./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i --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/goblint-regression/28-race_reach_28-funptr_racefree.i -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 5b90ecb07ae966182b79ce4444e238e18068c02297f514a326dfeeed6dbb5499 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:18:33,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:18:33,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:18:33,759 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:18:33,760 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:18:33,761 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:18:33,762 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:18:33,765 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:18:33,766 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:18:33,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:18:33,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:18:33,773 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:18:33,774 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:18:33,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:18:33,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:18:33,780 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:18:33,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:18:33,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:18:33,783 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:18:33,786 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:18:33,788 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:18:33,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:18:33,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:18:33,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:18:33,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:18:33,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:18:33,795 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:18:33,795 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:18:33,796 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:18:33,796 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:18:33,797 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:18:33,798 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:18:33,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:18:33,799 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:18:33,800 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:18:33,800 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:18:33,801 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:18:33,801 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:18:33,801 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:18:33,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:18:33,803 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:18:33,804 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:18:33,805 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:18:33,836 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:18:33,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:18:33,837 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:18:33,837 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:18:33,838 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:18:33,838 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:18:33,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:18:33,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:18:33,839 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:18:33,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:18:33,840 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:18:33,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:18:33,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:18:33,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:18:33,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:18:33,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:18:33,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:18:33,841 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:18:33,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:18:33,841 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:18:33,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:18:33,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:18:33,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:18:33,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:18:33,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:18:33,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:18:33,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:18:33,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:18:33,844 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:18:33,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:18:33,844 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:18:33,844 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:18:33,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:18:33,845 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b90ecb07ae966182b79ce4444e238e18068c02297f514a326dfeeed6dbb5499 [2022-07-19 21:18:34,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:18:34,077 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:18:34,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:18:34,079 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:18:34,080 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:18:34,080 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i [2022-07-19 21:18:34,137 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5595f0ad1/5e0e2c5b49104bdf8465f98572d5d5fe/FLAGd0a48f9b6 [2022-07-19 21:18:34,593 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:18:34,594 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i [2022-07-19 21:18:34,614 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5595f0ad1/5e0e2c5b49104bdf8465f98572d5d5fe/FLAGd0a48f9b6 [2022-07-19 21:18:34,941 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5595f0ad1/5e0e2c5b49104bdf8465f98572d5d5fe [2022-07-19 21:18:34,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:18:34,944 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:18:34,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:18:34,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:18:34,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:18:34,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:18:34" (1/1) ... [2022-07-19 21:18:34,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c3f90dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:34, skipping insertion in model container [2022-07-19 21:18:34,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:18:34" (1/1) ... [2022-07-19 21:18:34,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:18:34,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:18:35,379 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/goblint-regression/28-race_reach_28-funptr_racefree.i[41323,41336] [2022-07-19 21:18:35,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:18:35,416 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:18:35,457 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/goblint-regression/28-race_reach_28-funptr_racefree.i[41323,41336] [2022-07-19 21:18:35,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:18:35,526 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:18:35,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:35 WrapperNode [2022-07-19 21:18:35,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:18:35,528 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:18:35,529 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:18:35,529 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:18:35,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:35" (1/1) ... [2022-07-19 21:18:35,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:35" (1/1) ... [2022-07-19 21:18:35,600 INFO L137 Inliner]: procedures = 273, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 122 [2022-07-19 21:18:35,600 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:18:35,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:18:35,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:18:35,601 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:18:35,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:35" (1/1) ... [2022-07-19 21:18:35,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:35" (1/1) ... [2022-07-19 21:18:35,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:35" (1/1) ... [2022-07-19 21:18:35,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:35" (1/1) ... [2022-07-19 21:18:35,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:35" (1/1) ... [2022-07-19 21:18:35,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:35" (1/1) ... [2022-07-19 21:18:35,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:35" (1/1) ... [2022-07-19 21:18:35,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:18:35,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:18:35,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:18:35,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:18:35,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:35" (1/1) ... [2022-07-19 21:18:35,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:18:35,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:35,701 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 21:18:35,738 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 21:18:35,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:18:35,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:18:35,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:18:35,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:18:35,760 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-19 21:18:35,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:18:35,760 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-19 21:18:35,760 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-19 21:18:35,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:18:35,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:18:35,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:18:35,762 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 21:18:35,913 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:18:35,914 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:18:36,103 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:18:36,109 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:18:36,109 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-19 21:18:36,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:18:36 BoogieIcfgContainer [2022-07-19 21:18:36,112 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:18:36,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:18:36,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:18:36,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:18:36,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:18:34" (1/3) ... [2022-07-19 21:18:36,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d642f6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:18:36, skipping insertion in model container [2022-07-19 21:18:36,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:35" (2/3) ... [2022-07-19 21:18:36,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d642f6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:18:36, skipping insertion in model container [2022-07-19 21:18:36,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:18:36" (3/3) ... [2022-07-19 21:18:36,121 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_28-funptr_racefree.i [2022-07-19 21:18:36,126 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:18:36,132 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:18:36,133 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:18:36,133 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:18:36,194 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-19 21:18:36,221 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 119 places, 128 transitions, 264 flow [2022-07-19 21:18:36,279 INFO L129 PetriNetUnfolder]: 17/168 cut-off events. [2022-07-19 21:18:36,279 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-07-19 21:18:36,285 INFO L84 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 168 events. 17/168 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 398 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 84. Up to 4 conditions per place. [2022-07-19 21:18:36,286 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 128 transitions, 264 flow [2022-07-19 21:18:36,290 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 123 transitions, 251 flow [2022-07-19 21:18:36,298 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:36,303 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@5ab47269, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1808fc7f [2022-07-19 21:18:36,304 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:36,318 INFO L129 PetriNetUnfolder]: 4/95 cut-off events. [2022-07-19 21:18:36,318 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:36,318 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:36,319 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] [2022-07-19 21:18:36,319 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:36,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:36,323 INFO L85 PathProgramCache]: Analyzing trace with hash 773467911, now seen corresponding path program 1 times [2022-07-19 21:18:36,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:36,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741754736] [2022-07-19 21:18:36,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:36,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:36,525 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 21:18:36,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:36,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741754736] [2022-07-19 21:18:36,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741754736] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:36,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:36,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:36,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230135183] [2022-07-19 21:18:36,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:36,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:36,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:36,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:36,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:36,560 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 128 [2022-07-19 21:18:36,564 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 123 transitions, 251 flow. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states 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 21:18:36,564 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:36,564 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 128 [2022-07-19 21:18:36,565 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:36,647 INFO L129 PetriNetUnfolder]: 0/115 cut-off events. [2022-07-19 21:18:36,647 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:36,647 INFO L84 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 115 events. 0/115 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 95 event pairs, 0 based on Foata normal form. 16/128 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-19 21:18:36,649 INFO L132 encePairwiseOnDemand]: 114/128 looper letters, 8 selfloop transitions, 2 changer transitions 15/113 dead transitions. [2022-07-19 21:18:36,649 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 113 transitions, 251 flow [2022-07-19 21:18:36,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:36,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:36,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 350 transitions. [2022-07-19 21:18:36,659 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9114583333333334 [2022-07-19 21:18:36,660 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 350 transitions. [2022-07-19 21:18:36,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 350 transitions. [2022-07-19 21:18:36,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:36,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 350 transitions. [2022-07-19 21:18:36,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states 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 21:18:36,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states 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 21:18:36,672 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states 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 21:18:36,674 INFO L186 Difference]: Start difference. First operand has 115 places, 123 transitions, 251 flow. Second operand 3 states and 350 transitions. [2022-07-19 21:18:36,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 113 transitions, 251 flow [2022-07-19 21:18:36,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 113 transitions, 251 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:36,697 INFO L242 Difference]: Finished difference. Result has 117 places, 96 transitions, 205 flow [2022-07-19 21:18:36,699 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=117, PETRI_TRANSITIONS=96} [2022-07-19 21:18:36,702 INFO L279 CegarLoopForPetriNet]: 115 programPoint places, 2 predicate places. [2022-07-19 21:18:36,707 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 96 transitions, 205 flow [2022-07-19 21:18:36,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states 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 21:18:36,708 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:36,708 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:36,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:18:36,709 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:36,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:36,709 INFO L85 PathProgramCache]: Analyzing trace with hash 349975661, now seen corresponding path program 1 times [2022-07-19 21:18:36,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:36,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4632520] [2022-07-19 21:18:36,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:36,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:36,766 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:36,845 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:36,848 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:36,850 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:36,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:36,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:18:36,853 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-19 21:18:36,858 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:36,858 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-19 21:18:36,894 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:18:36,933 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 155 places, 169 transitions, 356 flow [2022-07-19 21:18:36,962 INFO L129 PetriNetUnfolder]: 31/274 cut-off events. [2022-07-19 21:18:36,962 INFO L130 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2022-07-19 21:18:36,965 INFO L84 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 274 events. 31/274 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 848 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 170. Up to 8 conditions per place. [2022-07-19 21:18:36,965 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 169 transitions, 356 flow [2022-07-19 21:18:36,973 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 169 transitions, 356 flow [2022-07-19 21:18:36,974 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:36,976 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@5ab47269, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1808fc7f [2022-07-19 21:18:36,979 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:36,990 INFO L129 PetriNetUnfolder]: 4/97 cut-off events. [2022-07-19 21:18:36,990 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:18:36,995 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:36,996 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] [2022-07-19 21:18:36,996 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:36,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:36,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1770099641, now seen corresponding path program 1 times [2022-07-19 21:18:36,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:36,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519166097] [2022-07-19 21:18:36,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:36,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:37,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:37,078 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 21:18:37,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:37,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519166097] [2022-07-19 21:18:37,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519166097] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:37,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:37,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:37,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083251839] [2022-07-19 21:18:37,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:37,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:37,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:37,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:37,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:37,080 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 169 [2022-07-19 21:18:37,081 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 169 transitions, 356 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states 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 21:18:37,081 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:37,081 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 169 [2022-07-19 21:18:37,081 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:37,146 INFO L129 PetriNetUnfolder]: 2/222 cut-off events. [2022-07-19 21:18:37,146 INFO L130 PetriNetUnfolder]: For 32/78 co-relation queries the response was YES. [2022-07-19 21:18:37,148 INFO L84 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 222 events. 2/222 cut-off events. For 32/78 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 496 event pairs, 0 based on Foata normal form. 50/264 useless extension candidates. Maximal degree in co-relation 136. Up to 16 conditions per place. [2022-07-19 21:18:37,149 INFO L132 encePairwiseOnDemand]: 149/169 looper letters, 11 selfloop transitions, 2 changer transitions 21/155 dead transitions. [2022-07-19 21:18:37,149 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 155 transitions, 358 flow [2022-07-19 21:18:37,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:37,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:37,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 460 transitions. [2022-07-19 21:18:37,155 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9072978303747534 [2022-07-19 21:18:37,155 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 460 transitions. [2022-07-19 21:18:37,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 460 transitions. [2022-07-19 21:18:37,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:37,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 460 transitions. [2022-07-19 21:18:37,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 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 21:18:37,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states 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 21:18:37,162 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states 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 21:18:37,162 INFO L186 Difference]: Start difference. First operand has 155 places, 169 transitions, 356 flow. Second operand 3 states and 460 transitions. [2022-07-19 21:18:37,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 155 transitions, 358 flow [2022-07-19 21:18:37,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 155 transitions, 358 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:37,167 INFO L242 Difference]: Finished difference. Result has 157 places, 131 transitions, 284 flow [2022-07-19 21:18:37,167 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=284, PETRI_PLACES=157, PETRI_TRANSITIONS=131} [2022-07-19 21:18:37,167 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 2 predicate places. [2022-07-19 21:18:37,168 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 131 transitions, 284 flow [2022-07-19 21:18:37,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states 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 21:18:37,168 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:37,168 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-07-19 21:18:37,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:18:37,169 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:37,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:37,169 INFO L85 PathProgramCache]: Analyzing trace with hash -720853353, now seen corresponding path program 1 times [2022-07-19 21:18:37,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:37,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378088385] [2022-07-19 21:18:37,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:37,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:37,213 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:37,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:37,245 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:37,246 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:37,246 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:37,247 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:37,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:18:37,247 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-19 21:18:37,248 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:37,248 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-19 21:18:37,277 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-19 21:18:37,282 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 191 places, 210 transitions, 450 flow [2022-07-19 21:18:37,335 INFO L129 PetriNetUnfolder]: 50/413 cut-off events. [2022-07-19 21:18:37,336 INFO L130 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2022-07-19 21:18:37,342 INFO L84 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 413 events. 50/413 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1481 event pairs, 1 based on Foata normal form. 0/355 useless extension candidates. Maximal degree in co-relation 282. Up to 16 conditions per place. [2022-07-19 21:18:37,342 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 210 transitions, 450 flow [2022-07-19 21:18:37,347 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 210 transitions, 450 flow [2022-07-19 21:18:37,348 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:37,349 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@5ab47269, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1808fc7f [2022-07-19 21:18:37,349 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:37,355 INFO L129 PetriNetUnfolder]: 4/94 cut-off events. [2022-07-19 21:18:37,355 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:18:37,355 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:37,355 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] [2022-07-19 21:18:37,355 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:37,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:37,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1931036359, now seen corresponding path program 1 times [2022-07-19 21:18:37,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:37,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142048724] [2022-07-19 21:18:37,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:37,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:37,391 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 21:18:37,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:37,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142048724] [2022-07-19 21:18:37,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142048724] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:37,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:37,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:37,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994073714] [2022-07-19 21:18:37,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:37,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:37,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:37,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:37,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:37,395 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 210 [2022-07-19 21:18:37,396 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 210 transitions, 450 flow. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states 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 21:18:37,396 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:37,396 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 210 [2022-07-19 21:18:37,396 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:37,465 INFO L129 PetriNetUnfolder]: 7/346 cut-off events. [2022-07-19 21:18:37,465 INFO L130 PetriNetUnfolder]: For 43/82 co-relation queries the response was YES. [2022-07-19 21:18:37,468 INFO L84 FinitePrefix]: Finished finitePrefix Result has 409 conditions, 346 events. 7/346 cut-off events. For 43/82 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1079 event pairs, 1 based on Foata normal form. 139/471 useless extension candidates. Maximal degree in co-relation 250. Up to 30 conditions per place. [2022-07-19 21:18:37,469 INFO L132 encePairwiseOnDemand]: 184/210 looper letters, 12 selfloop transitions, 2 changer transitions 22/190 dead transitions. [2022-07-19 21:18:37,472 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 190 transitions, 444 flow [2022-07-19 21:18:37,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:37,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:37,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 567 transitions. [2022-07-19 21:18:37,473 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-07-19 21:18:37,474 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 567 transitions. [2022-07-19 21:18:37,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 567 transitions. [2022-07-19 21:18:37,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:37,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 567 transitions. [2022-07-19 21:18:37,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states 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 21:18:37,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states 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 21:18:37,478 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states 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 21:18:37,478 INFO L186 Difference]: Start difference. First operand has 191 places, 210 transitions, 450 flow. Second operand 3 states and 567 transitions. [2022-07-19 21:18:37,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 190 transitions, 444 flow [2022-07-19 21:18:37,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 190 transitions, 444 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:37,486 INFO L242 Difference]: Finished difference. Result has 193 places, 165 transitions, 361 flow [2022-07-19 21:18:37,486 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=361, PETRI_PLACES=193, PETRI_TRANSITIONS=165} [2022-07-19 21:18:37,488 INFO L279 CegarLoopForPetriNet]: 191 programPoint places, 2 predicate places. [2022-07-19 21:18:37,488 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 165 transitions, 361 flow [2022-07-19 21:18:37,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states 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 21:18:37,489 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:37,489 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] [2022-07-19 21:18:37,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:18:37,489 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:37,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:37,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1053079369, now seen corresponding path program 1 times [2022-07-19 21:18:37,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:37,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048197210] [2022-07-19 21:18:37,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:37,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:37,562 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 21:18:37,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:37,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048197210] [2022-07-19 21:18:37,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048197210] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:37,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120123734] [2022-07-19 21:18:37,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:37,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:37,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:37,565 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 21:18:37,566 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 21:18:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:37,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:37,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:37,703 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 21:18:37,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:37,735 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 21:18:37,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120123734] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:37,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:37,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:37,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093378716] [2022-07-19 21:18:37,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:37,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:37,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:37,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:37,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:37,739 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 210 [2022-07-19 21:18:37,741 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 165 transitions, 361 flow. Second operand has 10 states, 10 states have (on average 174.3) internal successors, (1743), 10 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states 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 21:18:37,741 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:37,741 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 210 [2022-07-19 21:18:37,741 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:37,811 INFO L129 PetriNetUnfolder]: 0/186 cut-off events. [2022-07-19 21:18:37,812 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-19 21:18:37,812 INFO L84 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 186 events. 0/186 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 316 event pairs, 0 based on Foata normal form. 2/188 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-19 21:18:37,813 INFO L132 encePairwiseOnDemand]: 204/210 looper letters, 13 selfloop transitions, 9 changer transitions 0/175 dead transitions. [2022-07-19 21:18:37,813 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 175 transitions, 427 flow [2022-07-19 21:18:37,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:37,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:37,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1572 transitions. [2022-07-19 21:18:37,816 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8317460317460318 [2022-07-19 21:18:37,816 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1572 transitions. [2022-07-19 21:18:37,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1572 transitions. [2022-07-19 21:18:37,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:37,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1572 transitions. [2022-07-19 21:18:37,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 174.66666666666666) internal successors, (1572), 9 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states 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 21:18:37,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 210.0) internal successors, (2100), 10 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 21:18:37,823 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 210.0) internal successors, (2100), 10 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 21:18:37,823 INFO L186 Difference]: Start difference. First operand has 193 places, 165 transitions, 361 flow. Second operand 9 states and 1572 transitions. [2022-07-19 21:18:37,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 175 transitions, 427 flow [2022-07-19 21:18:37,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 175 transitions, 419 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:37,826 INFO L242 Difference]: Finished difference. Result has 184 places, 171 transitions, 403 flow [2022-07-19 21:18:37,827 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=403, PETRI_PLACES=184, PETRI_TRANSITIONS=171} [2022-07-19 21:18:37,827 INFO L279 CegarLoopForPetriNet]: 191 programPoint places, -7 predicate places. [2022-07-19 21:18:37,827 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 171 transitions, 403 flow [2022-07-19 21:18:37,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 174.3) internal successors, (1743), 10 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states 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 21:18:37,829 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:37,829 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:18:37,858 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 21:18:38,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-19 21:18:38,048 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:38,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:38,048 INFO L85 PathProgramCache]: Analyzing trace with hash -707148592, now seen corresponding path program 1 times [2022-07-19 21:18:38,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:38,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890631831] [2022-07-19 21:18:38,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:38,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:38,077 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:38,103 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:38,103 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:38,103 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:38,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:38,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:18:38,104 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-19 21:18:38,104 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:38,104 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-19 21:18:38,131 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-19 21:18:38,133 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 227 places, 251 transitions, 546 flow [2022-07-19 21:18:38,208 INFO L129 PetriNetUnfolder]: 81/620 cut-off events. [2022-07-19 21:18:38,209 INFO L130 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2022-07-19 21:18:38,216 INFO L84 FinitePrefix]: Finished finitePrefix Result has 675 conditions, 620 events. 81/620 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2544 event pairs, 6 based on Foata normal form. 0/534 useless extension candidates. Maximal degree in co-relation 433. Up to 32 conditions per place. [2022-07-19 21:18:38,216 INFO L82 GeneralOperation]: Start removeDead. Operand has 227 places, 251 transitions, 546 flow [2022-07-19 21:18:38,223 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 227 places, 251 transitions, 546 flow [2022-07-19 21:18:38,224 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:38,225 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@5ab47269, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1808fc7f [2022-07-19 21:18:38,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:38,230 INFO L129 PetriNetUnfolder]: 4/96 cut-off events. [2022-07-19 21:18:38,231 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:18:38,231 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:38,231 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] [2022-07-19 21:18:38,231 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:38,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:38,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1779389510, now seen corresponding path program 1 times [2022-07-19 21:18:38,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:38,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104099030] [2022-07-19 21:18:38,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:38,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:38,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:38,248 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 21:18:38,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:38,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104099030] [2022-07-19 21:18:38,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104099030] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:38,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:38,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:38,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678183839] [2022-07-19 21:18:38,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:38,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:38,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:38,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:38,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:38,251 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 251 [2022-07-19 21:18:38,251 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 251 transitions, 546 flow. Second operand has 2 states, 2 states have (on average 213.5) internal successors, (427), 2 states have internal predecessors, (427), 0 states have call successors, (0), 0 states 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 21:18:38,251 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:38,251 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 251 [2022-07-19 21:18:38,251 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:38,330 INFO L129 PetriNetUnfolder]: 21/555 cut-off events. [2022-07-19 21:18:38,330 INFO L130 PetriNetUnfolder]: For 126/150 co-relation queries the response was YES. [2022-07-19 21:18:38,335 INFO L84 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 555 events. 21/555 cut-off events. For 126/150 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2261 event pairs, 6 based on Foata normal form. 240/769 useless extension candidates. Maximal degree in co-relation 402. Up to 37 conditions per place. [2022-07-19 21:18:38,336 INFO L132 encePairwiseOnDemand]: 222/251 looper letters, 4 selfloop transitions, 0 changer transitions 23/221 dead transitions. [2022-07-19 21:18:38,336 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 221 transitions, 502 flow [2022-07-19 21:18:38,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:38,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:38,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 463 transitions. [2022-07-19 21:18:38,337 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9223107569721115 [2022-07-19 21:18:38,338 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 463 transitions. [2022-07-19 21:18:38,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 463 transitions. [2022-07-19 21:18:38,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:38,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 463 transitions. [2022-07-19 21:18:38,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 231.5) internal successors, (463), 2 states have internal predecessors, (463), 0 states have call successors, (0), 0 states 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 21:18:38,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states 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 21:18:38,340 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states 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 21:18:38,340 INFO L186 Difference]: Start difference. First operand has 227 places, 251 transitions, 546 flow. Second operand 2 states and 463 transitions. [2022-07-19 21:18:38,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 221 transitions, 502 flow [2022-07-19 21:18:38,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 221 transitions, 502 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:38,345 INFO L242 Difference]: Finished difference. Result has 227 places, 198 transitions, 428 flow [2022-07-19 21:18:38,345 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=428, PETRI_PLACES=227, PETRI_TRANSITIONS=198} [2022-07-19 21:18:38,347 INFO L279 CegarLoopForPetriNet]: 227 programPoint places, 0 predicate places. [2022-07-19 21:18:38,347 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 198 transitions, 428 flow [2022-07-19 21:18:38,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 213.5) internal successors, (427), 2 states have internal predecessors, (427), 0 states have call successors, (0), 0 states 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 21:18:38,347 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:38,347 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] [2022-07-19 21:18:38,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:18:38,348 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:38,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:38,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1008025977, now seen corresponding path program 1 times [2022-07-19 21:18:38,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:38,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980274993] [2022-07-19 21:18:38,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:38,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:38,377 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 21:18:38,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:38,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980274993] [2022-07-19 21:18:38,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980274993] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:38,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:38,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:38,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983930935] [2022-07-19 21:18:38,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:38,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:38,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:38,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:38,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:38,381 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 251 [2022-07-19 21:18:38,381 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 198 transitions, 428 flow. Second operand has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states 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 21:18:38,381 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:38,381 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 251 [2022-07-19 21:18:38,381 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:38,432 INFO L129 PetriNetUnfolder]: 0/274 cut-off events. [2022-07-19 21:18:38,432 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-19 21:18:38,432 INFO L84 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 274 events. 0/274 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 764 event pairs, 0 based on Foata normal form. 0/270 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-07-19 21:18:38,433 INFO L132 encePairwiseOnDemand]: 248/251 looper letters, 13 selfloop transitions, 2 changer transitions 0/202 dead transitions. [2022-07-19 21:18:38,433 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 202 transitions, 466 flow [2022-07-19 21:18:38,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:38,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:38,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 634 transitions. [2022-07-19 21:18:38,435 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8419654714475432 [2022-07-19 21:18:38,435 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 634 transitions. [2022-07-19 21:18:38,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 634 transitions. [2022-07-19 21:18:38,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:38,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 634 transitions. [2022-07-19 21:18:38,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.33333333333334) internal successors, (634), 3 states have internal predecessors, (634), 0 states have call successors, (0), 0 states 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 21:18:38,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states 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 21:18:38,438 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states 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 21:18:38,438 INFO L186 Difference]: Start difference. First operand has 227 places, 198 transitions, 428 flow. Second operand 3 states and 634 transitions. [2022-07-19 21:18:38,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 202 transitions, 466 flow [2022-07-19 21:18:38,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 202 transitions, 454 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:38,443 INFO L242 Difference]: Finished difference. Result has 211 places, 199 transitions, 428 flow [2022-07-19 21:18:38,443 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=428, PETRI_PLACES=211, PETRI_TRANSITIONS=199} [2022-07-19 21:18:38,445 INFO L279 CegarLoopForPetriNet]: 227 programPoint places, -16 predicate places. [2022-07-19 21:18:38,445 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 199 transitions, 428 flow [2022-07-19 21:18:38,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states 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 21:18:38,445 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:38,445 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] [2022-07-19 21:18:38,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 21:18:38,446 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:38,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:38,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1183444336, now seen corresponding path program 1 times [2022-07-19 21:18:38,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:38,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626021460] [2022-07-19 21:18:38,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:38,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:38,503 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 21:18:38,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:38,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626021460] [2022-07-19 21:18:38,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626021460] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:38,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222628753] [2022-07-19 21:18:38,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:38,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:38,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:38,505 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 21:18:38,524 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 21:18:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:38,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:38,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:38,654 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 21:18:38,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:38,686 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 21:18:38,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222628753] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:38,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:38,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:38,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372029544] [2022-07-19 21:18:38,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:38,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:38,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:38,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:38,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:38,691 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 251 [2022-07-19 21:18:38,693 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 199 transitions, 428 flow. Second operand has 10 states, 10 states have (on average 207.3) internal successors, (2073), 10 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states 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 21:18:38,693 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:38,693 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 251 [2022-07-19 21:18:38,693 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:38,783 INFO L129 PetriNetUnfolder]: 0/244 cut-off events. [2022-07-19 21:18:38,783 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-19 21:18:38,783 INFO L84 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 244 events. 0/244 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 572 event pairs, 0 based on Foata normal form. 2/246 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-19 21:18:38,784 INFO L132 encePairwiseOnDemand]: 245/251 looper letters, 14 selfloop transitions, 9 changer transitions 0/209 dead transitions. [2022-07-19 21:18:38,784 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 209 transitions, 496 flow [2022-07-19 21:18:38,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:38,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:38,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1870 transitions. [2022-07-19 21:18:38,788 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8277999114652501 [2022-07-19 21:18:38,788 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1870 transitions. [2022-07-19 21:18:38,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1870 transitions. [2022-07-19 21:18:38,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:38,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1870 transitions. [2022-07-19 21:18:38,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 207.77777777777777) internal successors, (1870), 9 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states 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 21:18:38,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 251.0) internal successors, (2510), 10 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states 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 21:18:38,796 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 251.0) internal successors, (2510), 10 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states 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 21:18:38,796 INFO L186 Difference]: Start difference. First operand has 211 places, 199 transitions, 428 flow. Second operand 9 states and 1870 transitions. [2022-07-19 21:18:38,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 209 transitions, 496 flow [2022-07-19 21:18:38,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 209 transitions, 494 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:38,800 INFO L242 Difference]: Finished difference. Result has 221 places, 205 transitions, 476 flow [2022-07-19 21:18:38,800 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=476, PETRI_PLACES=221, PETRI_TRANSITIONS=205} [2022-07-19 21:18:38,801 INFO L279 CegarLoopForPetriNet]: 227 programPoint places, -6 predicate places. [2022-07-19 21:18:38,802 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 205 transitions, 476 flow [2022-07-19 21:18:38,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 207.3) internal successors, (2073), 10 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states 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 21:18:38,803 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:38,804 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:18:38,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:39,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 21:18:39,012 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:39,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:39,012 INFO L85 PathProgramCache]: Analyzing trace with hash 134031480, now seen corresponding path program 1 times [2022-07-19 21:18:39,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:39,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077059714] [2022-07-19 21:18:39,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:39,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:39,035 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:39,086 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:39,086 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:39,087 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:39,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:39,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 21:18:39,087 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-19 21:18:39,088 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:39,088 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-19 21:18:39,110 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-19 21:18:39,112 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 263 places, 292 transitions, 644 flow [2022-07-19 21:18:39,268 INFO L129 PetriNetUnfolder]: 140/967 cut-off events. [2022-07-19 21:18:39,268 INFO L130 PetriNetUnfolder]: For 110/115 co-relation queries the response was YES. [2022-07-19 21:18:39,289 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1078 conditions, 967 events. 140/967 cut-off events. For 110/115 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4579 event pairs, 23 based on Foata normal form. 0/837 useless extension candidates. Maximal degree in co-relation 665. Up to 80 conditions per place. [2022-07-19 21:18:39,289 INFO L82 GeneralOperation]: Start removeDead. Operand has 263 places, 292 transitions, 644 flow [2022-07-19 21:18:39,299 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 263 places, 292 transitions, 644 flow [2022-07-19 21:18:39,300 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:39,300 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@5ab47269, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1808fc7f [2022-07-19 21:18:39,300 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:39,305 INFO L129 PetriNetUnfolder]: 4/97 cut-off events. [2022-07-19 21:18:39,305 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:18:39,305 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:39,306 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] [2022-07-19 21:18:39,306 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:39,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:39,306 INFO L85 PathProgramCache]: Analyzing trace with hash 790063430, now seen corresponding path program 1 times [2022-07-19 21:18:39,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:39,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742048240] [2022-07-19 21:18:39,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:39,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:39,326 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 21:18:39,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:39,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742048240] [2022-07-19 21:18:39,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742048240] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:39,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:39,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:39,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966400202] [2022-07-19 21:18:39,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:39,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:39,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:39,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:39,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:39,329 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 292 [2022-07-19 21:18:39,330 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 292 transitions, 644 flow. Second operand has 2 states, 2 states have (on average 246.5) internal successors, (493), 2 states have internal predecessors, (493), 0 states have call successors, (0), 0 states 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 21:18:39,330 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:39,330 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 292 [2022-07-19 21:18:39,330 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:39,479 INFO L129 PetriNetUnfolder]: 54/875 cut-off events. [2022-07-19 21:18:39,479 INFO L130 PetriNetUnfolder]: For 287/308 co-relation queries the response was YES. [2022-07-19 21:18:39,490 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1072 conditions, 875 events. 54/875 cut-off events. For 287/308 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4171 event pairs, 23 based on Foata normal form. 563/1394 useless extension candidates. Maximal degree in co-relation 636. Up to 86 conditions per place. [2022-07-19 21:18:39,492 INFO L132 encePairwiseOnDemand]: 257/292 looper letters, 5 selfloop transitions, 0 changer transitions 24/256 dead transitions. [2022-07-19 21:18:39,493 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 256 transitions, 592 flow [2022-07-19 21:18:39,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:39,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:39,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 537 transitions. [2022-07-19 21:18:39,494 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9195205479452054 [2022-07-19 21:18:39,494 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 537 transitions. [2022-07-19 21:18:39,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 537 transitions. [2022-07-19 21:18:39,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:39,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 537 transitions. [2022-07-19 21:18:39,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 268.5) internal successors, (537), 2 states have internal predecessors, (537), 0 states have call successors, (0), 0 states 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 21:18:39,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states 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 21:18:39,497 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states 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 21:18:39,497 INFO L186 Difference]: Start difference. First operand has 263 places, 292 transitions, 644 flow. Second operand 2 states and 537 transitions. [2022-07-19 21:18:39,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 256 transitions, 592 flow [2022-07-19 21:18:39,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 256 transitions, 592 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:39,502 INFO L242 Difference]: Finished difference. Result has 263 places, 232 transitions, 509 flow [2022-07-19 21:18:39,502 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=509, PETRI_PLACES=263, PETRI_TRANSITIONS=232} [2022-07-19 21:18:39,504 INFO L279 CegarLoopForPetriNet]: 263 programPoint places, 0 predicate places. [2022-07-19 21:18:39,504 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 232 transitions, 509 flow [2022-07-19 21:18:39,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 246.5) internal successors, (493), 2 states have internal predecessors, (493), 0 states have call successors, (0), 0 states 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 21:18:39,504 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:39,505 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] [2022-07-19 21:18:39,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 21:18:39,505 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:39,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:39,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1997352057, now seen corresponding path program 1 times [2022-07-19 21:18:39,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:39,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130392043] [2022-07-19 21:18:39,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:39,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:39,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:39,529 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 21:18:39,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:39,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130392043] [2022-07-19 21:18:39,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130392043] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:39,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:39,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:39,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880347143] [2022-07-19 21:18:39,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:39,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:39,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:39,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:39,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:39,533 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 292 [2022-07-19 21:18:39,534 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 232 transitions, 509 flow. Second operand has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states 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 21:18:39,534 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:39,534 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 292 [2022-07-19 21:18:39,534 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:39,607 INFO L129 PetriNetUnfolder]: 0/332 cut-off events. [2022-07-19 21:18:39,607 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-19 21:18:39,608 INFO L84 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 332 events. 0/332 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1017 event pairs, 0 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-07-19 21:18:39,609 INFO L132 encePairwiseOnDemand]: 289/292 looper letters, 14 selfloop transitions, 2 changer transitions 0/236 dead transitions. [2022-07-19 21:18:39,609 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 236 transitions, 549 flow [2022-07-19 21:18:39,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:39,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:39,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 734 transitions. [2022-07-19 21:18:39,611 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8378995433789954 [2022-07-19 21:18:39,611 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 734 transitions. [2022-07-19 21:18:39,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 734 transitions. [2022-07-19 21:18:39,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:39,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 734 transitions. [2022-07-19 21:18:39,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states 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 21:18:39,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states 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 21:18:39,614 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states 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 21:18:39,614 INFO L186 Difference]: Start difference. First operand has 263 places, 232 transitions, 509 flow. Second operand 3 states and 734 transitions. [2022-07-19 21:18:39,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 236 transitions, 549 flow [2022-07-19 21:18:39,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 236 transitions, 529 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:39,618 INFO L242 Difference]: Finished difference. Result has 247 places, 233 transitions, 501 flow [2022-07-19 21:18:39,619 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=501, PETRI_PLACES=247, PETRI_TRANSITIONS=233} [2022-07-19 21:18:39,620 INFO L279 CegarLoopForPetriNet]: 263 programPoint places, -16 predicate places. [2022-07-19 21:18:39,620 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 233 transitions, 501 flow [2022-07-19 21:18:39,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states 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 21:18:39,620 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:39,621 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] [2022-07-19 21:18:39,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 21:18:39,621 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:39,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:39,623 INFO L85 PathProgramCache]: Analyzing trace with hash 446612663, now seen corresponding path program 1 times [2022-07-19 21:18:39,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:39,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579743739] [2022-07-19 21:18:39,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:39,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:39,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:39,657 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 21:18:39,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:39,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579743739] [2022-07-19 21:18:39,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579743739] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:39,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962095030] [2022-07-19 21:18:39,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:39,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:39,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:39,664 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 21:18:39,665 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 21:18:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:39,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:39,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:39,782 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 21:18:39,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:39,807 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 21:18:39,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962095030] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:39,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:39,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:39,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5251808] [2022-07-19 21:18:39,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:39,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:39,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:39,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:39,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:39,813 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 292 [2022-07-19 21:18:39,815 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 233 transitions, 501 flow. Second operand has 10 states, 10 states have (on average 240.3) internal successors, (2403), 10 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states 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 21:18:39,815 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:39,815 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 292 [2022-07-19 21:18:39,815 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:39,898 INFO L129 PetriNetUnfolder]: 0/302 cut-off events. [2022-07-19 21:18:39,898 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:18:39,899 INFO L84 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 302 events. 0/302 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 829 event pairs, 0 based on Foata normal form. 2/304 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-19 21:18:39,899 INFO L132 encePairwiseOnDemand]: 286/292 looper letters, 15 selfloop transitions, 9 changer transitions 0/243 dead transitions. [2022-07-19 21:18:39,899 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 243 transitions, 571 flow [2022-07-19 21:18:39,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:39,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:39,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2168 transitions. [2022-07-19 21:18:39,903 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8249619482496194 [2022-07-19 21:18:39,903 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2168 transitions. [2022-07-19 21:18:39,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2168 transitions. [2022-07-19 21:18:39,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:39,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2168 transitions. [2022-07-19 21:18:39,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 240.88888888888889) internal successors, (2168), 9 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states 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 21:18:39,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 292.0) internal successors, (2920), 10 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states 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 21:18:39,911 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 292.0) internal successors, (2920), 10 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states 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 21:18:39,911 INFO L186 Difference]: Start difference. First operand has 247 places, 233 transitions, 501 flow. Second operand 9 states and 2168 transitions. [2022-07-19 21:18:39,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 243 transitions, 571 flow [2022-07-19 21:18:39,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 243 transitions, 569 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:39,915 INFO L242 Difference]: Finished difference. Result has 257 places, 239 transitions, 549 flow [2022-07-19 21:18:39,915 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=549, PETRI_PLACES=257, PETRI_TRANSITIONS=239} [2022-07-19 21:18:39,916 INFO L279 CegarLoopForPetriNet]: 263 programPoint places, -6 predicate places. [2022-07-19 21:18:39,916 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 239 transitions, 549 flow [2022-07-19 21:18:39,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 240.3) internal successors, (2403), 10 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states 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 21:18:39,917 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:39,917 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:18:39,943 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 21:18:40,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:40,132 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:40,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:40,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1580915110, now seen corresponding path program 1 times [2022-07-19 21:18:40,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:40,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274100723] [2022-07-19 21:18:40,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:40,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-19 21:18:40,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:40,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274100723] [2022-07-19 21:18:40,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274100723] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:40,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:40,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:18:40,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597184853] [2022-07-19 21:18:40,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:40,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:18:40,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:40,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:18:40,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:18:40,193 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 292 [2022-07-19 21:18:40,194 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 239 transitions, 549 flow. Second operand has 5 states, 5 states have (on average 221.6) internal successors, (1108), 5 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states 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 21:18:40,194 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:40,195 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 292 [2022-07-19 21:18:40,195 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:17,775 INFO L129 PetriNetUnfolder]: 110509/274479 cut-off events. [2022-07-19 21:19:17,775 INFO L130 PetriNetUnfolder]: For 2454/2454 co-relation queries the response was YES. [2022-07-19 21:19:20,780 INFO L84 FinitePrefix]: Finished finitePrefix Result has 418466 conditions, 274479 events. 110509/274479 cut-off events. For 2454/2454 co-relation queries the response was YES. Maximal size of possible extension queue 9001. Compared 4091916 event pairs, 63940 based on Foata normal form. 3875/273785 useless extension candidates. Maximal degree in co-relation 418454. Up to 88950 conditions per place. [2022-07-19 21:19:21,956 INFO L132 encePairwiseOnDemand]: 283/292 looper letters, 38 selfloop transitions, 6 changer transitions 65/318 dead transitions. [2022-07-19 21:19:21,956 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 318 transitions, 945 flow [2022-07-19 21:19:21,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:19:21,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:19:21,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1651 transitions. [2022-07-19 21:19:21,959 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8077299412915852 [2022-07-19 21:19:21,960 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1651 transitions. [2022-07-19 21:19:21,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1651 transitions. [2022-07-19 21:19:21,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:21,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1651 transitions. [2022-07-19 21:19:21,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 235.85714285714286) internal successors, (1651), 7 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states 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 21:19:21,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 292.0) internal successors, (2336), 8 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states 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 21:19:21,967 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 292.0) internal successors, (2336), 8 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states 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 21:19:21,967 INFO L186 Difference]: Start difference. First operand has 257 places, 239 transitions, 549 flow. Second operand 7 states and 1651 transitions. [2022-07-19 21:19:21,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 318 transitions, 945 flow [2022-07-19 21:19:21,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 318 transitions, 939 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:21,973 INFO L242 Difference]: Finished difference. Result has 267 places, 244 transitions, 611 flow [2022-07-19 21:19:21,974 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=611, PETRI_PLACES=267, PETRI_TRANSITIONS=244} [2022-07-19 21:19:21,974 INFO L279 CegarLoopForPetriNet]: 263 programPoint places, 4 predicate places. [2022-07-19 21:19:21,974 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 244 transitions, 611 flow [2022-07-19 21:19:21,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 221.6) internal successors, (1108), 5 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states 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 21:19:21,975 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:21,975 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:19:21,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 21:19:21,975 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:21,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:21,976 INFO L85 PathProgramCache]: Analyzing trace with hash -366048529, now seen corresponding path program 1 times [2022-07-19 21:19:21,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:21,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114149395] [2022-07-19 21:19:21,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:21,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:21,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:21,991 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:19:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:22,006 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:19:22,013 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:19:22,014 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:19:22,014 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:19:22,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 21:19:22,014 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 21:19:22,015 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:19:22,016 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-19 21:19:22,035 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-19 21:19:22,038 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 299 places, 333 transitions, 744 flow [2022-07-19 21:19:22,262 INFO L129 PetriNetUnfolder]: 263/1602 cut-off events. [2022-07-19 21:19:22,262 INFO L130 PetriNetUnfolder]: For 242/248 co-relation queries the response was YES. [2022-07-19 21:19:22,292 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1834 conditions, 1602 events. 263/1602 cut-off events. For 242/248 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 9197 event pairs, 72 based on Foata normal form. 0/1396 useless extension candidates. Maximal degree in co-relation 1066. Up to 192 conditions per place. [2022-07-19 21:19:22,292 INFO L82 GeneralOperation]: Start removeDead. Operand has 299 places, 333 transitions, 744 flow [2022-07-19 21:19:22,304 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 299 places, 333 transitions, 744 flow [2022-07-19 21:19:22,305 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:19:22,305 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@5ab47269, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1808fc7f [2022-07-19 21:19:22,306 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:19:22,309 INFO L129 PetriNetUnfolder]: 4/96 cut-off events. [2022-07-19 21:19:22,309 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:19:22,309 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:22,309 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:22,309 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:22,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:22,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1036941881, now seen corresponding path program 1 times [2022-07-19 21:19:22,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:22,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244552007] [2022-07-19 21:19:22,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:22,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:22,324 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 21:19:22,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:22,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244552007] [2022-07-19 21:19:22,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244552007] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:22,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:22,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:19:22,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902608318] [2022-07-19 21:19:22,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:22,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:19:22,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:22,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:19:22,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:19:22,327 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 333 [2022-07-19 21:19:22,328 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 333 transitions, 744 flow. Second operand has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states 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 21:19:22,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:22,328 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 333 [2022-07-19 21:19:22,328 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:22,553 INFO L129 PetriNetUnfolder]: 134/1446 cut-off events. [2022-07-19 21:19:22,553 INFO L130 PetriNetUnfolder]: For 662/845 co-relation queries the response was YES. [2022-07-19 21:19:22,571 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1911 conditions, 1446 events. 134/1446 cut-off events. For 662/845 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8621 event pairs, 72 based on Foata normal form. 1602/2972 useless extension candidates. Maximal degree in co-relation 1069. Up to 228 conditions per place. [2022-07-19 21:19:22,573 INFO L132 encePairwiseOnDemand]: 289/333 looper letters, 15 selfloop transitions, 2 changer transitions 25/295 dead transitions. [2022-07-19 21:19:22,573 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 295 transitions, 714 flow [2022-07-19 21:19:22,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:19:22,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:19:22,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 888 transitions. [2022-07-19 21:19:22,578 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8888888888888888 [2022-07-19 21:19:22,578 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 888 transitions. [2022-07-19 21:19:22,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 888 transitions. [2022-07-19 21:19:22,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:22,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 888 transitions. [2022-07-19 21:19:22,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 0 states have call successors, (0), 0 states 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 21:19:22,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 21:19:22,582 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 21:19:22,583 INFO L186 Difference]: Start difference. First operand has 299 places, 333 transitions, 744 flow. Second operand 3 states and 888 transitions. [2022-07-19 21:19:22,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 295 transitions, 714 flow [2022-07-19 21:19:22,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 295 transitions, 714 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:22,587 INFO L242 Difference]: Finished difference. Result has 301 places, 267 transitions, 604 flow [2022-07-19 21:19:22,587 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=604, PETRI_PLACES=301, PETRI_TRANSITIONS=267} [2022-07-19 21:19:22,588 INFO L279 CegarLoopForPetriNet]: 299 programPoint places, 2 predicate places. [2022-07-19 21:19:22,588 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 267 transitions, 604 flow [2022-07-19 21:19:22,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states 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 21:19:22,589 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:22,589 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] [2022-07-19 21:19:22,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 21:19:22,589 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:22,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:22,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1648283070, now seen corresponding path program 1 times [2022-07-19 21:19:22,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:22,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042203163] [2022-07-19 21:19:22,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:22,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:22,613 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 21:19:22,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:22,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042203163] [2022-07-19 21:19:22,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042203163] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:22,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582604792] [2022-07-19 21:19:22,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:22,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:22,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:22,615 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 21:19:22,616 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 21:19:22,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:22,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:19:22,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:22,735 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 21:19:22,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:22,760 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 21:19:22,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582604792] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:22,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:22,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:19:22,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643703641] [2022-07-19 21:19:22,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:22,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:19:22,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:22,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:19:22,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:19:22,764 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 333 [2022-07-19 21:19:22,765 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 267 transitions, 604 flow. Second operand has 10 states, 10 states have (on average 273.3) internal successors, (2733), 10 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states 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 21:19:22,765 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:22,766 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 333 [2022-07-19 21:19:22,766 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:22,855 INFO L129 PetriNetUnfolder]: 0/360 cut-off events. [2022-07-19 21:19:22,855 INFO L130 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2022-07-19 21:19:22,855 INFO L84 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 360 events. 0/360 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1088 event pairs, 0 based on Foata normal form. 2/362 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-19 21:19:22,856 INFO L132 encePairwiseOnDemand]: 327/333 looper letters, 16 selfloop transitions, 9 changer transitions 0/277 dead transitions. [2022-07-19 21:19:22,856 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 277 transitions, 676 flow [2022-07-19 21:19:22,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:19:22,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:19:22,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2466 transitions. [2022-07-19 21:19:22,860 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8228228228228228 [2022-07-19 21:19:22,860 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2466 transitions. [2022-07-19 21:19:22,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2466 transitions. [2022-07-19 21:19:22,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:22,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2466 transitions. [2022-07-19 21:19:22,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 274.0) internal successors, (2466), 9 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states 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 21:19:22,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states 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 21:19:22,868 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states 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 21:19:22,868 INFO L186 Difference]: Start difference. First operand has 301 places, 267 transitions, 604 flow. Second operand 9 states and 2466 transitions. [2022-07-19 21:19:22,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 277 transitions, 676 flow [2022-07-19 21:19:22,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 277 transitions, 644 flow, removed 15 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:22,872 INFO L242 Difference]: Finished difference. Result has 292 places, 273 transitions, 622 flow [2022-07-19 21:19:22,872 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=622, PETRI_PLACES=292, PETRI_TRANSITIONS=273} [2022-07-19 21:19:22,873 INFO L279 CegarLoopForPetriNet]: 299 programPoint places, -7 predicate places. [2022-07-19 21:19:22,873 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 273 transitions, 622 flow [2022-07-19 21:19:22,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 273.3) internal successors, (2733), 10 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states 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 21:19:22,874 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:22,874 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:19:22,891 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 21:19:23,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 21:19:23,087 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:23,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:23,088 INFO L85 PathProgramCache]: Analyzing trace with hash 94054063, now seen corresponding path program 1 times [2022-07-19 21:19:23,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:23,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70469336] [2022-07-19 21:19:23,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:23,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-19 21:19:23,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:23,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70469336] [2022-07-19 21:19:23,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70469336] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:23,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:23,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:19:23,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497387283] [2022-07-19 21:19:23,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:23,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:19:23,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:23,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:19:23,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:19:23,165 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 333 [2022-07-19 21:19:23,166 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 273 transitions, 622 flow. Second operand has 5 states, 5 states have (on average 250.6) internal successors, (1253), 5 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states 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 21:19:23,166 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:23,166 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 333 [2022-07-19 21:19:23,166 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand