./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.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 dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:58:15,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:58:15,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:58:15,070 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:58:15,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:58:15,071 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:58:15,072 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:58:15,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:58:15,074 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:58:15,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:58:15,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:58:15,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:58:15,077 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:58:15,077 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:58:15,078 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:58:15,079 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:58:15,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:58:15,080 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:58:15,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:58:15,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:58:15,083 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:58:15,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:58:15,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:58:15,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:58:15,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:58:15,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:58:15,087 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:58:15,088 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:58:15,088 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:58:15,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:58:15,089 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:58:15,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:58:15,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:58:15,090 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:58:15,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:58:15,092 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:58:15,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:58:15,092 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:58:15,092 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:58:15,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:58:15,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:58:15,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:58:15,095 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:58:15,108 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:58:15,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:58:15,109 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:58:15,109 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:58:15,110 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:58:15,110 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:58:15,110 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:58:15,111 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:58:15,111 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:58:15,111 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:58:15,111 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:58:15,111 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:58:15,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:58:15,112 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:58:15,112 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:58:15,112 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:58:15,112 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:58:15,112 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:58:15,113 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:58:15,113 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:58:15,113 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:58:15,113 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:58:15,113 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:58:15,114 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:58:15,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:58:15,114 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:58:15,114 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:58:15,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:58:15,115 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:58:15,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:58:15,115 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:58:15,115 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:58:15,115 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:58:15,115 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe [2022-07-13 21:58:15,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:58:15,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:58:15,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:58:15,313 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:58:15,314 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:58:15,314 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2022-07-13 21:58:15,376 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0523df562/f8bca81d3b374e67959403d3c95b0e98/FLAGc03862d4e [2022-07-13 21:58:15,769 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:58:15,770 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2022-07-13 21:58:15,781 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0523df562/f8bca81d3b374e67959403d3c95b0e98/FLAGc03862d4e [2022-07-13 21:58:15,790 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0523df562/f8bca81d3b374e67959403d3c95b0e98 [2022-07-13 21:58:15,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:58:15,792 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:58:15,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:58:15,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:58:15,796 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:58:15,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:58:15" (1/1) ... [2022-07-13 21:58:15,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b5d0790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:58:15, skipping insertion in model container [2022-07-13 21:58:15,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:58:15" (1/1) ... [2022-07-13 21:58:15,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:58:15,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:58:16,464 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_77-tricky_address4_racing.i[41323,41336] [2022-07-13 21:58:16,498 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:58:16,529 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:58:16,574 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_77-tricky_address4_racing.i[41323,41336] [2022-07-13 21:58:16,611 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:58:16,677 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:58:16,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:58:16 WrapperNode [2022-07-13 21:58:16,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:58:16,678 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:58:16,678 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:58:16,679 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:58:16,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:58:16" (1/1) ... [2022-07-13 21:58:16,719 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:58:16" (1/1) ... [2022-07-13 21:58:16,763 INFO L137 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 189 [2022-07-13 21:58:16,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:58:16,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:58:16,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:58:16,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:58:16,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:58:16" (1/1) ... [2022-07-13 21:58:16,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:58:16" (1/1) ... [2022-07-13 21:58:16,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:58:16" (1/1) ... [2022-07-13 21:58:16,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:58:16" (1/1) ... [2022-07-13 21:58:16,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:58:16" (1/1) ... [2022-07-13 21:58:16,837 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:58:16" (1/1) ... [2022-07-13 21:58:16,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:58:16" (1/1) ... [2022-07-13 21:58:16,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:58:16,841 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:58:16,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:58:16,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:58:16,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:58:16" (1/1) ... [2022-07-13 21:58:16,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:58:16,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:16,893 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 21:58:16,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 21:58:16,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:58:16,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:58:16,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 21:58:16,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:58:16,948 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-13 21:58:16,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:58:16,948 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-13 21:58:16,948 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-13 21:58:16,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:58:16,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:58:16,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:58:16,950 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 21:58:17,144 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:58:17,150 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:58:17,412 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:58:17,418 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:58:17,419 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2022-07-13 21:58:17,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:58:17 BoogieIcfgContainer [2022-07-13 21:58:17,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:58:17,422 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:58:17,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:58:17,428 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:58:17,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:58:15" (1/3) ... [2022-07-13 21:58:17,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5371eeb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:58:17, skipping insertion in model container [2022-07-13 21:58:17,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:58:16" (2/3) ... [2022-07-13 21:58:17,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5371eeb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:58:17, skipping insertion in model container [2022-07-13 21:58:17,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:58:17" (3/3) ... [2022-07-13 21:58:17,431 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_77-tricky_address4_racing.i [2022-07-13 21:58:17,435 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:58:17,441 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:58:17,442 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-13 21:58:17,442 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:58:17,491 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-13 21:58:17,534 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 172 places, 200 transitions, 408 flow [2022-07-13 21:58:17,622 INFO L129 PetriNetUnfolder]: 45/272 cut-off events. [2022-07-13 21:58:17,622 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-07-13 21:58:17,626 INFO L84 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 272 events. 45/272 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 842 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 150. Up to 8 conditions per place. [2022-07-13 21:58:17,626 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 200 transitions, 408 flow [2022-07-13 21:58:17,630 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 195 transitions, 395 flow [2022-07-13 21:58:17,637 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:58:17,644 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@22200cbc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5f05024d [2022-07-13 21:58:17,644 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-13 21:58:17,674 INFO L129 PetriNetUnfolder]: 14/131 cut-off events. [2022-07-13 21:58:17,674 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:58:17,675 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:17,676 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] [2022-07-13 21:58:17,676 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-13 21:58:17,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:17,680 INFO L85 PathProgramCache]: Analyzing trace with hash -959674574, now seen corresponding path program 1 times [2022-07-13 21:58:17,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:17,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590218213] [2022-07-13 21:58:17,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:17,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:17,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:58:17,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:17,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590218213] [2022-07-13 21:58:17,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590218213] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:17,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:58:17,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:58:17,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521804598] [2022-07-13 21:58:17,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:17,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:58:17,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:17,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:58:17,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:58:17,922 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 200 [2022-07-13 21:58:17,924 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 195 transitions, 395 flow. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:17,924 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:17,924 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 200 [2022-07-13 21:58:17,925 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:17,988 INFO L129 PetriNetUnfolder]: 4/228 cut-off events. [2022-07-13 21:58:17,989 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:58:17,990 INFO L84 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 228 events. 4/228 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 629 event pairs, 0 based on Foata normal form. 39/254 useless extension candidates. Maximal degree in co-relation 125. Up to 9 conditions per place. [2022-07-13 21:58:17,991 INFO L132 encePairwiseOnDemand]: 170/200 looper letters, 10 selfloop transitions, 2 changer transitions 1/170 dead transitions. [2022-07-13 21:58:17,991 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 170 transitions, 369 flow [2022-07-13 21:58:17,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:58:17,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:58:18,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2022-07-13 21:58:18,002 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8783333333333333 [2022-07-13 21:58:18,002 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2022-07-13 21:58:18,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2022-07-13 21:58:18,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:18,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2022-07-13 21:58:18,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:18,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:18,013 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:18,014 INFO L186 Difference]: Start difference. First operand has 168 places, 195 transitions, 395 flow. Second operand 3 states and 527 transitions. [2022-07-13 21:58:18,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 170 transitions, 369 flow [2022-07-13 21:58:18,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 170 transitions, 369 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:58:18,019 INFO L242 Difference]: Finished difference. Result has 169 places, 166 transitions, 347 flow [2022-07-13 21:58:18,021 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=347, PETRI_PLACES=169, PETRI_TRANSITIONS=166} [2022-07-13 21:58:18,023 INFO L279 CegarLoopForPetriNet]: 168 programPoint places, 1 predicate places. [2022-07-13 21:58:18,024 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 166 transitions, 347 flow [2022-07-13 21:58:18,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:18,024 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:18,024 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, 1, 1, 1] [2022-07-13 21:58:18,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:58:18,025 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-13 21:58:18,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:18,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1718762197, now seen corresponding path program 1 times [2022-07-13 21:58:18,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:18,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611445419] [2022-07-13 21:58:18,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:18,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:58:18,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:18,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611445419] [2022-07-13 21:58:18,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611445419] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:18,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396828939] [2022-07-13 21:58:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:18,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:18,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:18,124 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:58:18,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 21:58:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:18,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:58:18,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:18,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:58:18,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:18,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:58:18,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396828939] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:18,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:18,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:58:18,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44940188] [2022-07-13 21:58:18,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:18,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:58:18,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:18,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:58:18,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:58:18,276 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 200 [2022-07-13 21:58:18,277 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 166 transitions, 347 flow. Second operand has 10 states, 10 states have (on average 163.1) internal successors, (1631), 10 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:18,277 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:18,277 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 200 [2022-07-13 21:58:18,278 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:18,344 INFO L129 PetriNetUnfolder]: 4/234 cut-off events. [2022-07-13 21:58:18,344 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 21:58:18,345 INFO L84 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 234 events. 4/234 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 622 event pairs, 0 based on Foata normal form. 2/225 useless extension candidates. Maximal degree in co-relation 227. Up to 6 conditions per place. [2022-07-13 21:58:18,345 INFO L132 encePairwiseOnDemand]: 194/200 looper letters, 11 selfloop transitions, 9 changer transitions 0/176 dead transitions. [2022-07-13 21:58:18,345 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 176 transitions, 409 flow [2022-07-13 21:58:18,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:58:18,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:58:18,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1471 transitions. [2022-07-13 21:58:18,348 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8172222222222222 [2022-07-13 21:58:18,349 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1471 transitions. [2022-07-13 21:58:18,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1471 transitions. [2022-07-13 21:58:18,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:18,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1471 transitions. [2022-07-13 21:58:18,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 163.44444444444446) internal successors, (1471), 9 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:18,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 200.0) internal successors, (2000), 10 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:18,356 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 200.0) internal successors, (2000), 10 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:18,356 INFO L186 Difference]: Start difference. First operand has 169 places, 166 transitions, 347 flow. Second operand 9 states and 1471 transitions. [2022-07-13 21:58:18,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 176 transitions, 409 flow [2022-07-13 21:58:18,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 176 transitions, 407 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:18,359 INFO L242 Difference]: Finished difference. Result has 178 places, 172 transitions, 395 flow [2022-07-13 21:58:18,360 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=395, PETRI_PLACES=178, PETRI_TRANSITIONS=172} [2022-07-13 21:58:18,360 INFO L279 CegarLoopForPetriNet]: 168 programPoint places, 10 predicate places. [2022-07-13 21:58:18,360 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 172 transitions, 395 flow [2022-07-13 21:58:18,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.1) internal successors, (1631), 10 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:18,361 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:18,362 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 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] [2022-07-13 21:58:18,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:18,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:18,584 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-13 21:58:18,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:18,585 INFO L85 PathProgramCache]: Analyzing trace with hash 2122069387, now seen corresponding path program 2 times [2022-07-13 21:58:18,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:18,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509015175] [2022-07-13 21:58:18,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:18,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:58:18,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:18,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509015175] [2022-07-13 21:58:18,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509015175] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:18,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004057927] [2022-07-13 21:58:18,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 21:58:18,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:18,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:18,687 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:58:18,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 21:58:18,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 21:58:18,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:58:18,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:58:18,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:58:18,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:18,888 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:58:18,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004057927] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:18,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:18,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:58:18,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724930452] [2022-07-13 21:58:18,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:18,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:58:18,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:18,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:58:18,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:58:18,894 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 200 [2022-07-13 21:58:18,897 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 172 transitions, 395 flow. Second operand has 18 states, 18 states have (on average 163.27777777777777) internal successors, (2939), 18 states have internal predecessors, (2939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:18,910 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:18,910 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 200 [2022-07-13 21:58:18,910 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:19,089 INFO L129 PetriNetUnfolder]: 4/254 cut-off events. [2022-07-13 21:58:19,090 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-07-13 21:58:19,091 INFO L84 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 254 events. 4/254 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 622 event pairs, 0 based on Foata normal form. 4/247 useless extension candidates. Maximal degree in co-relation 221. Up to 11 conditions per place. [2022-07-13 21:58:19,091 INFO L132 encePairwiseOnDemand]: 194/200 looper letters, 19 selfloop transitions, 21 changer transitions 0/196 dead transitions. [2022-07-13 21:58:19,092 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 196 transitions, 583 flow [2022-07-13 21:58:19,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:58:19,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:58:19,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3425 transitions. [2022-07-13 21:58:19,097 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8154761904761905 [2022-07-13 21:58:19,097 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3425 transitions. [2022-07-13 21:58:19,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3425 transitions. [2022-07-13 21:58:19,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:19,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3425 transitions. [2022-07-13 21:58:19,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 163.0952380952381) internal successors, (3425), 21 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:19,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 200.0) internal successors, (4400), 22 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:19,109 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 200.0) internal successors, (4400), 22 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:19,109 INFO L186 Difference]: Start difference. First operand has 178 places, 172 transitions, 395 flow. Second operand 21 states and 3425 transitions. [2022-07-13 21:58:19,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 196 transitions, 583 flow [2022-07-13 21:58:19,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 196 transitions, 569 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:19,114 INFO L242 Difference]: Finished difference. Result has 202 places, 185 transitions, 519 flow [2022-07-13 21:58:19,114 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=519, PETRI_PLACES=202, PETRI_TRANSITIONS=185} [2022-07-13 21:58:19,115 INFO L279 CegarLoopForPetriNet]: 168 programPoint places, 34 predicate places. [2022-07-13 21:58:19,115 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 185 transitions, 519 flow [2022-07-13 21:58:19,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 163.27777777777777) internal successors, (2939), 18 states have internal predecessors, (2939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:19,116 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:19,117 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 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] [2022-07-13 21:58:19,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:19,351 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,SelfDestructingSolverStorable2 [2022-07-13 21:58:19,352 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-13 21:58:19,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:19,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1016344139, now seen corresponding path program 3 times [2022-07-13 21:58:19,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:19,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016326986] [2022-07-13 21:58:19,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:19,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:58:19,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:19,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016326986] [2022-07-13 21:58:19,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016326986] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:19,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041431614] [2022-07-13 21:58:19,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 21:58:19,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:19,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:19,564 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:58:19,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 21:58:19,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-13 21:58:19,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:58:19,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:58:19,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:58:19,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:58:19,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041431614] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:19,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:19,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-07-13 21:58:19,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106831189] [2022-07-13 21:58:19,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:19,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 21:58:19,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:19,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 21:58:19,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-13 21:58:19,891 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 200 [2022-07-13 21:58:19,895 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 185 transitions, 519 flow. Second operand has 23 states, 23 states have (on average 163.43478260869566) internal successors, (3759), 23 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:19,895 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:19,895 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 200 [2022-07-13 21:58:19,895 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:20,289 INFO L129 PetriNetUnfolder]: 4/269 cut-off events. [2022-07-13 21:58:20,290 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-13 21:58:20,291 INFO L84 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 269 events. 4/269 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 622 event pairs, 0 based on Foata normal form. 3/261 useless extension candidates. Maximal degree in co-relation 317. Up to 17 conditions per place. [2022-07-13 21:58:20,291 INFO L132 encePairwiseOnDemand]: 194/200 looper letters, 25 selfloop transitions, 30 changer transitions 0/211 dead transitions. [2022-07-13 21:58:20,292 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 211 transitions, 775 flow [2022-07-13 21:58:20,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 21:58:20,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-13 21:58:20,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4888 transitions. [2022-07-13 21:58:20,301 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8146666666666667 [2022-07-13 21:58:20,301 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4888 transitions. [2022-07-13 21:58:20,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4888 transitions. [2022-07-13 21:58:20,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:20,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4888 transitions. [2022-07-13 21:58:20,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 162.93333333333334) internal successors, (4888), 30 states have internal predecessors, (4888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:20,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 200.0) internal successors, (6200), 31 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:20,321 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 200.0) internal successors, (6200), 31 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:20,321 INFO L186 Difference]: Start difference. First operand has 202 places, 185 transitions, 519 flow. Second operand 30 states and 4888 transitions. [2022-07-13 21:58:20,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 211 transitions, 775 flow [2022-07-13 21:58:20,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 211 transitions, 745 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-07-13 21:58:20,326 INFO L242 Difference]: Finished difference. Result has 229 places, 195 transitions, 647 flow [2022-07-13 21:58:20,327 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=647, PETRI_PLACES=229, PETRI_TRANSITIONS=195} [2022-07-13 21:58:20,327 INFO L279 CegarLoopForPetriNet]: 168 programPoint places, 61 predicate places. [2022-07-13 21:58:20,328 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 195 transitions, 647 flow [2022-07-13 21:58:20,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 163.43478260869566) internal successors, (3759), 23 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:20,329 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:20,329 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 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] [2022-07-13 21:58:20,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:20,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:20,547 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-13 21:58:20,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:20,548 INFO L85 PathProgramCache]: Analyzing trace with hash 282089810, now seen corresponding path program 4 times [2022-07-13 21:58:20,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:20,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235305328] [2022-07-13 21:58:20,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:20,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:58:20,572 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:58:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:58:20,610 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:58:20,611 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:58:20,611 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-13 21:58:20,613 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-13 21:58:20,613 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-13 21:58:20,613 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-13 21:58:20,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:58:20,614 INFO L356 BasicCegarLoop]: Path program histogram: [4, 1] [2022-07-13 21:58:20,615 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:58:20,615 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-13 21:58:20,634 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 21:58:20,636 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 235 places, 275 transitions, 568 flow [2022-07-13 21:58:20,665 INFO L129 PetriNetUnfolder]: 75/444 cut-off events. [2022-07-13 21:58:20,666 INFO L130 PetriNetUnfolder]: For 6/9 co-relation queries the response was YES. [2022-07-13 21:58:20,669 INFO L84 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 444 events. 75/444 cut-off events. For 6/9 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1728 event pairs, 0 based on Foata normal form. 0/360 useless extension candidates. Maximal degree in co-relation 274. Up to 12 conditions per place. [2022-07-13 21:58:20,669 INFO L82 GeneralOperation]: Start removeDead. Operand has 235 places, 275 transitions, 568 flow [2022-07-13 21:58:20,673 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 235 places, 275 transitions, 568 flow [2022-07-13 21:58:20,674 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:58:20,674 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@22200cbc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5f05024d [2022-07-13 21:58:20,675 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-13 21:58:20,679 INFO L129 PetriNetUnfolder]: 15/134 cut-off events. [2022-07-13 21:58:20,680 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:58:20,680 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:20,680 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] [2022-07-13 21:58:20,680 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:58:20,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:20,680 INFO L85 PathProgramCache]: Analyzing trace with hash -451559023, now seen corresponding path program 1 times [2022-07-13 21:58:20,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:20,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457829705] [2022-07-13 21:58:20,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:20,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:20,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:20,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457829705] [2022-07-13 21:58:20,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457829705] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:20,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:58:20,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:58:20,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899445499] [2022-07-13 21:58:20,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:20,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:58:20,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:20,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:58:20,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:58:20,695 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 275 [2022-07-13 21:58:20,696 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 275 transitions, 568 flow. Second operand has 2 states, 2 states have (on average 230.0) internal successors, (460), 2 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) [2022-07-13 21:58:20,696 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:20,696 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 275 [2022-07-13 21:58:20,696 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:20,749 INFO L129 PetriNetUnfolder]: 9/373 cut-off events. [2022-07-13 21:58:20,749 INFO L130 PetriNetUnfolder]: For 19/23 co-relation queries the response was YES. [2022-07-13 21:58:20,752 INFO L84 FinitePrefix]: Finished finitePrefix Result has 394 conditions, 373 events. 9/373 cut-off events. For 19/23 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1442 event pairs, 0 based on Foata normal form. 91/443 useless extension candidates. Maximal degree in co-relation 233. Up to 7 conditions per place. [2022-07-13 21:58:20,753 INFO L132 encePairwiseOnDemand]: 236/275 looper letters, 4 selfloop transitions, 0 changer transitions 1/233 dead transitions. [2022-07-13 21:58:20,753 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 233 transitions, 492 flow [2022-07-13 21:58:20,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:58:20,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:58:20,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 501 transitions. [2022-07-13 21:58:20,754 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9109090909090909 [2022-07-13 21:58:20,754 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 501 transitions. [2022-07-13 21:58:20,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 501 transitions. [2022-07-13 21:58:20,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:20,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 501 transitions. [2022-07-13 21:58:20,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 250.5) internal successors, (501), 2 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:20,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 275.0) internal successors, (825), 3 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:20,757 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 275.0) internal successors, (825), 3 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:20,757 INFO L186 Difference]: Start difference. First operand has 235 places, 275 transitions, 568 flow. Second operand 2 states and 501 transitions. [2022-07-13 21:58:20,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 233 transitions, 492 flow [2022-07-13 21:58:20,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 233 transitions, 492 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:58:20,760 INFO L242 Difference]: Finished difference. Result has 233 places, 232 transitions, 482 flow [2022-07-13 21:58:20,760 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=482, PETRI_PLACES=233, PETRI_TRANSITIONS=232} [2022-07-13 21:58:20,761 INFO L279 CegarLoopForPetriNet]: 235 programPoint places, -2 predicate places. [2022-07-13 21:58:20,761 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 232 transitions, 482 flow [2022-07-13 21:58:20,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 230.0) internal successors, (460), 2 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) [2022-07-13 21:58:20,761 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:20,761 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] [2022-07-13 21:58:20,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:58:20,762 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:58:20,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:20,762 INFO L85 PathProgramCache]: Analyzing trace with hash 2017606803, now seen corresponding path program 1 times [2022-07-13 21:58:20,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:20,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778441473] [2022-07-13 21:58:20,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:20,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:20,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:20,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:20,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:20,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778441473] [2022-07-13 21:58:20,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778441473] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:20,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:58:20,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:58:20,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418109703] [2022-07-13 21:58:20,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:20,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:58:20,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:20,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:58:20,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:58:20,779 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 275 [2022-07-13 21:58:20,780 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 232 transitions, 482 flow. Second operand has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:20,780 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:20,780 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 275 [2022-07-13 21:58:20,780 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:20,819 INFO L129 PetriNetUnfolder]: 9/376 cut-off events. [2022-07-13 21:58:20,819 INFO L130 PetriNetUnfolder]: For 19/23 co-relation queries the response was YES. [2022-07-13 21:58:20,822 INFO L84 FinitePrefix]: Finished finitePrefix Result has 409 conditions, 376 events. 9/376 cut-off events. For 19/23 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1438 event pairs, 0 based on Foata normal form. 0/356 useless extension candidates. Maximal degree in co-relation 404. Up to 14 conditions per place. [2022-07-13 21:58:20,823 INFO L132 encePairwiseOnDemand]: 272/275 looper letters, 13 selfloop transitions, 2 changer transitions 0/236 dead transitions. [2022-07-13 21:58:20,823 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 236 transitions, 520 flow [2022-07-13 21:58:20,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:58:20,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:58:20,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2022-07-13 21:58:20,825 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8266666666666667 [2022-07-13 21:58:20,825 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2022-07-13 21:58:20,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2022-07-13 21:58:20,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:20,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2022-07-13 21:58:20,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:20,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:20,827 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:20,828 INFO L186 Difference]: Start difference. First operand has 233 places, 232 transitions, 482 flow. Second operand 3 states and 682 transitions. [2022-07-13 21:58:20,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 236 transitions, 520 flow [2022-07-13 21:58:20,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 236 transitions, 520 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:58:20,831 INFO L242 Difference]: Finished difference. Result has 235 places, 233 transitions, 494 flow [2022-07-13 21:58:20,831 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=232, 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=494, PETRI_PLACES=235, PETRI_TRANSITIONS=233} [2022-07-13 21:58:20,832 INFO L279 CegarLoopForPetriNet]: 235 programPoint places, 0 predicate places. [2022-07-13 21:58:20,832 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 233 transitions, 494 flow [2022-07-13 21:58:20,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:20,832 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:20,832 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] [2022-07-13 21:58:20,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 21:58:20,833 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:58:20,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:20,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1078955039, now seen corresponding path program 1 times [2022-07-13 21:58:20,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:20,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572418296] [2022-07-13 21:58:20,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:20,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:20,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:20,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:20,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572418296] [2022-07-13 21:58:20,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572418296] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:20,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186151635] [2022-07-13 21:58:20,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:20,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:20,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:20,884 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:58:20,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 21:58:20,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:20,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 21:58:20,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:20,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:58:20,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:58:20,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186151635] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:20,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:58:20,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-13 21:58:20,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044852975] [2022-07-13 21:58:20,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:20,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:58:20,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:20,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:58:20,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:58:20,988 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 275 [2022-07-13 21:58:20,988 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 233 transitions, 494 flow. Second operand has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:20,988 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:20,988 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 275 [2022-07-13 21:58:20,989 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:21,061 INFO L129 PetriNetUnfolder]: 7/331 cut-off events. [2022-07-13 21:58:21,061 INFO L130 PetriNetUnfolder]: For 21/45 co-relation queries the response was YES. [2022-07-13 21:58:21,064 INFO L84 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 331 events. 7/331 cut-off events. For 21/45 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1126 event pairs, 0 based on Foata normal form. 1/316 useless extension candidates. Maximal degree in co-relation 367. Up to 16 conditions per place. [2022-07-13 21:58:21,065 INFO L132 encePairwiseOnDemand]: 272/275 looper letters, 13 selfloop transitions, 2 changer transitions 0/237 dead transitions. [2022-07-13 21:58:21,065 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 237 transitions, 532 flow [2022-07-13 21:58:21,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:58:21,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:58:21,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2022-07-13 21:58:21,067 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8266666666666667 [2022-07-13 21:58:21,067 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2022-07-13 21:58:21,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2022-07-13 21:58:21,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:21,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2022-07-13 21:58:21,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:21,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:21,070 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:21,070 INFO L186 Difference]: Start difference. First operand has 235 places, 233 transitions, 494 flow. Second operand 3 states and 682 transitions. [2022-07-13 21:58:21,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 237 transitions, 532 flow [2022-07-13 21:58:21,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 237 transitions, 530 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:21,073 INFO L242 Difference]: Finished difference. Result has 237 places, 234 transitions, 504 flow [2022-07-13 21:58:21,074 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=504, PETRI_PLACES=237, PETRI_TRANSITIONS=234} [2022-07-13 21:58:21,074 INFO L279 CegarLoopForPetriNet]: 235 programPoint places, 2 predicate places. [2022-07-13 21:58:21,074 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 234 transitions, 504 flow [2022-07-13 21:58:21,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:21,075 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:21,075 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, 1, 1, 1] [2022-07-13 21:58:21,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:21,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:21,293 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:58:21,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:21,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1849767997, now seen corresponding path program 1 times [2022-07-13 21:58:21,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:21,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555754796] [2022-07-13 21:58:21,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:21,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:58:21,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:21,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555754796] [2022-07-13 21:58:21,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555754796] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:21,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718949254] [2022-07-13 21:58:21,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:21,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:21,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:21,336 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:58:21,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 21:58:21,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:21,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:58:21,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:21,426 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:58:21,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:21,448 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:58:21,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718949254] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:21,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:21,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:58:21,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328751755] [2022-07-13 21:58:21,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:21,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:58:21,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:21,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:58:21,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:58:21,451 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 275 [2022-07-13 21:58:21,453 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 234 transitions, 504 flow. Second operand has 10 states, 10 states have (on average 223.2) internal successors, (2232), 10 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:21,453 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:21,453 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 275 [2022-07-13 21:58:21,453 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:21,547 INFO L129 PetriNetUnfolder]: 7/338 cut-off events. [2022-07-13 21:58:21,547 INFO L130 PetriNetUnfolder]: For 20/24 co-relation queries the response was YES. [2022-07-13 21:58:21,550 INFO L84 FinitePrefix]: Finished finitePrefix Result has 393 conditions, 338 events. 7/338 cut-off events. For 20/24 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1121 event pairs, 0 based on Foata normal form. 2/326 useless extension candidates. Maximal degree in co-relation 385. Up to 11 conditions per place. [2022-07-13 21:58:21,551 INFO L132 encePairwiseOnDemand]: 269/275 looper letters, 14 selfloop transitions, 9 changer transitions 0/244 dead transitions. [2022-07-13 21:58:21,551 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 244 transitions, 572 flow [2022-07-13 21:58:21,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:58:21,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:58:21,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2014 transitions. [2022-07-13 21:58:21,554 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8137373737373738 [2022-07-13 21:58:21,554 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2014 transitions. [2022-07-13 21:58:21,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2014 transitions. [2022-07-13 21:58:21,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:21,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2014 transitions. [2022-07-13 21:58:21,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 223.77777777777777) internal successors, (2014), 9 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:21,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 275.0) internal successors, (2750), 10 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:21,561 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 275.0) internal successors, (2750), 10 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:21,561 INFO L186 Difference]: Start difference. First operand has 237 places, 234 transitions, 504 flow. Second operand 9 states and 2014 transitions. [2022-07-13 21:58:21,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 244 transitions, 572 flow [2022-07-13 21:58:21,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 244 transitions, 570 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:21,565 INFO L242 Difference]: Finished difference. Result has 247 places, 240 transitions, 552 flow [2022-07-13 21:58:21,565 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=552, PETRI_PLACES=247, PETRI_TRANSITIONS=240} [2022-07-13 21:58:21,566 INFO L279 CegarLoopForPetriNet]: 235 programPoint places, 12 predicate places. [2022-07-13 21:58:21,566 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 240 transitions, 552 flow [2022-07-13 21:58:21,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 223.2) internal successors, (2232), 10 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:21,566 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:21,567 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 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] [2022-07-13 21:58:21,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:21,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:21,783 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:58:21,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:21,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1597542211, now seen corresponding path program 2 times [2022-07-13 21:58:21,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:21,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422823512] [2022-07-13 21:58:21,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:21,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:21,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:21,873 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:58:21,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:21,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422823512] [2022-07-13 21:58:21,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422823512] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:21,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212282575] [2022-07-13 21:58:21,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 21:58:21,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:21,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:21,888 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:58:21,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 21:58:21,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 21:58:21,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:58:21,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:58:21,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:21,999 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:58:21,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:22,078 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:58:22,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212282575] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:22,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:22,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:58:22,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305125374] [2022-07-13 21:58:22,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:22,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:58:22,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:22,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:58:22,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:58:22,082 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 275 [2022-07-13 21:58:22,084 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 240 transitions, 552 flow. Second operand has 18 states, 18 states have (on average 223.33333333333334) internal successors, (4020), 18 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:22,084 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:22,084 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 275 [2022-07-13 21:58:22,085 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:22,268 INFO L129 PetriNetUnfolder]: 7/358 cut-off events. [2022-07-13 21:58:22,268 INFO L130 PetriNetUnfolder]: For 40/44 co-relation queries the response was YES. [2022-07-13 21:58:22,271 INFO L84 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 358 events. 7/358 cut-off events. For 40/44 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1121 event pairs, 0 based on Foata normal form. 4/348 useless extension candidates. Maximal degree in co-relation 472. Up to 11 conditions per place. [2022-07-13 21:58:22,272 INFO L132 encePairwiseOnDemand]: 269/275 looper letters, 22 selfloop transitions, 21 changer transitions 0/264 dead transitions. [2022-07-13 21:58:22,272 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 264 transitions, 746 flow [2022-07-13 21:58:22,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:58:22,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:58:22,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4688 transitions. [2022-07-13 21:58:22,279 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8117748917748918 [2022-07-13 21:58:22,280 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4688 transitions. [2022-07-13 21:58:22,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4688 transitions. [2022-07-13 21:58:22,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:22,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4688 transitions. [2022-07-13 21:58:22,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 223.23809523809524) internal successors, (4688), 21 states have internal predecessors, (4688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:22,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 275.0) internal successors, (6050), 22 states have internal predecessors, (6050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:22,295 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 275.0) internal successors, (6050), 22 states have internal predecessors, (6050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:22,295 INFO L186 Difference]: Start difference. First operand has 247 places, 240 transitions, 552 flow. Second operand 21 states and 4688 transitions. [2022-07-13 21:58:22,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 264 transitions, 746 flow [2022-07-13 21:58:22,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 264 transitions, 732 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:22,300 INFO L242 Difference]: Finished difference. Result has 271 places, 253 transitions, 676 flow [2022-07-13 21:58:22,300 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=676, PETRI_PLACES=271, PETRI_TRANSITIONS=253} [2022-07-13 21:58:22,301 INFO L279 CegarLoopForPetriNet]: 235 programPoint places, 36 predicate places. [2022-07-13 21:58:22,301 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 253 transitions, 676 flow [2022-07-13 21:58:22,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 223.33333333333334) internal successors, (4020), 18 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:22,302 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:22,302 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 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] [2022-07-13 21:58:22,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:22,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:22,520 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:58:22,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:22,521 INFO L85 PathProgramCache]: Analyzing trace with hash -755629635, now seen corresponding path program 3 times [2022-07-13 21:58:22,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:22,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259714073] [2022-07-13 21:58:22,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:22,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:22,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:58:22,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:22,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259714073] [2022-07-13 21:58:22,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259714073] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:22,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51222925] [2022-07-13 21:58:22,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 21:58:22,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:22,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:22,684 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:58:22,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 21:58:22,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-13 21:58:22,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:58:22,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:58:22,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:22,835 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:58:22,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:58:22,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51222925] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:22,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:22,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-07-13 21:58:22,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464883581] [2022-07-13 21:58:22,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:22,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 21:58:22,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:22,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 21:58:22,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-13 21:58:22,949 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 275 [2022-07-13 21:58:22,952 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 253 transitions, 676 flow. Second operand has 23 states, 23 states have (on average 223.47826086956522) internal successors, (5140), 23 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:22,952 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:22,952 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 275 [2022-07-13 21:58:22,952 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:23,275 INFO L129 PetriNetUnfolder]: 7/373 cut-off events. [2022-07-13 21:58:23,276 INFO L130 PetriNetUnfolder]: For 128/132 co-relation queries the response was YES. [2022-07-13 21:58:23,278 INFO L84 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 373 events. 7/373 cut-off events. For 128/132 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1121 event pairs, 0 based on Foata normal form. 3/362 useless extension candidates. Maximal degree in co-relation 568. Up to 17 conditions per place. [2022-07-13 21:58:23,279 INFO L132 encePairwiseOnDemand]: 269/275 looper letters, 28 selfloop transitions, 30 changer transitions 0/279 dead transitions. [2022-07-13 21:58:23,279 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 279 transitions, 938 flow [2022-07-13 21:58:23,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 21:58:23,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-13 21:58:23,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6691 transitions. [2022-07-13 21:58:23,285 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.811030303030303 [2022-07-13 21:58:23,286 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6691 transitions. [2022-07-13 21:58:23,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6691 transitions. [2022-07-13 21:58:23,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:23,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6691 transitions. [2022-07-13 21:58:23,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 223.03333333333333) internal successors, (6691), 30 states have internal predecessors, (6691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:23,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 275.0) internal successors, (8525), 31 states have internal predecessors, (8525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:23,303 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 275.0) internal successors, (8525), 31 states have internal predecessors, (8525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:23,303 INFO L186 Difference]: Start difference. First operand has 271 places, 253 transitions, 676 flow. Second operand 30 states and 6691 transitions. [2022-07-13 21:58:23,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 279 transitions, 938 flow [2022-07-13 21:58:23,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 279 transitions, 908 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-07-13 21:58:23,308 INFO L242 Difference]: Finished difference. Result has 298 places, 263 transitions, 804 flow [2022-07-13 21:58:23,309 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=804, PETRI_PLACES=298, PETRI_TRANSITIONS=263} [2022-07-13 21:58:23,309 INFO L279 CegarLoopForPetriNet]: 235 programPoint places, 63 predicate places. [2022-07-13 21:58:23,309 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 263 transitions, 804 flow [2022-07-13 21:58:23,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 223.47826086956522) internal successors, (5140), 23 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:23,310 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:23,310 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 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] [2022-07-13 21:58:23,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:23,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:23,527 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:58:23,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:23,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1849066191, now seen corresponding path program 4 times [2022-07-13 21:58:23,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:23,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705976274] [2022-07-13 21:58:23,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:23,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:58:23,547 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:58:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:58:23,567 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:58:23,568 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:58:23,568 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-13 21:58:23,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-13 21:58:23,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-13 21:58:23,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-13 21:58:23,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-13 21:58:23,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 21:58:23,569 INFO L356 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2022-07-13 21:58:23,569 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:58:23,569 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-13 21:58:23,590 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-13 21:58:23,592 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 298 places, 350 transitions, 730 flow [2022-07-13 21:58:23,648 INFO L129 PetriNetUnfolder]: 110/649 cut-off events. [2022-07-13 21:58:23,649 INFO L130 PetriNetUnfolder]: For 19/24 co-relation queries the response was YES. [2022-07-13 21:58:23,659 INFO L84 FinitePrefix]: Finished finitePrefix Result has 677 conditions, 649 events. 110/649 cut-off events. For 19/24 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2862 event pairs, 1 based on Foata normal form. 0/528 useless extension candidates. Maximal degree in co-relation 452. Up to 16 conditions per place. [2022-07-13 21:58:23,659 INFO L82 GeneralOperation]: Start removeDead. Operand has 298 places, 350 transitions, 730 flow [2022-07-13 21:58:23,666 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 298 places, 350 transitions, 730 flow [2022-07-13 21:58:23,667 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:58:23,667 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@22200cbc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5f05024d [2022-07-13 21:58:23,667 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-13 21:58:23,672 INFO L129 PetriNetUnfolder]: 13/134 cut-off events. [2022-07-13 21:58:23,672 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:58:23,672 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:23,673 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] [2022-07-13 21:58:23,673 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:58:23,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:23,673 INFO L85 PathProgramCache]: Analyzing trace with hash -2017601518, now seen corresponding path program 1 times [2022-07-13 21:58:23,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:23,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440246884] [2022-07-13 21:58:23,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:23,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:23,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:23,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440246884] [2022-07-13 21:58:23,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440246884] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:23,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:58:23,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:58:23,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652948208] [2022-07-13 21:58:23,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:23,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:58:23,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:23,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:58:23,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:58:23,696 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 350 [2022-07-13 21:58:23,697 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 350 transitions, 730 flow. Second operand has 3 states, 3 states have (on average 283.3333333333333) internal successors, (850), 3 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:23,697 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:23,697 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 350 [2022-07-13 21:58:23,697 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:23,769 INFO L129 PetriNetUnfolder]: 16/552 cut-off events. [2022-07-13 21:58:23,769 INFO L130 PetriNetUnfolder]: For 50/59 co-relation queries the response was YES. [2022-07-13 21:58:23,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 552 events. 16/552 cut-off events. For 50/59 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2480 event pairs, 1 based on Foata normal form. 207/728 useless extension candidates. Maximal degree in co-relation 402. Up to 23 conditions per place. [2022-07-13 21:58:23,778 INFO L132 encePairwiseOnDemand]: 296/350 looper letters, 15 selfloop transitions, 2 changer transitions 1/299 dead transitions. [2022-07-13 21:58:23,778 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 299 transitions, 662 flow [2022-07-13 21:58:23,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:58:23,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:58:23,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 916 transitions. [2022-07-13 21:58:23,780 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8723809523809524 [2022-07-13 21:58:23,780 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 916 transitions. [2022-07-13 21:58:23,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 916 transitions. [2022-07-13 21:58:23,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:23,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 916 transitions. [2022-07-13 21:58:23,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:23,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:23,783 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:23,783 INFO L186 Difference]: Start difference. First operand has 298 places, 350 transitions, 730 flow. Second operand 3 states and 916 transitions. [2022-07-13 21:58:23,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 299 transitions, 662 flow [2022-07-13 21:58:23,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 299 transitions, 662 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:58:23,787 INFO L242 Difference]: Finished difference. Result has 297 places, 295 transitions, 630 flow [2022-07-13 21:58:23,788 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=630, PETRI_PLACES=297, PETRI_TRANSITIONS=295} [2022-07-13 21:58:23,788 INFO L279 CegarLoopForPetriNet]: 298 programPoint places, -1 predicate places. [2022-07-13 21:58:23,788 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 295 transitions, 630 flow [2022-07-13 21:58:23,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.3333333333333) internal successors, (850), 3 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:23,789 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:23,789 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] [2022-07-13 21:58:23,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 21:58:23,789 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:58:23,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:23,789 INFO L85 PathProgramCache]: Analyzing trace with hash -115431363, now seen corresponding path program 1 times [2022-07-13 21:58:23,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:23,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594761641] [2022-07-13 21:58:23,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:23,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:23,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:23,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594761641] [2022-07-13 21:58:23,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594761641] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:23,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870359963] [2022-07-13 21:58:23,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:23,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:23,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:23,824 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:58:23,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 21:58:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:23,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 21:58:23,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:23,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:58:23,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:58:23,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870359963] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:23,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:58:23,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-13 21:58:23,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834690752] [2022-07-13 21:58:23,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:23,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:58:23,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:23,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:58:23,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:58:23,927 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 350 [2022-07-13 21:58:23,927 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 295 transitions, 630 flow. Second operand has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:23,928 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:23,928 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 350 [2022-07-13 21:58:23,928 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:24,005 INFO L129 PetriNetUnfolder]: 14/506 cut-off events. [2022-07-13 21:58:24,005 INFO L130 PetriNetUnfolder]: For 44/83 co-relation queries the response was YES. [2022-07-13 21:58:24,009 INFO L84 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 506 events. 14/506 cut-off events. For 44/83 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2174 event pairs, 1 based on Foata normal form. 1/481 useless extension candidates. Maximal degree in co-relation 538. Up to 30 conditions per place. [2022-07-13 21:58:24,011 INFO L132 encePairwiseOnDemand]: 347/350 looper letters, 15 selfloop transitions, 2 changer transitions 0/299 dead transitions. [2022-07-13 21:58:24,011 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 299 transitions, 672 flow [2022-07-13 21:58:24,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:58:24,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:58:24,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 864 transitions. [2022-07-13 21:58:24,013 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8228571428571428 [2022-07-13 21:58:24,013 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 864 transitions. [2022-07-13 21:58:24,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 864 transitions. [2022-07-13 21:58:24,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:24,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 864 transitions. [2022-07-13 21:58:24,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 288.0) internal successors, (864), 3 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:24,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:24,015 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:24,015 INFO L186 Difference]: Start difference. First operand has 297 places, 295 transitions, 630 flow. Second operand 3 states and 864 transitions. [2022-07-13 21:58:24,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 299 transitions, 672 flow [2022-07-13 21:58:24,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 299 transitions, 670 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:24,019 INFO L242 Difference]: Finished difference. Result has 298 places, 296 transitions, 640 flow [2022-07-13 21:58:24,020 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=640, PETRI_PLACES=298, PETRI_TRANSITIONS=296} [2022-07-13 21:58:24,020 INFO L279 CegarLoopForPetriNet]: 298 programPoint places, 0 predicate places. [2022-07-13 21:58:24,020 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 296 transitions, 640 flow [2022-07-13 21:58:24,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:24,021 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:24,021 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:58:24,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:24,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-13 21:58:24,255 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:58:24,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:24,255 INFO L85 PathProgramCache]: Analyzing trace with hash 417894738, now seen corresponding path program 1 times [2022-07-13 21:58:24,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:24,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175515107] [2022-07-13 21:58:24,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:24,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:24,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:58:24,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:24,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175515107] [2022-07-13 21:58:24,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175515107] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:24,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752668061] [2022-07-13 21:58:24,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:24,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:24,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:24,304 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:58:24,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 21:58:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:24,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:58:24,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:58:24,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:58:24,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752668061] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:24,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:24,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:58:24,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072747759] [2022-07-13 21:58:24,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:24,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:58:24,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:24,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:58:24,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:58:24,425 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 350 [2022-07-13 21:58:24,426 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 296 transitions, 640 flow. Second operand has 10 states, 10 states have (on average 283.1) internal successors, (2831), 10 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:24,426 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:24,426 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 350 [2022-07-13 21:58:24,426 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:24,554 INFO L129 PetriNetUnfolder]: 14/513 cut-off events. [2022-07-13 21:58:24,555 INFO L130 PetriNetUnfolder]: For 51/60 co-relation queries the response was YES. [2022-07-13 21:58:24,562 INFO L84 FinitePrefix]: Finished finitePrefix Result has 592 conditions, 513 events. 14/513 cut-off events. For 51/60 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2169 event pairs, 1 based on Foata normal form. 2/492 useless extension candidates. Maximal degree in co-relation 520. Up to 20 conditions per place. [2022-07-13 21:58:24,564 INFO L132 encePairwiseOnDemand]: 344/350 looper letters, 16 selfloop transitions, 9 changer transitions 0/306 dead transitions. [2022-07-13 21:58:24,564 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 306 transitions, 712 flow [2022-07-13 21:58:24,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:58:24,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:58:24,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2556 transitions. [2022-07-13 21:58:24,567 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8114285714285714 [2022-07-13 21:58:24,567 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2556 transitions. [2022-07-13 21:58:24,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2556 transitions. [2022-07-13 21:58:24,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:24,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2556 transitions. [2022-07-13 21:58:24,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:24,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 350.0) internal successors, (3500), 10 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:24,575 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 350.0) internal successors, (3500), 10 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:24,575 INFO L186 Difference]: Start difference. First operand has 298 places, 296 transitions, 640 flow. Second operand 9 states and 2556 transitions. [2022-07-13 21:58:24,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 306 transitions, 712 flow [2022-07-13 21:58:24,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 306 transitions, 710 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:24,580 INFO L242 Difference]: Finished difference. Result has 308 places, 302 transitions, 688 flow [2022-07-13 21:58:24,581 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=688, PETRI_PLACES=308, PETRI_TRANSITIONS=302} [2022-07-13 21:58:24,582 INFO L279 CegarLoopForPetriNet]: 298 programPoint places, 10 predicate places. [2022-07-13 21:58:24,582 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 302 transitions, 688 flow [2022-07-13 21:58:24,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 283.1) internal successors, (2831), 10 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:24,583 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:24,583 INFO L200 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1] [2022-07-13 21:58:24,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:24,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-13 21:58:24,801 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:58:24,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:24,801 INFO L85 PathProgramCache]: Analyzing trace with hash 575842066, now seen corresponding path program 2 times [2022-07-13 21:58:24,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:24,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167487352] [2022-07-13 21:58:24,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:24,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:24,842 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 21:58:24,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:24,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167487352] [2022-07-13 21:58:24,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167487352] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:24,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503995492] [2022-07-13 21:58:24,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 21:58:24,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:24,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:24,844 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:58:24,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 21:58:24,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 21:58:24,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:58:24,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:58:24,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:58:24,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:58:25,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503995492] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:25,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:25,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-07-13 21:58:25,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379797596] [2022-07-13 21:58:25,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:25,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 21:58:25,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:25,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 21:58:25,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-07-13 21:58:25,077 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 350 [2022-07-13 21:58:25,080 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 302 transitions, 688 flow. Second operand has 19 states, 19 states have (on average 277.05263157894734) internal successors, (5264), 19 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:25,080 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:25,080 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 350 [2022-07-13 21:58:25,080 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:25,324 INFO L129 PetriNetUnfolder]: 12/488 cut-off events. [2022-07-13 21:58:25,324 INFO L130 PetriNetUnfolder]: For 65/87 co-relation queries the response was YES. [2022-07-13 21:58:25,331 INFO L84 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 488 events. 12/488 cut-off events. For 65/87 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1763 event pairs, 2 based on Foata normal form. 6/473 useless extension candidates. Maximal degree in co-relation 498. Up to 29 conditions per place. [2022-07-13 21:58:25,332 INFO L132 encePairwiseOnDemand]: 339/350 looper letters, 35 selfloop transitions, 26 changer transitions 0/334 dead transitions. [2022-07-13 21:58:25,332 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 334 transitions, 936 flow [2022-07-13 21:58:25,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-13 21:58:25,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-13 21:58:25,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 6916 transitions. [2022-07-13 21:58:25,339 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7904 [2022-07-13 21:58:25,339 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 6916 transitions. [2022-07-13 21:58:25,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 6916 transitions. [2022-07-13 21:58:25,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:25,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 6916 transitions. [2022-07-13 21:58:25,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 276.64) internal successors, (6916), 25 states have internal predecessors, (6916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:25,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 350.0) internal successors, (9100), 26 states have internal predecessors, (9100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:25,355 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 350.0) internal successors, (9100), 26 states have internal predecessors, (9100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:25,355 INFO L186 Difference]: Start difference. First operand has 308 places, 302 transitions, 688 flow. Second operand 25 states and 6916 transitions. [2022-07-13 21:58:25,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 334 transitions, 936 flow [2022-07-13 21:58:25,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 334 transitions, 922 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:25,360 INFO L242 Difference]: Finished difference. Result has 339 places, 318 transitions, 846 flow [2022-07-13 21:58:25,361 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=846, PETRI_PLACES=339, PETRI_TRANSITIONS=318} [2022-07-13 21:58:25,361 INFO L279 CegarLoopForPetriNet]: 298 programPoint places, 41 predicate places. [2022-07-13 21:58:25,361 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 318 transitions, 846 flow [2022-07-13 21:58:25,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 277.05263157894734) internal successors, (5264), 19 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:25,362 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:25,362 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:58:25,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:25,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-13 21:58:25,576 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:58:25,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:25,576 INFO L85 PathProgramCache]: Analyzing trace with hash -302385302, now seen corresponding path program 1 times [2022-07-13 21:58:25,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:25,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619447188] [2022-07-13 21:58:25,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:25,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:25,752 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:25,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:25,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619447188] [2022-07-13 21:58:25,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619447188] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:25,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415119] [2022-07-13 21:58:25,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:25,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:25,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:25,754 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:58:25,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 21:58:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:25,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:58:25,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:25,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:26,041 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:26,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415119] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:26,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:26,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-07-13 21:58:26,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440080380] [2022-07-13 21:58:26,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:26,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 21:58:26,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:26,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 21:58:26,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-13 21:58:26,045 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 350 [2022-07-13 21:58:26,048 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 318 transitions, 846 flow. Second operand has 23 states, 23 states have (on average 283.4347826086956) internal successors, (6519), 23 states have internal predecessors, (6519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:26,048 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:26,048 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 350 [2022-07-13 21:58:26,048 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:26,408 INFO L129 PetriNetUnfolder]: 12/503 cut-off events. [2022-07-13 21:58:26,408 INFO L130 PetriNetUnfolder]: For 169/173 co-relation queries the response was YES. [2022-07-13 21:58:26,415 INFO L84 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 503 events. 12/503 cut-off events. For 169/173 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1767 event pairs, 2 based on Foata normal form. 3/485 useless extension candidates. Maximal degree in co-relation 531. Up to 20 conditions per place. [2022-07-13 21:58:26,417 INFO L132 encePairwiseOnDemand]: 344/350 looper letters, 30 selfloop transitions, 30 changer transitions 0/344 dead transitions. [2022-07-13 21:58:26,417 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 344 transitions, 1112 flow [2022-07-13 21:58:26,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 21:58:26,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-13 21:58:26,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8493 transitions. [2022-07-13 21:58:26,424 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8088571428571428 [2022-07-13 21:58:26,424 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8493 transitions. [2022-07-13 21:58:26,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8493 transitions. [2022-07-13 21:58:26,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:26,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8493 transitions. [2022-07-13 21:58:26,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 283.1) internal successors, (8493), 30 states have internal predecessors, (8493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:26,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 350.0) internal successors, (10850), 31 states have internal predecessors, (10850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:26,441 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 350.0) internal successors, (10850), 31 states have internal predecessors, (10850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:26,441 INFO L186 Difference]: Start difference. First operand has 339 places, 318 transitions, 846 flow. Second operand 30 states and 8493 transitions. [2022-07-13 21:58:26,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 344 transitions, 1112 flow [2022-07-13 21:58:26,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 344 transitions, 1078 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-07-13 21:58:26,492 INFO L242 Difference]: Finished difference. Result has 365 places, 328 transitions, 970 flow [2022-07-13 21:58:26,493 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=970, PETRI_PLACES=365, PETRI_TRANSITIONS=328} [2022-07-13 21:58:26,493 INFO L279 CegarLoopForPetriNet]: 298 programPoint places, 67 predicate places. [2022-07-13 21:58:26,493 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 328 transitions, 970 flow [2022-07-13 21:58:26,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 283.4347826086956) internal successors, (6519), 23 states have internal predecessors, (6519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:26,494 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:26,494 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:58:26,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:26,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 21:58:26,695 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:58:26,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:26,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1140146688, now seen corresponding path program 2 times [2022-07-13 21:58:26,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:26,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655871849] [2022-07-13 21:58:26,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:26,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-07-13 21:58:26,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:26,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655871849] [2022-07-13 21:58:26,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655871849] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:26,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:58:26,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-13 21:58:26,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891220451] [2022-07-13 21:58:26,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:26,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 21:58:26,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:26,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 21:58:26,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-07-13 21:58:26,966 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 350 [2022-07-13 21:58:26,967 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 328 transitions, 970 flow. Second operand has 15 states, 15 states have (on average 231.0) internal successors, (3465), 15 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:26,968 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:26,968 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 350 [2022-07-13 21:58:26,968 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:56,414 INFO L129 PetriNetUnfolder]: 62497/170320 cut-off events. [2022-07-13 21:58:56,415 INFO L130 PetriNetUnfolder]: For 13726/13745 co-relation queries the response was YES. [2022-07-13 21:58:58,590 INFO L84 FinitePrefix]: Finished finitePrefix Result has 270609 conditions, 170320 events. 62497/170320 cut-off events. For 13726/13745 co-relation queries the response was YES. Maximal size of possible extension queue 4973. Compared 2524319 event pairs, 41170 based on Foata normal form. 19/157532 useless extension candidates. Maximal degree in co-relation 270359. Up to 61103 conditions per place. [2022-07-13 21:58:59,439 INFO L132 encePairwiseOnDemand]: 332/350 looper letters, 264 selfloop transitions, 31 changer transitions 0/554 dead transitions. [2022-07-13 21:58:59,439 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 554 transitions, 2255 flow [2022-07-13 21:58:59,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 21:58:59,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-13 21:58:59,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5327 transitions. [2022-07-13 21:58:59,445 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6918181818181818 [2022-07-13 21:58:59,445 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5327 transitions. [2022-07-13 21:58:59,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5327 transitions. [2022-07-13 21:58:59,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:59,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5327 transitions. [2022-07-13 21:58:59,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 242.13636363636363) internal successors, (5327), 22 states have internal predecessors, (5327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:59,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 350.0) internal successors, (8050), 23 states have internal predecessors, (8050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:59,456 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 350.0) internal successors, (8050), 23 states have internal predecessors, (8050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:59,457 INFO L186 Difference]: Start difference. First operand has 365 places, 328 transitions, 970 flow. Second operand 22 states and 5327 transitions. [2022-07-13 21:58:59,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 554 transitions, 2255 flow [2022-07-13 21:58:59,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 554 transitions, 2211 flow, removed 4 selfloop flow, removed 18 redundant places. [2022-07-13 21:58:59,537 INFO L242 Difference]: Finished difference. Result has 378 places, 360 transitions, 1131 flow [2022-07-13 21:58:59,537 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=926, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1131, PETRI_PLACES=378, PETRI_TRANSITIONS=360} [2022-07-13 21:58:59,538 INFO L279 CegarLoopForPetriNet]: 298 programPoint places, 80 predicate places. [2022-07-13 21:58:59,538 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 360 transitions, 1131 flow [2022-07-13 21:58:59,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 231.0) internal successors, (3465), 15 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:59,539 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:59,539 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 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] [2022-07-13 21:58:59,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 21:58:59,540 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:58:59,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:59,540 INFO L85 PathProgramCache]: Analyzing trace with hash -2007247325, now seen corresponding path program 1 times [2022-07-13 21:58:59,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:59,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468313053] [2022-07-13 21:58:59,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:59,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:58:59,563 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:58:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:58:59,599 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:58:59,599 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:58:59,599 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-13 21:58:59,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-13 21:58:59,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-13 21:58:59,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-13 21:58:59,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-13 21:58:59,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-13 21:58:59,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 21:58:59,601 INFO L356 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2022-07-13 21:58:59,601 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:58:59,602 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-13 21:58:59,631 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-13 21:58:59,634 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 361 places, 425 transitions, 894 flow [2022-07-13 21:58:59,751 INFO L129 PetriNetUnfolder]: 157/922 cut-off events. [2022-07-13 21:58:59,752 INFO L130 PetriNetUnfolder]: For 48/54 co-relation queries the response was YES. [2022-07-13 21:58:59,769 INFO L84 FinitePrefix]: Finished finitePrefix Result has 977 conditions, 922 events. 157/922 cut-off events. For 48/54 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4423 event pairs, 6 based on Foata normal form. 0/756 useless extension candidates. Maximal degree in co-relation 669. Up to 32 conditions per place. [2022-07-13 21:58:59,769 INFO L82 GeneralOperation]: Start removeDead. Operand has 361 places, 425 transitions, 894 flow [2022-07-13 21:58:59,782 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 361 places, 425 transitions, 894 flow [2022-07-13 21:58:59,784 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:58:59,785 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@22200cbc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5f05024d [2022-07-13 21:58:59,785 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-13 21:58:59,790 INFO L129 PetriNetUnfolder]: 15/139 cut-off events. [2022-07-13 21:58:59,790 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:58:59,790 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:59,790 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] [2022-07-13 21:58:59,791 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:58:59,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:59,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1166343758, now seen corresponding path program 1 times [2022-07-13 21:58:59,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:59,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233234917] [2022-07-13 21:58:59,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:59,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:59,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:59,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:59,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:59,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233234917] [2022-07-13 21:58:59,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233234917] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:59,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:58:59,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:58:59,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070048784] [2022-07-13 21:58:59,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:59,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:58:59,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:59,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:58:59,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:58:59,806 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 425 [2022-07-13 21:58:59,807 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 425 transitions, 894 flow. Second operand has 2 states, 2 states have (on average 349.5) internal successors, (699), 2 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:59,807 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:59,807 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 425 [2022-07-13 21:58:59,807 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:59,935 INFO L129 PetriNetUnfolder]: 31/787 cut-off events. [2022-07-13 21:58:59,936 INFO L130 PetriNetUnfolder]: For 123/138 co-relation queries the response was YES. [2022-07-13 21:58:59,948 INFO L84 FinitePrefix]: Finished finitePrefix Result has 879 conditions, 787 events. 31/787 cut-off events. For 123/138 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3929 event pairs, 6 based on Foata normal form. 481/1223 useless extension candidates. Maximal degree in co-relation 583. Up to 37 conditions per place. [2022-07-13 21:58:59,950 INFO L132 encePairwiseOnDemand]: 362/425 looper letters, 8 selfloop transitions, 0 changer transitions 1/357 dead transitions. [2022-07-13 21:58:59,950 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 357 transitions, 774 flow [2022-07-13 21:58:59,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:58:59,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:58:59,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 769 transitions. [2022-07-13 21:58:59,952 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9047058823529411 [2022-07-13 21:58:59,952 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 769 transitions. [2022-07-13 21:58:59,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 769 transitions. [2022-07-13 21:58:59,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:59,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 769 transitions. [2022-07-13 21:58:59,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 384.5) internal successors, (769), 2 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:59,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 425.0) internal successors, (1275), 3 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:59,955 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 425.0) internal successors, (1275), 3 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:59,955 INFO L186 Difference]: Start difference. First operand has 361 places, 425 transitions, 894 flow. Second operand 2 states and 769 transitions. [2022-07-13 21:58:59,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 357 transitions, 774 flow [2022-07-13 21:58:59,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 357 transitions, 774 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:58:59,959 INFO L242 Difference]: Finished difference. Result has 357 places, 356 transitions, 756 flow [2022-07-13 21:58:59,960 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=756, PETRI_PLACES=357, PETRI_TRANSITIONS=356} [2022-07-13 21:58:59,960 INFO L279 CegarLoopForPetriNet]: 361 programPoint places, -4 predicate places. [2022-07-13 21:58:59,961 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 356 transitions, 756 flow [2022-07-13 21:58:59,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 349.5) internal successors, (699), 2 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:59,961 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:59,961 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] [2022-07-13 21:58:59,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 21:58:59,961 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:58:59,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:59,962 INFO L85 PathProgramCache]: Analyzing trace with hash -204729741, now seen corresponding path program 1 times [2022-07-13 21:58:59,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:59,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865116288] [2022-07-13 21:58:59,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:59,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:59,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:59,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865116288] [2022-07-13 21:58:59,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865116288] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:59,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:58:59,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:58:59,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948614814] [2022-07-13 21:58:59,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:59,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:58:59,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:59,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:58:59,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:58:59,976 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 342 out of 425 [2022-07-13 21:58:59,977 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 356 transitions, 756 flow. Second operand has 3 states, 3 states have (on average 343.0) internal successors, (1029), 3 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:59,977 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:59,977 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 342 of 425 [2022-07-13 21:58:59,977 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:00,183 INFO L129 PetriNetUnfolder]: 31/790 cut-off events. [2022-07-13 21:59:00,184 INFO L130 PetriNetUnfolder]: For 123/138 co-relation queries the response was YES. [2022-07-13 21:59:00,195 INFO L84 FinitePrefix]: Finished finitePrefix Result has 894 conditions, 790 events. 31/790 cut-off events. For 123/138 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3924 event pairs, 6 based on Foata normal form. 0/746 useless extension candidates. Maximal degree in co-relation 887. Up to 44 conditions per place. [2022-07-13 21:59:00,198 INFO L132 encePairwiseOnDemand]: 422/425 looper letters, 17 selfloop transitions, 2 changer transitions 0/360 dead transitions. [2022-07-13 21:59:00,198 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 360 transitions, 802 flow [2022-07-13 21:59:00,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:59:00,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:59:00,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1046 transitions. [2022-07-13 21:59:00,200 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8203921568627451 [2022-07-13 21:59:00,200 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1046 transitions. [2022-07-13 21:59:00,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1046 transitions. [2022-07-13 21:59:00,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:00,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1046 transitions. [2022-07-13 21:59:00,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:00,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:00,204 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:00,205 INFO L186 Difference]: Start difference. First operand has 357 places, 356 transitions, 756 flow. Second operand 3 states and 1046 transitions. [2022-07-13 21:59:00,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 360 transitions, 802 flow [2022-07-13 21:59:00,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 360 transitions, 802 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:59:00,210 INFO L242 Difference]: Finished difference. Result has 359 places, 357 transitions, 768 flow [2022-07-13 21:59:00,210 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=768, PETRI_PLACES=359, PETRI_TRANSITIONS=357} [2022-07-13 21:59:00,211 INFO L279 CegarLoopForPetriNet]: 361 programPoint places, -2 predicate places. [2022-07-13 21:59:00,211 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 357 transitions, 768 flow [2022-07-13 21:59:00,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 343.0) internal successors, (1029), 3 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:00,211 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:00,211 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] [2022-07-13 21:59:00,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-13 21:59:00,211 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:59:00,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:00,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1258974330, now seen corresponding path program 1 times [2022-07-13 21:59:00,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:00,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745112061] [2022-07-13 21:59:00,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:00,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:00,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:00,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:00,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:00,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745112061] [2022-07-13 21:59:00,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745112061] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:59:00,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694074025] [2022-07-13 21:59:00,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:00,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:00,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:00,256 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:59:00,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 21:59:00,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:00,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 21:59:00,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:59:00,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:59:00,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694074025] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:59:00,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:59:00,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-13 21:59:00,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981591500] [2022-07-13 21:59:00,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:59:00,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:59:00,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:00,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:59:00,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:59:00,351 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 342 out of 425 [2022-07-13 21:59:00,351 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 357 transitions, 768 flow. Second operand has 3 states, 3 states have (on average 343.0) internal successors, (1029), 3 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:00,351 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:00,351 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 342 of 425 [2022-07-13 21:59:00,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:00,460 INFO L129 PetriNetUnfolder]: 29/745 cut-off events. [2022-07-13 21:59:00,461 INFO L130 PetriNetUnfolder]: For 113/175 co-relation queries the response was YES. [2022-07-13 21:59:00,475 INFO L84 FinitePrefix]: Finished finitePrefix Result has 869 conditions, 745 events. 29/745 cut-off events. For 113/175 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3648 event pairs, 6 based on Foata normal form. 1/706 useless extension candidates. Maximal degree in co-relation 860. Up to 56 conditions per place. [2022-07-13 21:59:00,478 INFO L132 encePairwiseOnDemand]: 422/425 looper letters, 17 selfloop transitions, 2 changer transitions 0/361 dead transitions. [2022-07-13 21:59:00,478 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 361 transitions, 814 flow [2022-07-13 21:59:00,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:59:00,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:59:00,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1046 transitions. [2022-07-13 21:59:00,480 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8203921568627451 [2022-07-13 21:59:00,480 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1046 transitions. [2022-07-13 21:59:00,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1046 transitions. [2022-07-13 21:59:00,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:00,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1046 transitions. [2022-07-13 21:59:00,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:00,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:00,482 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:00,482 INFO L186 Difference]: Start difference. First operand has 359 places, 357 transitions, 768 flow. Second operand 3 states and 1046 transitions. [2022-07-13 21:59:00,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 361 transitions, 814 flow [2022-07-13 21:59:00,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 361 transitions, 812 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:59:00,487 INFO L242 Difference]: Finished difference. Result has 361 places, 358 transitions, 778 flow [2022-07-13 21:59:00,488 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=778, PETRI_PLACES=361, PETRI_TRANSITIONS=358} [2022-07-13 21:59:00,488 INFO L279 CegarLoopForPetriNet]: 361 programPoint places, 0 predicate places. [2022-07-13 21:59:00,488 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 358 transitions, 778 flow [2022-07-13 21:59:00,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 343.0) internal successors, (1029), 3 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:00,489 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:00,489 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, 1, 1, 1] [2022-07-13 21:59:00,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 21:59:00,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-13 21:59:00,706 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:59:00,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:00,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1713893572, now seen corresponding path program 1 times [2022-07-13 21:59:00,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:00,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851675086] [2022-07-13 21:59:00,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:00,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:00,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:59:00,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:00,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851675086] [2022-07-13 21:59:00,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851675086] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:59:00,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42306910] [2022-07-13 21:59:00,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:00,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:00,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:00,752 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:59:00,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 21:59:00,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:00,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:59:00,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:59:00,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:59:00,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42306910] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:00,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:59:00,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:59:00,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191197532] [2022-07-13 21:59:00,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:00,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:59:00,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:00,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:59:00,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:59:00,886 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 425 [2022-07-13 21:59:00,887 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 358 transitions, 778 flow. Second operand has 10 states, 10 states have (on average 343.1) internal successors, (3431), 10 states have internal predecessors, (3431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:00,887 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:00,888 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 425 [2022-07-13 21:59:00,888 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:01,032 INFO L129 PetriNetUnfolder]: 29/752 cut-off events. [2022-07-13 21:59:01,032 INFO L130 PetriNetUnfolder]: For 124/139 co-relation queries the response was YES. [2022-07-13 21:59:01,044 INFO L84 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 752 events. 29/752 cut-off events. For 124/139 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3640 event pairs, 6 based on Foata normal form. 2/718 useless extension candidates. Maximal degree in co-relation 872. Up to 41 conditions per place. [2022-07-13 21:59:01,047 INFO L132 encePairwiseOnDemand]: 419/425 looper letters, 18 selfloop transitions, 9 changer transitions 0/368 dead transitions. [2022-07-13 21:59:01,047 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 368 transitions, 854 flow [2022-07-13 21:59:01,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:59:01,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:59:01,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3098 transitions. [2022-07-13 21:59:01,051 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8099346405228758 [2022-07-13 21:59:01,051 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3098 transitions. [2022-07-13 21:59:01,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3098 transitions. [2022-07-13 21:59:01,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:01,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3098 transitions. [2022-07-13 21:59:01,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 344.22222222222223) internal successors, (3098), 9 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:01,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 425.0) internal successors, (4250), 10 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:01,059 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 425.0) internal successors, (4250), 10 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:01,059 INFO L186 Difference]: Start difference. First operand has 361 places, 358 transitions, 778 flow. Second operand 9 states and 3098 transitions. [2022-07-13 21:59:01,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 368 transitions, 854 flow [2022-07-13 21:59:01,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 368 transitions, 852 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:59:01,064 INFO L242 Difference]: Finished difference. Result has 371 places, 364 transitions, 826 flow [2022-07-13 21:59:01,065 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=826, PETRI_PLACES=371, PETRI_TRANSITIONS=364} [2022-07-13 21:59:01,065 INFO L279 CegarLoopForPetriNet]: 361 programPoint places, 10 predicate places. [2022-07-13 21:59:01,065 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 364 transitions, 826 flow [2022-07-13 21:59:01,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 343.1) internal successors, (3431), 10 states have internal predecessors, (3431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:01,066 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:01,066 INFO L200 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1] [2022-07-13 21:59:01,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 21:59:01,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-13 21:59:01,283 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:59:01,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:01,283 INFO L85 PathProgramCache]: Analyzing trace with hash -499580700, now seen corresponding path program 2 times [2022-07-13 21:59:01,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:01,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857601846] [2022-07-13 21:59:01,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:01,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 21:59:01,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:01,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857601846] [2022-07-13 21:59:01,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857601846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:59:01,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724786768] [2022-07-13 21:59:01,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 21:59:01,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:01,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:01,328 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:59:01,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 21:59:01,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 21:59:01,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:59:01,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:59:01,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:59:01,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:59:01,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724786768] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:01,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:59:01,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-07-13 21:59:01,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522673318] [2022-07-13 21:59:01,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:01,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 21:59:01,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:01,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 21:59:01,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-07-13 21:59:01,580 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 425 [2022-07-13 21:59:01,583 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 364 transitions, 826 flow. Second operand has 19 states, 19 states have (on average 337.05263157894734) internal successors, (6404), 19 states have internal predecessors, (6404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:01,583 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:01,583 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 425 [2022-07-13 21:59:01,583 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:01,867 INFO L129 PetriNetUnfolder]: 27/727 cut-off events. [2022-07-13 21:59:01,867 INFO L130 PetriNetUnfolder]: For 134/179 co-relation queries the response was YES. [2022-07-13 21:59:01,879 INFO L84 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 727 events. 27/727 cut-off events. For 134/179 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3309 event pairs, 7 based on Foata normal form. 6/699 useless extension candidates. Maximal degree in co-relation 939. Up to 56 conditions per place. [2022-07-13 21:59:01,881 INFO L132 encePairwiseOnDemand]: 414/425 looper letters, 37 selfloop transitions, 26 changer transitions 0/396 dead transitions. [2022-07-13 21:59:01,881 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 396 transitions, 1078 flow [2022-07-13 21:59:01,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-13 21:59:01,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-13 21:59:01,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 8418 transitions. [2022-07-13 21:59:01,894 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7922823529411764 [2022-07-13 21:59:01,894 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 8418 transitions. [2022-07-13 21:59:01,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 8418 transitions. [2022-07-13 21:59:01,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:01,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 8418 transitions. [2022-07-13 21:59:01,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 336.72) internal successors, (8418), 25 states have internal predecessors, (8418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:01,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 425.0) internal successors, (11050), 26 states have internal predecessors, (11050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:01,920 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 425.0) internal successors, (11050), 26 states have internal predecessors, (11050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:01,920 INFO L186 Difference]: Start difference. First operand has 371 places, 364 transitions, 826 flow. Second operand 25 states and 8418 transitions. [2022-07-13 21:59:01,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 396 transitions, 1078 flow [2022-07-13 21:59:01,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 396 transitions, 1064 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:59:01,927 INFO L242 Difference]: Finished difference. Result has 402 places, 380 transitions, 984 flow [2022-07-13 21:59:01,928 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=984, PETRI_PLACES=402, PETRI_TRANSITIONS=380} [2022-07-13 21:59:01,928 INFO L279 CegarLoopForPetriNet]: 361 programPoint places, 41 predicate places. [2022-07-13 21:59:01,928 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 380 transitions, 984 flow [2022-07-13 21:59:01,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 337.05263157894734) internal successors, (6404), 19 states have internal predecessors, (6404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:01,929 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:01,929 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:01,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 21:59:02,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:02,146 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:59:02,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:02,146 INFO L85 PathProgramCache]: Analyzing trace with hash 546551868, now seen corresponding path program 1 times [2022-07-13 21:59:02,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:02,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727532658] [2022-07-13 21:59:02,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:02,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:02,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:02,270 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:02,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:02,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727532658] [2022-07-13 21:59:02,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727532658] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:59:02,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651635253] [2022-07-13 21:59:02,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:02,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:02,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:02,278 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:59:02,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 21:59:02,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:02,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:59:02,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:02,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:02,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651635253] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:02,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:59:02,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-07-13 21:59:02,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83976007] [2022-07-13 21:59:02,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:02,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 21:59:02,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:02,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 21:59:02,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-13 21:59:02,516 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 425 [2022-07-13 21:59:02,518 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 380 transitions, 984 flow. Second operand has 23 states, 23 states have (on average 343.4347826086956) internal successors, (7899), 23 states have internal predecessors, (7899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:02,519 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:02,519 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 425 [2022-07-13 21:59:02,519 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:02,938 INFO L129 PetriNetUnfolder]: 27/742 cut-off events. [2022-07-13 21:59:02,939 INFO L130 PetriNetUnfolder]: For 244/253 co-relation queries the response was YES. [2022-07-13 21:59:02,947 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1049 conditions, 742 events. 27/742 cut-off events. For 244/253 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3314 event pairs, 7 based on Foata normal form. 3/711 useless extension candidates. Maximal degree in co-relation 1029. Up to 41 conditions per place. [2022-07-13 21:59:02,949 INFO L132 encePairwiseOnDemand]: 419/425 looper letters, 32 selfloop transitions, 30 changer transitions 0/406 dead transitions. [2022-07-13 21:59:02,949 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 406 transitions, 1254 flow [2022-07-13 21:59:02,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 21:59:02,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-13 21:59:02,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 10295 transitions. [2022-07-13 21:59:02,954 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8074509803921569 [2022-07-13 21:59:02,954 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 10295 transitions. [2022-07-13 21:59:02,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 10295 transitions. [2022-07-13 21:59:02,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:02,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 10295 transitions. [2022-07-13 21:59:02,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 343.1666666666667) internal successors, (10295), 30 states have internal predecessors, (10295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:02,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 425.0) internal successors, (13175), 31 states have internal predecessors, (13175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:02,970 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 425.0) internal successors, (13175), 31 states have internal predecessors, (13175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:02,970 INFO L186 Difference]: Start difference. First operand has 402 places, 380 transitions, 984 flow. Second operand 30 states and 10295 transitions. [2022-07-13 21:59:02,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 406 transitions, 1254 flow [2022-07-13 21:59:02,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 406 transitions, 1220 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-07-13 21:59:02,976 INFO L242 Difference]: Finished difference. Result has 428 places, 390 transitions, 1108 flow [2022-07-13 21:59:02,977 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1108, PETRI_PLACES=428, PETRI_TRANSITIONS=390} [2022-07-13 21:59:02,977 INFO L279 CegarLoopForPetriNet]: 361 programPoint places, 67 predicate places. [2022-07-13 21:59:02,977 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 390 transitions, 1108 flow [2022-07-13 21:59:02,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 343.4347826086956) internal successors, (7899), 23 states have internal predecessors, (7899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:02,978 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:02,978 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:02,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-13 21:59:03,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:03,195 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:59:03,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:03,196 INFO L85 PathProgramCache]: Analyzing trace with hash 961894633, now seen corresponding path program 2 times [2022-07-13 21:59:03,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:03,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574295058] [2022-07-13 21:59:03,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:03,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-07-13 21:59:03,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:03,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574295058] [2022-07-13 21:59:03,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574295058] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:59:03,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:59:03,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-13 21:59:03,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426685689] [2022-07-13 21:59:03,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:59:03,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 21:59:03,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:03,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 21:59:03,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-07-13 21:59:03,495 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 425 [2022-07-13 21:59:03,502 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 390 transitions, 1108 flow. Second operand has 15 states, 15 states have (on average 284.0) internal successors, (4260), 15 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:03,503 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:03,503 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 425 [2022-07-13 21:59:03,503 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand