33,520 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 712 transitions, 6678 flow [2022-07-19 21:40:33,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-19 21:40:33,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-19 21:40:33,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3772 transitions. [2022-07-19 21:40:33,526 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7540983606557377 [2022-07-19 21:40:33,526 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3772 transitions. [2022-07-19 21:40:33,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3772 transitions. [2022-07-19 21:40:33,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:33,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3772 transitions. [2022-07-19 21:40:33,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 61.83606557377049) internal successors, (3772), 61 states have internal predecessors, (3772), 0 states have call successors, (0), 0 states 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 21:40:33,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states 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 21:40:33,544 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states 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 21:40:33,544 INFO L186 Difference]: Start difference. First operand has 153 places, 206 transitions, 1422 flow. Second operand 61 states and 3772 transitions. [2022-07-19 21:40:33,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 712 transitions, 6678 flow [2022-07-19 21:40:33,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 712 transitions, 6187 flow, removed 216 selfloop flow, removed 6 redundant places. [2022-07-19 21:40:33,579 INFO L242 Difference]: Finished difference. Result has 237 places, 492 transitions, 4915 flow [2022-07-19 21:40:33,580 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=4915, PETRI_PLACES=237, PETRI_TRANSITIONS=492} [2022-07-19 21:40:33,580 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 165 predicate places. [2022-07-19 21:40:33,581 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 492 transitions, 4915 flow [2022-07-19 21:40:33,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 59.61538461538461) internal successors, (1550), 26 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states 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 21:40:33,581 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:33,581 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:33,619 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 21:40:33,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:33,796 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 21:40:33,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:33,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1062102969, now seen corresponding path program 5 times [2022-07-19 21:40:33,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:33,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776810479] [2022-07-19 21:40:33,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:33,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:33,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:33,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:33,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776810479] [2022-07-19 21:40:33,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776810479] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:33,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252537237] [2022-07-19 21:40:33,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:40:33,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:33,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:33,900 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 21:40:33,902 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 21:40:33,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-19 21:40:33,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:40:33,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 21:40:33,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:34,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:34,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:40:34,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:34,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252537237] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:40:34,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:40:34,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2022-07-19 21:40:34,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776866752] [2022-07-19 21:40:34,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:40:34,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 21:40:34,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:34,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 21:40:34,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-07-19 21:40:34,281 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-19 21:40:34,282 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 492 transitions, 4915 flow. Second operand has 25 states, 25 states have (on average 59.68) internal successors, (1492), 25 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states 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 21:40:34,282 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:34,282 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-19 21:40:34,282 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:35,267 INFO L129 PetriNetUnfolder]: 962/2727 cut-off events. [2022-07-19 21:40:35,268 INFO L130 PetriNetUnfolder]: For 23134/23134 co-relation queries the response was YES. [2022-07-19 21:40:35,281 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14524 conditions, 2727 events. 962/2727 cut-off events. For 23134/23134 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 21657 event pairs, 22 based on Foata normal form. 33/2750 useless extension candidates. Maximal degree in co-relation 13882. Up to 512 conditions per place. [2022-07-19 21:40:35,295 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 183 selfloop transitions, 511 changer transitions 7/746 dead transitions. [2022-07-19 21:40:35,295 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 746 transitions, 9027 flow [2022-07-19 21:40:35,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-19 21:40:35,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-19 21:40:35,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2387 transitions. [2022-07-19 21:40:35,298 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7464040025015635 [2022-07-19 21:40:35,298 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2387 transitions. [2022-07-19 21:40:35,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2387 transitions. [2022-07-19 21:40:35,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:35,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2387 transitions. [2022-07-19 21:40:35,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 61.205128205128204) internal successors, (2387), 39 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states 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 21:40:35,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 82.0) internal successors, (3280), 40 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states 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 21:40:35,338 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 82.0) internal successors, (3280), 40 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states 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 21:40:35,338 INFO L186 Difference]: Start difference. First operand has 237 places, 492 transitions, 4915 flow. Second operand 39 states and 2387 transitions. [2022-07-19 21:40:35,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 746 transitions, 9027 flow [2022-07-19 21:40:35,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 746 transitions, 8707 flow, removed 157 selfloop flow, removed 3 redundant places. [2022-07-19 21:40:35,439 INFO L242 Difference]: Finished difference. Result has 286 places, 646 transitions, 8206 flow [2022-07-19 21:40:35,440 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=4737, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=8206, PETRI_PLACES=286, PETRI_TRANSITIONS=646} [2022-07-19 21:40:35,441 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 214 predicate places. [2022-07-19 21:40:35,441 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 646 transitions, 8206 flow [2022-07-19 21:40:35,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 59.68) internal successors, (1492), 25 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states 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 21:40:35,442 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:35,442 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:35,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 21:40:35,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:35,655 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 21:40:35,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:35,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1632526143, now seen corresponding path program 6 times [2022-07-19 21:40:35,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:35,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455516078] [2022-07-19 21:40:35,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:35,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:35,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:35,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:35,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455516078] [2022-07-19 21:40:35,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455516078] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:35,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777522736] [2022-07-19 21:40:35,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:40:35,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:35,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:35,732 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 21:40:35,733 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 21:40:35,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-19 21:40:35,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:40:35,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:40:35,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:35,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:35,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:40:36,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:36,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777522736] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:40:36,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:40:36,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-07-19 21:40:36,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194287336] [2022-07-19 21:40:36,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:40:36,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 21:40:36,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:36,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 21:40:36,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-07-19 21:40:36,029 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-19 21:40:36,030 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 646 transitions, 8206 flow. Second operand has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states 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 21:40:36,030 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:36,030 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-19 21:40:36,030 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:37,857 INFO L129 PetriNetUnfolder]: 1247/3668 cut-off events. [2022-07-19 21:40:37,858 INFO L130 PetriNetUnfolder]: For 46784/46784 co-relation queries the response was YES. [2022-07-19 21:40:37,880 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22547 conditions, 3668 events. 1247/3668 cut-off events. For 46784/46784 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 31698 event pairs, 60 based on Foata normal form. 38/3674 useless extension candidates. Maximal degree in co-relation 21679. Up to 626 conditions per place. [2022-07-19 21:40:37,905 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 256 selfloop transitions, 795 changer transitions 9/1105 dead transitions. [2022-07-19 21:40:37,906 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 1105 transitions, 16324 flow [2022-07-19 21:40:37,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-19 21:40:37,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-07-19 21:40:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4397 transitions. [2022-07-19 21:40:37,916 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7447493224932249 [2022-07-19 21:40:37,916 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4397 transitions. [2022-07-19 21:40:37,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4397 transitions. [2022-07-19 21:40:37,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:37,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4397 transitions. [2022-07-19 21:40:37,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 61.06944444444444) internal successors, (4397), 72 states have internal predecessors, (4397), 0 states have call successors, (0), 0 states 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 21:40:37,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 82.0) internal successors, (5986), 73 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states 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 21:40:37,941 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 82.0) internal successors, (5986), 73 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states 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 21:40:37,941 INFO L186 Difference]: Start difference. First operand has 286 places, 646 transitions, 8206 flow. Second operand 72 states and 4397 transitions. [2022-07-19 21:40:37,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 1105 transitions, 16324 flow [2022-07-19 21:40:38,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 1105 transitions, 15317 flow, removed 156 selfloop flow, removed 19 redundant places. [2022-07-19 21:40:38,154 INFO L242 Difference]: Finished difference. Result has 368 places, 944 transitions, 14092 flow [2022-07-19 21:40:38,154 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=7528, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=510, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=14092, PETRI_PLACES=368, PETRI_TRANSITIONS=944} [2022-07-19 21:40:38,155 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 296 predicate places. [2022-07-19 21:40:38,155 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 944 transitions, 14092 flow [2022-07-19 21:40:38,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states 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 21:40:38,156 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:38,156 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:38,172 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 21:40:38,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:38,359 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 21:40:38,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:38,360 INFO L85 PathProgramCache]: Analyzing trace with hash -925173425, now seen corresponding path program 7 times [2022-07-19 21:40:38,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:38,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243765037] [2022-07-19 21:40:38,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:38,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:38,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:38,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243765037] [2022-07-19 21:40:38,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243765037] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:38,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667252119] [2022-07-19 21:40:38,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 21:40:38,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:38,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:38,438 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 21:40:38,439 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 21:40:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:38,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:40:38,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:38,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:40:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:38,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667252119] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:40:38,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:40:38,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-07-19 21:40:38,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439494168] [2022-07-19 21:40:38,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:40:38,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 21:40:38,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:38,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 21:40:38,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-07-19 21:40:38,740 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-19 21:40:38,741 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 944 transitions, 14092 flow. Second operand has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states 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 21:40:38,741 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:38,741 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-19 21:40:38,741 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:40,331 INFO L129 PetriNetUnfolder]: 1335/3958 cut-off events. [2022-07-19 21:40:40,331 INFO L130 PetriNetUnfolder]: For 65581/65581 co-relation queries the response was YES. [2022-07-19 21:40:40,356 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27395 conditions, 3958 events. 1335/3958 cut-off events. For 65581/65581 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 35053 event pairs, 32 based on Foata normal form. 2/3950 useless extension candidates. Maximal degree in co-relation 26336. Up to 674 conditions per place. [2022-07-19 21:40:40,373 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 381 selfloop transitions, 755 changer transitions 35/1216 dead transitions. [2022-07-19 21:40:40,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 1216 transitions, 21058 flow [2022-07-19 21:40:40,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-19 21:40:40,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-07-19 21:40:40,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2515 transitions. [2022-07-19 21:40:40,375 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7480666270077335 [2022-07-19 21:40:40,375 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2515 transitions. [2022-07-19 21:40:40,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2515 transitions. [2022-07-19 21:40:40,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:40,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2515 transitions. [2022-07-19 21:40:40,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 61.34146341463415) internal successors, (2515), 41 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states 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 21:40:40,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states 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 21:40:40,382 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states 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 21:40:40,382 INFO L186 Difference]: Start difference. First operand has 368 places, 944 transitions, 14092 flow. Second operand 41 states and 2515 transitions. [2022-07-19 21:40:40,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 1216 transitions, 21058 flow [2022-07-19 21:40:40,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 1216 transitions, 20576 flow, removed 170 selfloop flow, removed 22 redundant places. [2022-07-19 21:40:40,813 INFO L242 Difference]: Finished difference. Result has 394 places, 1064 transitions, 17945 flow [2022-07-19 21:40:40,814 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=13588, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=633, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=17945, PETRI_PLACES=394, PETRI_TRANSITIONS=1064} [2022-07-19 21:40:40,814 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 322 predicate places. [2022-07-19 21:40:40,814 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 1064 transitions, 17945 flow [2022-07-19 21:40:40,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states 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 21:40:40,815 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:40,815 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:40,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 21:40:41,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 21:40:41,016 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 21:40:41,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:41,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1862553847, now seen corresponding path program 8 times [2022-07-19 21:40:41,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:41,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575233810] [2022-07-19 21:40:41,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:41,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:41,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:41,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:41,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575233810] [2022-07-19 21:40:41,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575233810] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:41,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886992506] [2022-07-19 21:40:41,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:40:41,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:41,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:41,086 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:40:41,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 21:40:41,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:40:41,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:40:41,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:40:41,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:41,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:41,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:40:41,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:41,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886992506] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:40:41,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:40:41,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-07-19 21:40:41,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365730925] [2022-07-19 21:40:41,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:40:41,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 21:40:41,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:41,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 21:40:41,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-07-19 21:40:41,392 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-19 21:40:41,392 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 1064 transitions, 17945 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states 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 21:40:41,393 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:41,393 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-19 21:40:41,393 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:43,976 INFO L129 PetriNetUnfolder]: 1748/5156 cut-off events. [2022-07-19 21:40:43,976 INFO L130 PetriNetUnfolder]: For 94133/94133 co-relation queries the response was YES. [2022-07-19 21:40:44,012 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38289 conditions, 5156 events. 1748/5156 cut-off events. For 94133/94133 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 48232 event pairs, 75 based on Foata normal form. 43/5163 useless extension candidates. Maximal degree in co-relation 37018. Up to 927 conditions per place. [2022-07-19 21:40:44,035 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 338 selfloop transitions, 1244 changer transitions 3/1630 dead transitions. [2022-07-19 21:40:44,035 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 1630 transitions, 30624 flow [2022-07-19 21:40:44,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-19 21:40:44,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-07-19 21:40:44,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3837 transitions. [2022-07-19 21:40:44,039 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7427409988385598 [2022-07-19 21:40:44,039 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3837 transitions. [2022-07-19 21:40:44,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3837 transitions. [2022-07-19 21:40:44,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:44,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3837 transitions. [2022-07-19 21:40:44,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 60.904761904761905) internal successors, (3837), 63 states have internal predecessors, (3837), 0 states have call successors, (0), 0 states 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 21:40:44,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 82.0) internal successors, (5248), 64 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states 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 21:40:44,047 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 82.0) internal successors, (5248), 64 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states 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 21:40:44,048 INFO L186 Difference]: Start difference. First operand has 394 places, 1064 transitions, 17945 flow. Second operand 63 states and 3837 transitions. [2022-07-19 21:40:44,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 1630 transitions, 30624 flow [2022-07-19 21:40:44,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 1630 transitions, 29455 flow, removed 187 selfloop flow, removed 21 redundant places. [2022-07-19 21:40:44,743 INFO L242 Difference]: Finished difference. Result has 454 places, 1485 transitions, 28896 flow [2022-07-19 21:40:44,744 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=17203, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1064, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=832, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=28896, PETRI_PLACES=454, PETRI_TRANSITIONS=1485} [2022-07-19 21:40:44,745 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 382 predicate places. [2022-07-19 21:40:44,745 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 1485 transitions, 28896 flow [2022-07-19 21:40:44,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states 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 21:40:44,745 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:44,745 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:44,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 21:40:44,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:44,959 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 21:40:44,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:44,960 INFO L85 PathProgramCache]: Analyzing trace with hash -167169759, now seen corresponding path program 9 times [2022-07-19 21:40:44,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:44,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402650820] [2022-07-19 21:40:44,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:44,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:45,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:45,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402650820] [2022-07-19 21:40:45,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402650820] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:45,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183326824] [2022-07-19 21:40:45,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:40:45,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:45,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:45,033 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:40:45,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 21:40:45,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 21:40:45,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:40:45,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:40:45,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:45,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:40:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:45,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183326824] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:40:45,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:40:45,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-07-19 21:40:45,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214946917] [2022-07-19 21:40:45,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:40:45,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 21:40:45,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:45,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 21:40:45,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-07-19 21:40:45,290 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-19 21:40:45,291 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 1485 transitions, 28896 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states 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 21:40:45,291 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:45,291 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-19 21:40:45,291 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:47,930 INFO L129 PetriNetUnfolder]: 1760/5259 cut-off events. [2022-07-19 21:40:47,931 INFO L130 PetriNetUnfolder]: For 117980/117980 co-relation queries the response was YES. [2022-07-19 21:40:47,977 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42899 conditions, 5259 events. 1760/5259 cut-off events. For 117980/117980 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 49672 event pairs, 86 based on Foata normal form. 4/5220 useless extension candidates. Maximal degree in co-relation 42709. Up to 898 conditions per place. [2022-07-19 21:40:48,005 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 539 selfloop transitions, 1041 changer transitions 14/1639 dead transitions. [2022-07-19 21:40:48,005 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1639 transitions, 34707 flow [2022-07-19 21:40:48,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-19 21:40:48,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-07-19 21:40:48,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2525 transitions. [2022-07-19 21:40:48,007 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7510410469958358 [2022-07-19 21:40:48,008 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2525 transitions. [2022-07-19 21:40:48,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2525 transitions. [2022-07-19 21:40:48,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:48,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2525 transitions. [2022-07-19 21:40:48,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 61.58536585365854) internal successors, (2525), 41 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states 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 21:40:48,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states 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 21:40:48,013 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states 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 21:40:48,013 INFO L186 Difference]: Start difference. First operand has 454 places, 1485 transitions, 28896 flow. Second operand 41 states and 2525 transitions. [2022-07-19 21:40:48,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1639 transitions, 34707 flow [2022-07-19 21:40:49,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 1639 transitions, 34281 flow, removed 134 selfloop flow, removed 25 redundant places. [2022-07-19 21:40:49,097 INFO L242 Difference]: Finished difference. Result has 476 places, 1521 transitions, 31685 flow [2022-07-19 21:40:49,098 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=28476, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1006, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=31685, PETRI_PLACES=476, PETRI_TRANSITIONS=1521} [2022-07-19 21:40:49,099 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 404 predicate places. [2022-07-19 21:40:49,099 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 1521 transitions, 31685 flow [2022-07-19 21:40:49,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states 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 21:40:49,099 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:49,099 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:49,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 21:40:49,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 21:40:49,300 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 21:40:49,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:49,301 INFO L85 PathProgramCache]: Analyzing trace with hash -949462277, now seen corresponding path program 10 times [2022-07-19 21:40:49,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:49,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072853006] [2022-07-19 21:40:49,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:49,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:49,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:49,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072853006] [2022-07-19 21:40:49,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072853006] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:49,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495151707] [2022-07-19 21:40:49,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:40:49,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:49,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:49,375 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:40:49,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 21:40:49,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:40:49,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:40:49,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:40:49,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:49,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:49,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:40:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:49,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495151707] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:40:49,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:40:49,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-07-19 21:40:49,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468538213] [2022-07-19 21:40:49,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:40:49,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 21:40:49,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:49,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 21:40:49,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-07-19 21:40:49,676 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-19 21:40:49,677 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 1521 transitions, 31685 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states 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 21:40:49,677 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:49,677 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-19 21:40:49,677 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:52,044 INFO L129 PetriNetUnfolder]: 1761/5254 cut-off events. [2022-07-19 21:40:52,044 INFO L130 PetriNetUnfolder]: For 124047/124047 co-relation queries the response was YES. [2022-07-19 21:40:52,098 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44752 conditions, 5254 events. 1761/5254 cut-off events. For 124047/124047 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 49611 event pairs, 156 based on Foata normal form. 1/5163 useless extension candidates. Maximal degree in co-relation 44518. Up to 900 conditions per place. [2022-07-19 21:40:52,125 INFO L132 encePairwiseOnDemand]: 71/82 looper letters, 656 selfloop transitions, 868 changer transitions 12/1581 dead transitions. [2022-07-19 21:40:52,125 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1581 transitions, 35757 flow [2022-07-19 21:40:52,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:40:52,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:40:52,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1295 transitions. [2022-07-19 21:40:52,127 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7520325203252033 [2022-07-19 21:40:52,222 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1295 transitions. [2022-07-19 21:40:52,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1295 transitions. [2022-07-19 21:40:52,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:52,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1295 transitions. [2022-07-19 21:40:52,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 61.666666666666664) internal successors, (1295), 21 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states 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 21:40:52,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 82.0) internal successors, (1804), 22 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states 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 21:40:52,225 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 82.0) internal successors, (1804), 22 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states 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 21:40:52,225 INFO L186 Difference]: Start difference. First operand has 476 places, 1521 transitions, 31685 flow. Second operand 21 states and 1295 transitions. [2022-07-19 21:40:52,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1581 transitions, 35757 flow [2022-07-19 21:40:53,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 1581 transitions, 34429 flow, removed 121 selfloop flow, removed 26 redundant places. [2022-07-19 21:40:53,463 INFO L242 Difference]: Finished difference. Result has 471 places, 1527 transitions, 32263 flow [2022-07-19 21:40:53,464 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=30388, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=862, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=32263, PETRI_PLACES=471, PETRI_TRANSITIONS=1527} [2022-07-19 21:40:53,465 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 399 predicate places. [2022-07-19 21:40:53,465 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 1527 transitions, 32263 flow [2022-07-19 21:40:53,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states 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 21:40:53,466 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:53,466 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:53,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 21:40:53,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 21:40:53,671 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 21:40:53,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:53,671 INFO L85 PathProgramCache]: Analyzing trace with hash 258337235, now seen corresponding path program 11 times [2022-07-19 21:40:53,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:53,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767852986] [2022-07-19 21:40:53,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:53,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:53,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:53,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:53,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767852986] [2022-07-19 21:40:53,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767852986] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:53,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37044555] [2022-07-19 21:40:53,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:40:53,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:53,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:53,741 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:40:53,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 21:40:53,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-19 21:40:53,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:40:53,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:40:53,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:53,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:53,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:40:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:53,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37044555] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:40:53,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:40:53,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-07-19 21:40:53,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340296740] [2022-07-19 21:40:53,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:40:53,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 21:40:54,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:54,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 21:40:54,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-07-19 21:40:54,001 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-19 21:40:54,002 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 1527 transitions, 32263 flow. Second operand has 22 states, 22 states have (on average 59.13636363636363) internal successors, (1301), 22 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states 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 21:40:54,002 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:54,002 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-19 21:40:54,002 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:56,904 INFO L129 PetriNetUnfolder]: 2222/6104 cut-off events. [2022-07-19 21:40:56,905 INFO L130 PetriNetUnfolder]: For 160146/160146 co-relation queries the response was YES. [2022-07-19 21:40:56,977 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54762 conditions, 6104 events. 2222/6104 cut-off events. For 160146/160146 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 56585 event pairs, 71 based on Foata normal form. 1/6088 useless extension candidates. Maximal degree in co-relation 54432. Up to 2219 conditions per place. [2022-07-19 21:40:57,017 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1044 selfloop transitions, 906 changer transitions 14/2009 dead transitions. [2022-07-19 21:40:57,017 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 2009 transitions, 46439 flow [2022-07-19 21:40:57,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 21:40:57,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-19 21:40:57,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1469 transitions. [2022-07-19 21:40:57,018 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7464430894308943 [2022-07-19 21:40:57,019 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1469 transitions. [2022-07-19 21:40:57,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1469 transitions. [2022-07-19 21:40:57,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:57,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1469 transitions. [2022-07-19 21:40:57,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 61.208333333333336) internal successors, (1469), 24 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states 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 21:40:57,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 82.0) internal successors, (2050), 25 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states 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 21:40:57,022 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 82.0) internal successors, (2050), 25 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states 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 21:40:57,022 INFO L186 Difference]: Start difference. First operand has 471 places, 1527 transitions, 32263 flow. Second operand 24 states and 1469 transitions. [2022-07-19 21:40:57,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 2009 transitions, 46439 flow [2022-07-19 21:40:58,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 2009 transitions, 44451 flow, removed 2 selfloop flow, removed 16 redundant places. [2022-07-19 21:40:58,766 INFO L242 Difference]: Finished difference. Result has 486 places, 1815 transitions, 41302 flow [2022-07-19 21:40:58,768 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=30869, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=619, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=673, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=41302, PETRI_PLACES=486, PETRI_TRANSITIONS=1815} [2022-07-19 21:40:58,768 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 414 predicate places. [2022-07-19 21:40:58,768 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 1815 transitions, 41302 flow [2022-07-19 21:40:58,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.13636363636363) internal successors, (1301), 22 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states 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 21:40:58,769 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:58,769 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:58,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 21:40:58,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 21:40:58,983 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 21:40:58,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:58,984 INFO L85 PathProgramCache]: Analyzing trace with hash -876241051, now seen corresponding path program 12 times [2022-07-19 21:40:58,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:58,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884399650] [2022-07-19 21:40:58,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:58,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:59,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:59,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884399650] [2022-07-19 21:40:59,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884399650] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:59,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650178445] [2022-07-19 21:40:59,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:40:59,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:59,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:59,067 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:40:59,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 21:40:59,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-19 21:40:59,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:40:59,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:40:59,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:59,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:59,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:40:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:59,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650178445] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:40:59,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:40:59,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-07-19 21:40:59,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329895789] [2022-07-19 21:40:59,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:40:59,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 21:40:59,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:59,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 21:40:59,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-07-19 21:40:59,383 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-19 21:40:59,384 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 1815 transitions, 41302 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states 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 21:40:59,384 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:59,384 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-19 21:40:59,384 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:04,527 INFO L129 PetriNetUnfolder]: 3225/9342 cut-off events. [2022-07-19 21:41:04,527 INFO L130 PetriNetUnfolder]: For 269109/269109 co-relation queries the response was YES. [2022-07-19 21:41:04,617 INFO L84 FinitePrefix]: Finished finitePrefix Result has 86722 conditions, 9342 events. 3225/9342 cut-off events. For 269109/269109 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 95537 event pairs, 157 based on Foata normal form. 11/9304 useless extension candidates. Maximal degree in co-relation 86562. Up to 2674 conditions per place. [2022-07-19 21:41:04,668 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1602 selfloop transitions, 1237 changer transitions 24/2908 dead transitions. [2022-07-19 21:41:04,668 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 2908 transitions, 72684 flow [2022-07-19 21:41:04,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-19 21:41:04,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-19 21:41:04,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3734 transitions. [2022-07-19 21:41:04,671 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7465013994402239 [2022-07-19 21:41:04,671 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3734 transitions. [2022-07-19 21:41:04,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3734 transitions. [2022-07-19 21:41:04,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:04,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3734 transitions. [2022-07-19 21:41:04,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 61.21311475409836) internal successors, (3734), 61 states have internal predecessors, (3734), 0 states have call successors, (0), 0 states 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 21:41:04,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states 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 21:41:04,679 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states 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 21:41:04,679 INFO L186 Difference]: Start difference. First operand has 486 places, 1815 transitions, 41302 flow. Second operand 61 states and 3734 transitions. [2022-07-19 21:41:04,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 2908 transitions, 72684 flow [2022-07-19 21:41:07,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 2908 transitions, 72092 flow, removed 181 selfloop flow, removed 12 redundant places. [2022-07-19 21:41:07,695 INFO L242 Difference]: Finished difference. Result has 560 places, 2542 transitions, 63497 flow [2022-07-19 21:41:07,696 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=40961, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1815, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=611, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1000, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=63497, PETRI_PLACES=560, PETRI_TRANSITIONS=2542} [2022-07-19 21:41:07,697 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 488 predicate places. [2022-07-19 21:41:07,697 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 2542 transitions, 63497 flow [2022-07-19 21:41:07,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states 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 21:41:07,697 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:07,698 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:07,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 21:41:07,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 21:41:07,911 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 21:41:07,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:07,912 INFO L85 PathProgramCache]: Analyzing trace with hash 478208163, now seen corresponding path program 13 times [2022-07-19 21:41:07,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:07,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567670446] [2022-07-19 21:41:07,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:07,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:07,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:07,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:07,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567670446] [2022-07-19 21:41:07,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567670446] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:07,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513381539] [2022-07-19 21:41:07,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 21:41:07,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:07,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:07,982 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:41:07,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 21:41:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:08,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:41:08,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:08,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:08,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:08,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513381539] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:08,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:08,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-07-19 21:41:08,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675917222] [2022-07-19 21:41:08,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:08,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 21:41:08,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:08,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 21:41:08,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-07-19 21:41:08,231 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-19 21:41:08,232 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 2542 transitions, 63497 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states 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 21:41:08,232 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:08,232 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-19 21:41:08,232 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:16,958 INFO L129 PetriNetUnfolder]: 3972/11750 cut-off events. [2022-07-19 21:41:16,958 INFO L130 PetriNetUnfolder]: For 402447/402447 co-relation queries the response was YES. [2022-07-19 21:41:17,097 INFO L84 FinitePrefix]: Finished finitePrefix Result has 115276 conditions, 11750 events. 3972/11750 cut-off events. For 402447/402447 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 126472 event pairs, 238 based on Foata normal form. 79/11757 useless extension candidates. Maximal degree in co-relation 114268. Up to 2084 conditions per place. [2022-07-19 21:41:17,164 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 928 selfloop transitions, 2346 changer transitions 12/3331 dead transitions. [2022-07-19 21:41:17,165 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 3331 transitions, 88961 flow [2022-07-19 21:41:17,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-19 21:41:17,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-07-19 21:41:17,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3629 transitions. [2022-07-19 21:41:17,167 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.750103348491112 [2022-07-19 21:41:17,167 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3629 transitions. [2022-07-19 21:41:17,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3629 transitions. [2022-07-19 21:41:17,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:17,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3629 transitions. [2022-07-19 21:41:17,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 61.50847457627118) internal successors, (3629), 59 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states 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 21:41:17,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 82.0) internal successors, (4920), 60 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states 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 21:41:17,174 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 82.0) internal successors, (4920), 60 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states 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 21:41:17,174 INFO L186 Difference]: Start difference. First operand has 560 places, 2542 transitions, 63497 flow. Second operand 59 states and 3629 transitions. [2022-07-19 21:41:17,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 3331 transitions, 88961 flow [2022-07-19 21:41:22,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 3331 transitions, 88246 flow, removed 315 selfloop flow, removed 15 redundant places. [2022-07-19 21:41:22,216 INFO L242 Difference]: Finished difference. Result has 625 places, 3108 transitions, 86417 flow [2022-07-19 21:41:22,217 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=62640, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1822, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=86417, PETRI_PLACES=625, PETRI_TRANSITIONS=3108} [2022-07-19 21:41:22,217 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 553 predicate places. [2022-07-19 21:41:22,218 INFO L495 AbstractCegarLoop]: Abstraction has has 625 places, 3108 transitions, 86417 flow [2022-07-19 21:41:22,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states 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 21:41:22,218 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:22,218 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:22,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 21:41:22,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:22,423 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:41:22,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:22,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1907780337, now seen corresponding path program 14 times [2022-07-19 21:41:22,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:22,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817239243] [2022-07-19 21:41:22,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:22,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:22,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:22,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817239243] [2022-07-19 21:41:22,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817239243] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:22,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886019715] [2022-07-19 21:41:22,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:41:22,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:22,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:22,492 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:41:22,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 21:41:22,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:41:22,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:41:22,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:41:22,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:22,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:22,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:22,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:22,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886019715] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:22,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:22,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-07-19 21:41:22,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603396896] [2022-07-19 21:41:22,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:22,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 21:41:22,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:22,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 21:41:22,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-07-19 21:41:22,767 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-19 21:41:22,768 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 625 places, 3108 transitions, 86417 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states 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 21:41:22,768 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:22,768 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-19 21:41:22,768 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:32,730 INFO L129 PetriNetUnfolder]: 3986/11919 cut-off events. [2022-07-19 21:41:32,730 INFO L130 PetriNetUnfolder]: For 457064/457075 co-relation queries the response was YES. [2022-07-19 21:41:32,879 INFO L84 FinitePrefix]: Finished finitePrefix Result has 125431 conditions, 11919 events. 3986/11919 cut-off events. For 457064/457075 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 129436 event pairs, 227 based on Foata normal form. 14/11862 useless extension candidates. Maximal degree in co-relation 124803. Up to 2387 conditions per place. [2022-07-19 21:41:32,950 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1522 selfloop transitions, 1749 changer transitions 16/3332 dead transitions. [2022-07-19 21:41:32,950 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 667 places, 3332 transitions, 98550 flow [2022-07-19 21:41:32,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-19 21:41:32,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-07-19 21:41:32,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2662 transitions. [2022-07-19 21:41:32,952 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7549631310266591 [2022-07-19 21:41:32,952 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2662 transitions. [2022-07-19 21:41:32,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2662 transitions. [2022-07-19 21:41:32,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:32,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2662 transitions. [2022-07-19 21:41:32,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 61.906976744186046) internal successors, (2662), 43 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states 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 21:41:32,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 82.0) internal successors, (3608), 44 states have internal predecessors, (3608), 0 states have call successors, (0), 0 states 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 21:41:32,957 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 82.0) internal successors, (3608), 44 states have internal predecessors, (3608), 0 states have call successors, (0), 0 states 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 21:41:32,957 INFO L186 Difference]: Start difference. First operand has 625 places, 3108 transitions, 86417 flow. Second operand 43 states and 2662 transitions. [2022-07-19 21:41:32,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 667 places, 3332 transitions, 98550 flow [2022-07-19 21:41:39,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 643 places, 3332 transitions, 97346 flow, removed 233 selfloop flow, removed 24 redundant places. [2022-07-19 21:41:39,591 INFO L242 Difference]: Finished difference. Result has 651 places, 3141 transitions, 91046 flow [2022-07-19 21:41:39,593 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=85195, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1715, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=91046, PETRI_PLACES=651, PETRI_TRANSITIONS=3141} [2022-07-19 21:41:39,594 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 579 predicate places. [2022-07-19 21:41:39,594 INFO L495 AbstractCegarLoop]: Abstraction has has 651 places, 3141 transitions, 91046 flow [2022-07-19 21:41:39,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states 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 21:41:39,594 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:39,594 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:39,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 21:41:39,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 21:41:39,795 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:41:39,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:39,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1527497207, now seen corresponding path program 15 times [2022-07-19 21:41:39,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:39,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914728874] [2022-07-19 21:41:39,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:39,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:39,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:39,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914728874] [2022-07-19 21:41:39,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914728874] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:39,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60593488] [2022-07-19 21:41:39,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:41:39,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:39,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:39,883 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:41:39,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 21:41:39,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 21:41:39,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:41:39,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:41:39,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:40,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:40,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:40,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60593488] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:40,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:40,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-07-19 21:41:40,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109953928] [2022-07-19 21:41:40,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:40,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 21:41:40,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:40,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 21:41:40,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-07-19 21:41:40,157 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-19 21:41:40,158 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 651 places, 3141 transitions, 91046 flow. Second operand has 23 states, 23 states have (on average 59.69565217391305) internal successors, (1373), 23 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states 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 21:41:40,158 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:40,158 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-19 21:41:40,158 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:51,030 INFO L129 PetriNetUnfolder]: 4247/12550 cut-off events. [2022-07-19 21:41:51,030 INFO L130 PetriNetUnfolder]: For 529890/529890 co-relation queries the response was YES. [2022-07-19 21:41:51,207 INFO L84 FinitePrefix]: Finished finitePrefix Result has 137140 conditions, 12550 events. 4247/12550 cut-off events. For 529890/529890 co-relation queries the response was YES. Maximal size of possible extension queue 766. Compared 137100 event pairs, 93 based on Foata normal form. 120/12652 useless extension candidates. Maximal degree in co-relation 136696. Up to 4170 conditions per place. [2022-07-19 21:41:51,287 INFO L132 encePairwiseOnDemand]: 69/82 looper letters, 1360 selfloop transitions, 2155 changer transitions 16/3576 dead transitions. [2022-07-19 21:41:51,287 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 687 places, 3576 transitions, 109620 flow [2022-07-19 21:41:51,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-19 21:41:51,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-07-19 21:41:51,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2495 transitions. [2022-07-19 21:41:51,289 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.760670731707317 [2022-07-19 21:41:51,289 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2495 transitions. [2022-07-19 21:41:51,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2495 transitions. [2022-07-19 21:41:51,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:51,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2495 transitions. [2022-07-19 21:41:51,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 62.375) internal successors, (2495), 40 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states 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 21:41:51,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 82.0) internal successors, (3362), 41 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states 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 21:41:51,294 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 82.0) internal successors, (3362), 41 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states 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 21:41:51,294 INFO L186 Difference]: Start difference. First operand has 651 places, 3141 transitions, 91046 flow. Second operand 40 states and 2495 transitions. [2022-07-19 21:41:51,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 687 places, 3576 transitions, 109620 flow [2022-07-19 21:41:58,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 662 places, 3576 transitions, 107572 flow, removed 211 selfloop flow, removed 25 redundant places. [2022-07-19 21:41:58,580 INFO L242 Difference]: Finished difference. Result has 693 places, 3353 transitions, 104218 flow [2022-07-19 21:41:58,582 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=89188, PETRI_DIFFERENCE_MINUEND_PLACES=623, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1947, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=104218, PETRI_PLACES=693, PETRI_TRANSITIONS=3353} [2022-07-19 21:41:58,582 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 621 predicate places. [2022-07-19 21:41:58,582 INFO L495 AbstractCegarLoop]: Abstraction has has 693 places, 3353 transitions, 104218 flow [2022-07-19 21:41:58,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.69565217391305) internal successors, (1373), 23 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states 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 21:41:58,583 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:58,583 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:58,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-19 21:41:58,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 21:41:58,783 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:41:58,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:58,784 INFO L85 PathProgramCache]: Analyzing trace with hash -738199079, now seen corresponding path program 16 times [2022-07-19 21:41:58,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:58,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629077674] [2022-07-19 21:41:58,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:58,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:58,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:58,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629077674] [2022-07-19 21:41:58,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629077674] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:58,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9105031] [2022-07-19 21:41:58,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:41:58,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:58,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:58,861 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:41:58,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 21:41:58,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:41:58,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:41:58,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:41:58,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:59,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:59,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9105031] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:59,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:59,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-07-19 21:41:59,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013796744] [2022-07-19 21:41:59,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:59,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 21:41:59,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:59,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 21:41:59,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-07-19 21:41:59,116 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-19 21:41:59,116 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 693 places, 3353 transitions, 104218 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states 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 21:41:59,116 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:59,116 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-19 21:41:59,116 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:42:12,166 INFO L129 PetriNetUnfolder]: 4600/13629 cut-off events. [2022-07-19 21:42:12,166 INFO L130 PetriNetUnfolder]: For 752741/752741 co-relation queries the response was YES. [2022-07-19 21:42:12,383 INFO L84 FinitePrefix]: Finished finitePrefix Result has 162148 conditions, 13629 events. 4600/13629 cut-off events. For 752741/752741 co-relation queries the response was YES. Maximal size of possible extension queue 851. Compared 151723 event pairs, 317 based on Foata normal form. 4/13580 useless extension candidates. Maximal degree in co-relation 161702. Up to 5478 conditions per place. [2022-07-19 21:42:12,470 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 2681 selfloop transitions, 975 changer transitions 9/3710 dead transitions. [2022-07-19 21:42:12,470 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 729 places, 3710 transitions, 121868 flow [2022-07-19 21:42:12,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-19 21:42:12,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-19 21:42:12,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2265 transitions. [2022-07-19 21:42:12,472 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7465392221489783 [2022-07-19 21:42:12,472 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2265 transitions. [2022-07-19 21:42:12,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2265 transitions. [2022-07-19 21:42:12,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:42:12,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2265 transitions. [2022-07-19 21:42:12,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 61.21621621621622) internal successors, (2265), 37 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states 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 21:42:12,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 82.0) internal successors, (3116), 38 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states 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 21:42:12,477 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 82.0) internal successors, (3116), 38 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states 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 21:42:12,477 INFO L186 Difference]: Start difference. First operand has 693 places, 3353 transitions, 104218 flow. Second operand 37 states and 2265 transitions. [2022-07-19 21:42:12,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 729 places, 3710 transitions, 121868 flow [2022-07-19 21:42:22,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 725 places, 3710 transitions, 120746 flow, removed 418 selfloop flow, removed 4 redundant places. [2022-07-19 21:42:22,986 INFO L242 Difference]: Finished difference. Result has 738 places, 3499 transitions, 111316 flow [2022-07-19 21:42:22,989 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=103029, PETRI_DIFFERENCE_MINUEND_PLACES=689, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=826, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=111316, PETRI_PLACES=738, PETRI_TRANSITIONS=3499} [2022-07-19 21:42:22,989 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 666 predicate places. [2022-07-19 21:42:22,989 INFO L495 AbstractCegarLoop]: Abstraction has has 738 places, 3499 transitions, 111316 flow [2022-07-19 21:42:22,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states 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 21:42:22,990 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:42:22,990 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:42:23,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-19 21:42:23,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:42:23,203 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:42:23,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:42:23,204 INFO L85 PathProgramCache]: Analyzing trace with hash 822128127, now seen corresponding path program 17 times [2022-07-19 21:42:23,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:42:23,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891175830] [2022-07-19 21:42:23,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:42:23,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:42:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:42:23,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:42:23,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:42:23,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891175830] [2022-07-19 21:42:23,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891175830] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:42:23,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144523959] [2022-07-19 21:42:23,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:42:23,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:42:23,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:42:23,284 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:42:23,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 21:42:23,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-19 21:42:23,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:42:23,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:42:23,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:42:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:42:23,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:42:23,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:42:23,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144523959] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:42:23,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:42:23,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-07-19 21:42:23,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032304098] [2022-07-19 21:42:23,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:42:23,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 21:42:23,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:42:23,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 21:42:23,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-07-19 21:42:23,534 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-19 21:42:23,535 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 738 places, 3499 transitions, 111316 flow. Second operand has 22 states, 22 states have (on average 59.18181818181818) internal successors, (1302), 22 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states 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 21:42:23,535 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:42:23,535 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-19 21:42:23,535 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:42:43,846 INFO L129 PetriNetUnfolder]: 6530/19417 cut-off events. [2022-07-19 21:42:43,846 INFO L130 PetriNetUnfolder]: For 1144568/1144568 co-relation queries the response was YES. [2022-07-19 21:42:44,307 INFO L84 FinitePrefix]: Finished finitePrefix Result has 234708 conditions, 19417 events. 6530/19417 cut-off events. For 1144568/1144568 co-relation queries the response was YES. Maximal size of possible extension queue 1285. Compared 231725 event pairs, 235 based on Foata normal form. 7/19390 useless extension candidates. Maximal degree in co-relation 234098. Up to 3683 conditions per place. [2022-07-19 21:42:44,458 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1469 selfloop transitions, 3802 changer transitions 10/5326 dead transitions. [2022-07-19 21:42:44,458 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 788 places, 5326 transitions, 181444 flow [2022-07-19 21:42:44,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-19 21:42:44,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-07-19 21:42:44,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3351 transitions. [2022-07-19 21:42:44,460 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7430155210643016 [2022-07-19 21:42:44,460 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3351 transitions. [2022-07-19 21:42:44,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3351 transitions. [2022-07-19 21:42:44,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:42:44,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3351 transitions. [2022-07-19 21:42:44,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 60.92727272727273) internal successors, (3351), 55 states have internal predecessors, (3351), 0 states have call successors, (0), 0 states 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 21:42:44,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 82.0) internal successors, (4592), 56 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states 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 21:42:44,468 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 82.0) internal successors, (4592), 56 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states 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 21:42:44,468 INFO L186 Difference]: Start difference. First operand has 738 places, 3499 transitions, 111316 flow. Second operand 55 states and 3351 transitions. [2022-07-19 21:42:44,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 788 places, 5326 transitions, 181444 flow [2022-07-19 21:43:05,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 776 places, 5326 transitions, 180854 flow, removed 219 selfloop flow, removed 12 redundant places. [2022-07-19 21:43:06,026 INFO L242 Difference]: Finished difference. Result has 797 places, 4966 transitions, 177448 flow [2022-07-19 21:43:06,029 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=110844, PETRI_DIFFERENCE_MINUEND_PLACES=722, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2371, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=177448, PETRI_PLACES=797, PETRI_TRANSITIONS=4966} [2022-07-19 21:43:06,029 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 725 predicate places. [2022-07-19 21:43:06,029 INFO L495 AbstractCegarLoop]: Abstraction has has 797 places, 4966 transitions, 177448 flow [2022-07-19 21:43:06,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.18181818181818) internal successors, (1302), 22 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states 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 21:43:06,029 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:43:06,029 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:43:06,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-19 21:43:06,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:43:06,231 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:43:06,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:43:06,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1155759277, now seen corresponding path program 18 times [2022-07-19 21:43:06,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:43:06,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137971361] [2022-07-19 21:43:06,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:43:06,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:43:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:43:06,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:43:06,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:43:06,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137971361] [2022-07-19 21:43:06,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137971361] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:43:06,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960989669] [2022-07-19 21:43:06,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:43:06,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:43:06,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:43:06,312 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:43:06,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 21:43:06,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-19 21:43:06,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:43:06,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:43:06,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:43:06,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:43:06,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:43:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:43:06,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960989669] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:43:06,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:43:06,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-07-19 21:43:06,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391967691] [2022-07-19 21:43:06,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:43:06,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 21:43:06,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:43:06,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 21:43:06,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-07-19 21:43:06,587 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-19 21:43:06,587 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 797 places, 4966 transitions, 177448 flow. Second operand has 22 states, 22 states have (on average 59.63636363636363) internal successors, (1312), 22 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states 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 21:43:06,587 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:43:06,587 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-19 21:43:06,587 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:43:36,898 INFO L129 PetriNetUnfolder]: 6800/20186 cut-off events. [2022-07-19 21:43:36,898 INFO L130 PetriNetUnfolder]: For 1379071/1379071 co-relation queries the response was YES. [2022-07-19 21:43:37,559 INFO L84 FinitePrefix]: Finished finitePrefix Result has 262250 conditions, 20186 events. 6800/20186 cut-off events. For 1379071/1379071 co-relation queries the response was YES. Maximal size of possible extension queue 1320. Compared 242282 event pairs, 403 based on Foata normal form. 43/20164 useless extension candidates. Maximal degree in co-relation 261395. Up to 7887 conditions per place. [2022-07-19 21:43:37,733 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1932 selfloop transitions, 3330 changer transitions 7/5314 dead transitions. [2022-07-19 21:43:37,733 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 5314 transitions, 198766 flow [2022-07-19 21:43:37,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-19 21:43:37,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-19 21:43:37,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2100 transitions. [2022-07-19 21:43:37,735 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7532281205164992 [2022-07-19 21:43:37,735 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2100 transitions. [2022-07-19 21:43:37,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2100 transitions. [2022-07-19 21:43:37,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:43:37,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2100 transitions. [2022-07-19 21:43:37,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 61.76470588235294) internal successors, (2100), 34 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states 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 21:43:37,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 82.0) internal successors, (2870), 35 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states 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 21:43:37,739 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 82.0) internal successors, (2870), 35 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states 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 21:43:37,739 INFO L186 Difference]: Start difference. First operand has 797 places, 4966 transitions, 177448 flow. Second operand 34 states and 2100 transitions. [2022-07-19 21:43:37,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 825 places, 5314 transitions, 198766 flow [2022-07-19 21:44:05,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 804 places, 5314 transitions, 197346 flow, removed 480 selfloop flow, removed 21 redundant places. [2022-07-19 21:44:05,668 INFO L242 Difference]: Finished difference. Result has 819 places, 5171 transitions, 196248 flow [2022-07-19 21:44:05,671 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=176087, PETRI_DIFFERENCE_MINUEND_PLACES=771, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4966, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1764, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=196248, PETRI_PLACES=819, PETRI_TRANSITIONS=5171} [2022-07-19 21:44:05,672 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 747 predicate places. [2022-07-19 21:44:05,672 INFO L495 AbstractCegarLoop]: Abstraction has has 819 places, 5171 transitions, 196248 flow [2022-07-19 21:44:05,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.63636363636363) internal successors, (1312), 22 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states 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 21:44:05,672 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:05,672 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:44:05,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-19 21:44:05,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:05,873 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:05,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:05,873 INFO L85 PathProgramCache]: Analyzing trace with hash -270707467, now seen corresponding path program 19 times [2022-07-19 21:44:05,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:05,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536974828] [2022-07-19 21:44:05,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:05,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:05,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:05,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536974828] [2022-07-19 21:44:05,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536974828] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:44:05,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511030144] [2022-07-19 21:44:05,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 21:44:05,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:05,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:44:05,946 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:44:05,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-19 21:44:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:05,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:44:05,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:44:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:06,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:44:06,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:44:06,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511030144] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:44:06,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:44:06,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-07-19 21:44:06,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157259224] [2022-07-19 21:44:06,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:44:06,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 21:44:06,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:06,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 21:44:06,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-07-19 21:44:06,199 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-19 21:44:06,199 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 819 places, 5171 transitions, 196248 flow. Second operand has 22 states, 22 states have (on average 59.72727272727273) internal successors, (1314), 22 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states 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 21:44:06,199 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:06,199 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-19 21:44:06,199 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:41,606 INFO L129 PetriNetUnfolder]: 7238/21432 cut-off events. [2022-07-19 21:44:41,606 INFO L130 PetriNetUnfolder]: For 1604905/1604905 co-relation queries the response was YES. [2022-07-19 21:44:42,104 INFO L84 FinitePrefix]: Finished finitePrefix Result has 292492 conditions, 21432 events. 7238/21432 cut-off events. For 1604905/1604905 co-relation queries the response was YES. Maximal size of possible extension queue 1388. Compared 259478 event pairs, 361 based on Foata normal form. 43/21403 useless extension candidates. Maximal degree in co-relation 291656. Up to 7173 conditions per place. [2022-07-19 21:44:42,260 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 2026 selfloop transitions, 3585 changer transitions 10/5666 dead transitions. [2022-07-19 21:44:42,260 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 854 places, 5666 transitions, 224516 flow [2022-07-19 21:44:42,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-19 21:44:42,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-19 21:44:42,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2230 transitions. [2022-07-19 21:44:42,262 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.755420054200542 [2022-07-19 21:44:42,262 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2230 transitions. [2022-07-19 21:44:42,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2230 transitions. [2022-07-19 21:44:42,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:42,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2230 transitions. [2022-07-19 21:44:42,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 61.94444444444444) internal successors, (2230), 36 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states 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 21:44:42,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 82.0) internal successors, (3034), 37 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states 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 21:44:42,266 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 82.0) internal successors, (3034), 37 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states 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 21:44:42,266 INFO L186 Difference]: Start difference. First operand has 819 places, 5171 transitions, 196248 flow. Second operand 36 states and 2230 transitions. [2022-07-19 21:44:42,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 854 places, 5666 transitions, 224516 flow