./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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_12-ptr_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7cd6aaa75855c8ee03a174376352b142cf57dd56532b968b1b6c916585172927 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:50:53,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:50:53,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:50:53,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:50:53,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:50:53,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:50:53,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:50:53,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:50:53,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:50:53,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:50:53,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:50:53,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:50:53,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:50:53,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:50:53,451 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:50:53,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:50:53,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:50:53,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:50:53,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:50:53,468 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:50:53,469 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:50:53,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:50:53,471 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:50:53,472 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:50:53,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:50:53,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:50:53,477 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:50:53,477 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:50:53,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:50:53,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:50:53,478 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:50:53,478 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:50:53,479 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:50:53,479 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:50:53,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:50:53,480 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:50:53,480 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:50:53,481 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:50:53,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:50:53,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:50:53,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:50:53,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:50:53,483 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:50:53,504 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:50:53,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:50:53,505 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:50:53,505 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:50:53,505 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:50:53,506 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:50:53,506 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:50:53,507 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:50:53,507 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:50:53,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:50:53,508 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:50:53,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:50:53,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:50:53,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:50:53,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:50:53,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:50:53,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:50:53,509 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:50:53,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:50:53,509 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:50:53,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:50:53,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:50:53,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:50:53,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:50:53,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:50:53,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:50:53,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:50:53,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:50:53,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:50:53,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:50:53,511 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:50:53,512 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:50:53,512 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:50:53,512 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cd6aaa75855c8ee03a174376352b142cf57dd56532b968b1b6c916585172927 [2022-07-21 08:50:53,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:50:53,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:50:53,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:50:53,823 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:50:53,823 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:50:53,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i [2022-07-21 08:50:53,873 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23a96ba7f/fbed19e6e1c04645b499e28e8a0baf90/FLAGb88537195 [2022-07-21 08:50:54,297 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:50:54,297 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i [2022-07-21 08:50:54,314 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23a96ba7f/fbed19e6e1c04645b499e28e8a0baf90/FLAGb88537195 [2022-07-21 08:50:54,325 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23a96ba7f/fbed19e6e1c04645b499e28e8a0baf90 [2022-07-21 08:50:54,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:50:54,327 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:50:54,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:50:54,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:50:54,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:50:54,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:50:54" (1/1) ... [2022-07-21 08:50:54,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@305ac8bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:54, skipping insertion in model container [2022-07-21 08:50:54,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:50:54" (1/1) ... [2022-07-21 08:50:54,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:50:54,380 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:50:54,646 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_12-ptr_racefree.i[30176,30189] [2022-07-21 08:50:54,668 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:50:54,679 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:50:54,710 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_12-ptr_racefree.i[30176,30189] [2022-07-21 08:50:54,716 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:50:54,747 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:50:54,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:54 WrapperNode [2022-07-21 08:50:54,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:50:54,748 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:50:54,748 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:50:54,748 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:50:54,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:54" (1/1) ... [2022-07-21 08:50:54,776 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:54" (1/1) ... [2022-07-21 08:50:54,800 INFO L137 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2022-07-21 08:50:54,800 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:50:54,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:50:54,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:50:54,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:50:54,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:54" (1/1) ... [2022-07-21 08:50:54,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:54" (1/1) ... [2022-07-21 08:50:54,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:54" (1/1) ... [2022-07-21 08:50:54,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:54" (1/1) ... [2022-07-21 08:50:54,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:54" (1/1) ... [2022-07-21 08:50:54,815 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:54" (1/1) ... [2022-07-21 08:50:54,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:54" (1/1) ... [2022-07-21 08:50:54,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:50:54,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:50:54,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:50:54,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:50:54,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:54" (1/1) ... [2022-07-21 08:50:54,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:50:54,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:50:54,858 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) [2022-07-21 08:50:54,859 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 [2022-07-21 08:50:54,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 08:50:54,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:50:54,886 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-21 08:50:54,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:50:54,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:50:54,900 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-21 08:50:54,901 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-21 08:50:54,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:50:54,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:50:54,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:50:54,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:50:54,903 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 08:50:55,020 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:50:55,021 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:50:55,250 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:50:55,255 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:50:55,255 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-21 08:50:55,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:50:55 BoogieIcfgContainer [2022-07-21 08:50:55,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:50:55,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:50:55,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:50:55,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:50:55,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:50:54" (1/3) ... [2022-07-21 08:50:55,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f22d5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:50:55, skipping insertion in model container [2022-07-21 08:50:55,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:54" (2/3) ... [2022-07-21 08:50:55,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f22d5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:50:55, skipping insertion in model container [2022-07-21 08:50:55,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:50:55" (3/3) ... [2022-07-21 08:50:55,263 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_12-ptr_racefree.i [2022-07-21 08:50:55,266 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:50:55,274 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:50:55,274 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 08:50:55,274 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:50:55,337 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-21 08:50:55,370 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 114 places, 123 transitions, 254 flow [2022-07-21 08:50:55,440 INFO L129 PetriNetUnfolder]: 17/161 cut-off events. [2022-07-21 08:50:55,441 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:50:55,444 INFO L84 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 161 events. 17/161 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 384 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2022-07-21 08:50:55,444 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 123 transitions, 254 flow [2022-07-21 08:50:55,449 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 118 transitions, 241 flow [2022-07-21 08:50:55,460 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:50:55,465 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@9941552, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@186df81b [2022-07-21 08:50:55,466 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:50:55,499 INFO L129 PetriNetUnfolder]: 6/97 cut-off events. [2022-07-21 08:50:55,499 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:50:55,500 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:55,501 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:55,501 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:55,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:55,505 INFO L85 PathProgramCache]: Analyzing trace with hash -41465577, now seen corresponding path program 1 times [2022-07-21 08:50:55,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:55,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76225418] [2022-07-21 08:50:55,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:55,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:55,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:55,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:55,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76225418] [2022-07-21 08:50:55,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76225418] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:55,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:55,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:50:55,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515262817] [2022-07-21 08:50:55,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:55,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:50:55,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:55,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:50:55,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:50:55,737 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 123 [2022-07-21 08:50:55,741 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 118 transitions, 241 flow. Second operand has 2 states, 2 states have (on average 109.5) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:55,741 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:55,742 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 123 [2022-07-21 08:50:55,742 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:55,780 INFO L129 PetriNetUnfolder]: 0/138 cut-off events. [2022-07-21 08:50:55,781 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:50:55,781 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 138 events. 0/138 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 215 event pairs, 0 based on Foata normal form. 16/148 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-07-21 08:50:55,782 INFO L132 encePairwiseOnDemand]: 112/123 looper letters, 1 selfloop transitions, 0 changer transitions 16/106 dead transitions. [2022-07-21 08:50:55,782 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 106 transitions, 219 flow [2022-07-21 08:50:55,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:50:55,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:50:55,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 230 transitions. [2022-07-21 08:50:55,795 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9349593495934959 [2022-07-21 08:50:55,796 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 230 transitions. [2022-07-21 08:50:55,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 230 transitions. [2022-07-21 08:50:55,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:55,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 230 transitions. [2022-07-21 08:50:55,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 115.0) internal successors, (230), 2 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:55,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:55,809 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:55,811 INFO L186 Difference]: Start difference. First operand has 110 places, 118 transitions, 241 flow. Second operand 2 states and 230 transitions. [2022-07-21 08:50:55,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 106 transitions, 219 flow [2022-07-21 08:50:55,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 106 transitions, 219 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:55,816 INFO L242 Difference]: Finished difference. Result has 110 places, 90 transitions, 185 flow [2022-07-21 08:50:55,818 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=185, PETRI_PLACES=110, PETRI_TRANSITIONS=90} [2022-07-21 08:50:55,821 INFO L279 CegarLoopForPetriNet]: 110 programPoint places, 0 predicate places. [2022-07-21 08:50:55,821 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 90 transitions, 185 flow [2022-07-21 08:50:55,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 109.5) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:55,822 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:55,822 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:55,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:50:55,823 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:55,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:55,824 INFO L85 PathProgramCache]: Analyzing trace with hash 87617142, now seen corresponding path program 1 times [2022-07-21 08:50:55,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:55,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153428278] [2022-07-21 08:50:55,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:55,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:55,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:55,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:55,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153428278] [2022-07-21 08:50:55,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153428278] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:55,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:55,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:50:55,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989204747] [2022-07-21 08:50:55,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:55,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:50:55,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:55,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:50:55,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:50:55,920 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 123 [2022-07-21 08:50:55,920 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 90 transitions, 185 flow. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:55,921 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:55,921 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 123 [2022-07-21 08:50:55,921 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:55,945 INFO L129 PetriNetUnfolder]: 0/94 cut-off events. [2022-07-21 08:50:55,946 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:50:55,947 INFO L84 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 94 events. 0/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-21 08:50:55,948 INFO L132 encePairwiseOnDemand]: 120/123 looper letters, 8 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2022-07-21 08:50:55,948 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 92 transitions, 209 flow [2022-07-21 08:50:55,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:50:55,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:50:55,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 317 transitions. [2022-07-21 08:50:55,952 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8590785907859079 [2022-07-21 08:50:55,952 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 317 transitions. [2022-07-21 08:50:55,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 317 transitions. [2022-07-21 08:50:55,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:55,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 317 transitions. [2022-07-21 08:50:55,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:55,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:55,955 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:55,955 INFO L186 Difference]: Start difference. First operand has 110 places, 90 transitions, 185 flow. Second operand 3 states and 317 transitions. [2022-07-21 08:50:55,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 92 transitions, 209 flow [2022-07-21 08:50:55,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 92 transitions, 209 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:55,958 INFO L242 Difference]: Finished difference. Result has 97 places, 90 transitions, 193 flow [2022-07-21 08:50:55,959 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=193, PETRI_PLACES=97, PETRI_TRANSITIONS=90} [2022-07-21 08:50:55,959 INFO L279 CegarLoopForPetriNet]: 110 programPoint places, -13 predicate places. [2022-07-21 08:50:55,959 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 90 transitions, 193 flow [2022-07-21 08:50:55,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:55,960 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:55,960 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] [2022-07-21 08:50:55,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:50:55,961 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:55,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:55,962 INFO L85 PathProgramCache]: Analyzing trace with hash -228267936, now seen corresponding path program 1 times [2022-07-21 08:50:55,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:55,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490233840] [2022-07-21 08:50:55,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:55,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:56,000 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:50:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:56,036 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:50:56,036 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:50:56,037 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:50:56,038 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:50:56,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:50:56,039 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-21 08:50:56,040 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:50:56,040 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-21 08:50:56,055 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 08:50:56,057 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 144 places, 158 transitions, 334 flow [2022-07-21 08:50:56,098 INFO L129 PetriNetUnfolder]: 31/259 cut-off events. [2022-07-21 08:50:56,098 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-21 08:50:56,102 INFO L84 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 259 events. 31/259 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 773 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 163. Up to 8 conditions per place. [2022-07-21 08:50:56,103 INFO L82 GeneralOperation]: Start removeDead. Operand has 144 places, 158 transitions, 334 flow [2022-07-21 08:50:56,105 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 158 transitions, 334 flow [2022-07-21 08:50:56,108 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:50:56,112 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@9941552, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@186df81b [2022-07-21 08:50:56,112 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:50:56,119 INFO L129 PetriNetUnfolder]: 5/96 cut-off events. [2022-07-21 08:50:56,119 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:50:56,119 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:56,120 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:56,120 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:56,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:56,121 INFO L85 PathProgramCache]: Analyzing trace with hash 2129631895, now seen corresponding path program 1 times [2022-07-21 08:50:56,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:56,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783651845] [2022-07-21 08:50:56,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:56,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:56,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:56,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783651845] [2022-07-21 08:50:56,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783651845] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:56,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:56,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:50:56,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483081080] [2022-07-21 08:50:56,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:56,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:50:56,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:56,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:50:56,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:50:56,178 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 158 [2022-07-21 08:50:56,180 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 158 transitions, 334 flow. Second operand has 2 states, 2 states have (on average 136.5) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:56,180 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:56,180 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 158 [2022-07-21 08:50:56,180 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:56,208 INFO L129 PetriNetUnfolder]: 3/228 cut-off events. [2022-07-21 08:50:56,209 INFO L130 PetriNetUnfolder]: For 20/26 co-relation queries the response was YES. [2022-07-21 08:50:56,209 INFO L84 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 228 events. 3/228 cut-off events. For 20/26 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 575 event pairs, 0 based on Foata normal form. 42/260 useless extension candidates. Maximal degree in co-relation 147. Up to 7 conditions per place. [2022-07-21 08:50:56,210 INFO L132 encePairwiseOnDemand]: 141/158 looper letters, 2 selfloop transitions, 0 changer transitions 22/140 dead transitions. [2022-07-21 08:50:56,210 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 140 transitions, 306 flow [2022-07-21 08:50:56,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:50:56,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:50:56,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 293 transitions. [2022-07-21 08:50:56,214 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9272151898734177 [2022-07-21 08:50:56,214 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 293 transitions. [2022-07-21 08:50:56,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 293 transitions. [2022-07-21 08:50:56,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:56,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 293 transitions. [2022-07-21 08:50:56,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 146.5) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:56,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:56,217 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:56,217 INFO L186 Difference]: Start difference. First operand has 144 places, 158 transitions, 334 flow. Second operand 2 states and 293 transitions. [2022-07-21 08:50:56,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 140 transitions, 306 flow [2022-07-21 08:50:56,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 140 transitions, 306 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:56,220 INFO L242 Difference]: Finished difference. Result has 144 places, 118 transitions, 248 flow [2022-07-21 08:50:56,220 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=248, PETRI_PLACES=144, PETRI_TRANSITIONS=118} [2022-07-21 08:50:56,220 INFO L279 CegarLoopForPetriNet]: 144 programPoint places, 0 predicate places. [2022-07-21 08:50:56,221 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 118 transitions, 248 flow [2022-07-21 08:50:56,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 136.5) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:56,222 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:56,222 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:56,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 08:50:56,222 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:56,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:56,223 INFO L85 PathProgramCache]: Analyzing trace with hash -2036252682, now seen corresponding path program 1 times [2022-07-21 08:50:56,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:56,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077178431] [2022-07-21 08:50:56,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:56,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:56,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:56,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077178431] [2022-07-21 08:50:56,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077178431] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:56,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:56,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:50:56,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043759153] [2022-07-21 08:50:56,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:56,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:50:56,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:56,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:50:56,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:50:56,256 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 158 [2022-07-21 08:50:56,257 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 118 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:56,257 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:56,257 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 158 [2022-07-21 08:50:56,257 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:56,286 INFO L129 PetriNetUnfolder]: 0/143 cut-off events. [2022-07-21 08:50:56,286 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 08:50:56,286 INFO L84 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 143 events. 0/143 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 213 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-07-21 08:50:56,287 INFO L132 encePairwiseOnDemand]: 155/158 looper letters, 11 selfloop transitions, 2 changer transitions 0/122 dead transitions. [2022-07-21 08:50:56,287 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 122 transitions, 282 flow [2022-07-21 08:50:56,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:50:56,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:50:56,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 401 transitions. [2022-07-21 08:50:56,289 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8459915611814346 [2022-07-21 08:50:56,289 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 401 transitions. [2022-07-21 08:50:56,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 401 transitions. [2022-07-21 08:50:56,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:56,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 401 transitions. [2022-07-21 08:50:56,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:56,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:56,293 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:56,293 INFO L186 Difference]: Start difference. First operand has 144 places, 118 transitions, 248 flow. Second operand 3 states and 401 transitions. [2022-07-21 08:50:56,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 122 transitions, 282 flow [2022-07-21 08:50:56,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 122 transitions, 280 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:56,298 INFO L242 Difference]: Finished difference. Result has 127 places, 119 transitions, 258 flow [2022-07-21 08:50:56,299 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=258, PETRI_PLACES=127, PETRI_TRANSITIONS=119} [2022-07-21 08:50:56,300 INFO L279 CegarLoopForPetriNet]: 144 programPoint places, -17 predicate places. [2022-07-21 08:50:56,300 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 119 transitions, 258 flow [2022-07-21 08:50:56,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:56,301 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:56,301 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:56,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 08:50:56,301 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:56,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:56,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1109826934, now seen corresponding path program 1 times [2022-07-21 08:50:56,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:56,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035335354] [2022-07-21 08:50:56,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:56,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:56,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:56,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:56,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035335354] [2022-07-21 08:50:56,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035335354] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:50:56,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389219502] [2022-07-21 08:50:56,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:56,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:50:56,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:50:56,367 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) [2022-07-21 08:50:56,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 08:50:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:56,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:50:56,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:50:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:56,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:50:56,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:56,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389219502] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:50:56,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:50:56,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:50:56,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116018416] [2022-07-21 08:50:56,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:50:56,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:50:56,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:56,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:50:56,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:50:56,585 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 158 [2022-07-21 08:50:56,587 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 119 transitions, 258 flow. Second operand has 10 states, 10 states have (on average 130.3) internal successors, (1303), 10 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:56,587 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:56,587 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 158 [2022-07-21 08:50:56,587 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:56,646 INFO L129 PetriNetUnfolder]: 0/119 cut-off events. [2022-07-21 08:50:56,646 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 08:50:56,646 INFO L84 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 119 events. 0/119 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 93 event pairs, 0 based on Foata normal form. 2/121 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-07-21 08:50:56,646 INFO L132 encePairwiseOnDemand]: 153/158 looper letters, 9 selfloop transitions, 7 changer transitions 0/113 dead transitions. [2022-07-21 08:50:56,646 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 113 transitions, 276 flow [2022-07-21 08:50:56,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:50:56,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:50:56,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1170 transitions. [2022-07-21 08:50:56,649 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8227848101265823 [2022-07-21 08:50:56,649 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1170 transitions. [2022-07-21 08:50:56,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1170 transitions. [2022-07-21 08:50:56,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:56,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1170 transitions. [2022-07-21 08:50:56,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 130.0) internal successors, (1170), 9 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:56,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 158.0) internal successors, (1580), 10 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:56,653 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 158.0) internal successors, (1580), 10 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:56,653 INFO L186 Difference]: Start difference. First operand has 127 places, 119 transitions, 258 flow. Second operand 9 states and 1170 transitions. [2022-07-21 08:50:56,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 113 transitions, 276 flow [2022-07-21 08:50:56,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 113 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:50:56,655 INFO L242 Difference]: Finished difference. Result has 122 places, 109 transitions, 248 flow [2022-07-21 08:50:56,656 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=248, PETRI_PLACES=122, PETRI_TRANSITIONS=109} [2022-07-21 08:50:56,656 INFO L279 CegarLoopForPetriNet]: 144 programPoint places, -22 predicate places. [2022-07-21 08:50:56,656 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 109 transitions, 248 flow [2022-07-21 08:50:56,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 130.3) internal successors, (1303), 10 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:56,657 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:56,657 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] [2022-07-21 08:50:56,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 08:50:56,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-21 08:50:56,872 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:56,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:56,872 INFO L85 PathProgramCache]: Analyzing trace with hash -253022611, now seen corresponding path program 1 times [2022-07-21 08:50:56,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:56,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775624840] [2022-07-21 08:50:56,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:56,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:56,888 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:50:56,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:56,906 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:50:56,909 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:50:56,910 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:50:56,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:50:56,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 08:50:56,910 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-21 08:50:56,911 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:50:56,911 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-21 08:50:56,937 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-21 08:50:56,942 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 174 places, 193 transitions, 416 flow [2022-07-21 08:50:56,982 INFO L129 PetriNetUnfolder]: 50/390 cut-off events. [2022-07-21 08:50:56,983 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-21 08:50:56,985 INFO L84 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 390 events. 50/390 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1329 event pairs, 1 based on Foata normal form. 0/332 useless extension candidates. Maximal degree in co-relation 267. Up to 16 conditions per place. [2022-07-21 08:50:56,985 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 193 transitions, 416 flow [2022-07-21 08:50:56,988 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 193 transitions, 416 flow [2022-07-21 08:50:56,988 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:50:56,989 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@9941552, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@186df81b [2022-07-21 08:50:56,989 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:50:56,993 INFO L129 PetriNetUnfolder]: 3/87 cut-off events. [2022-07-21 08:50:56,993 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:50:56,993 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:56,993 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:56,993 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:56,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:56,994 INFO L85 PathProgramCache]: Analyzing trace with hash 622618071, now seen corresponding path program 1 times [2022-07-21 08:50:56,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:56,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950113474] [2022-07-21 08:50:56,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:56,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:57,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:57,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:57,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:57,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950113474] [2022-07-21 08:50:57,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950113474] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:57,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:57,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:50:57,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183423344] [2022-07-21 08:50:57,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:57,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:50:57,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:57,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:50:57,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:50:57,022 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 193 [2022-07-21 08:50:57,022 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 193 transitions, 416 flow. Second operand has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:57,023 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:57,023 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 193 [2022-07-21 08:50:57,024 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:57,087 INFO L129 PetriNetUnfolder]: 8/344 cut-off events. [2022-07-21 08:50:57,087 INFO L130 PetriNetUnfolder]: For 55/69 co-relation queries the response was YES. [2022-07-21 08:50:57,089 INFO L84 FinitePrefix]: Finished finitePrefix Result has 388 conditions, 344 events. 8/344 cut-off events. For 55/69 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1102 event pairs, 1 based on Foata normal form. 104/432 useless extension candidates. Maximal degree in co-relation 242. Up to 16 conditions per place. [2022-07-21 08:50:57,090 INFO L132 encePairwiseOnDemand]: 170/193 looper letters, 3 selfloop transitions, 0 changer transitions 23/169 dead transitions. [2022-07-21 08:50:57,090 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 169 transitions, 380 flow [2022-07-21 08:50:57,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:50:57,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:50:57,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 355 transitions. [2022-07-21 08:50:57,092 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9196891191709845 [2022-07-21 08:50:57,092 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 355 transitions. [2022-07-21 08:50:57,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 355 transitions. [2022-07-21 08:50:57,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:57,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 355 transitions. [2022-07-21 08:50:57,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 177.5) internal successors, (355), 2 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:57,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:57,094 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:57,094 INFO L186 Difference]: Start difference. First operand has 174 places, 193 transitions, 416 flow. Second operand 2 states and 355 transitions. [2022-07-21 08:50:57,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 169 transitions, 380 flow [2022-07-21 08:50:57,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 169 transitions, 380 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:57,097 INFO L242 Difference]: Finished difference. Result has 174 places, 146 transitions, 313 flow [2022-07-21 08:50:57,098 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=313, PETRI_PLACES=174, PETRI_TRANSITIONS=146} [2022-07-21 08:50:57,098 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 0 predicate places. [2022-07-21 08:50:57,098 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 146 transitions, 313 flow [2022-07-21 08:50:57,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:57,099 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:57,099 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:57,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 08:50:57,100 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:57,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:57,100 INFO L85 PathProgramCache]: Analyzing trace with hash 751700790, now seen corresponding path program 1 times [2022-07-21 08:50:57,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:57,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782985605] [2022-07-21 08:50:57,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:57,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:57,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:57,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:57,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782985605] [2022-07-21 08:50:57,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782985605] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:57,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:57,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:50:57,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237114290] [2022-07-21 08:50:57,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:57,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:50:57,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:57,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:50:57,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:50:57,140 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 193 [2022-07-21 08:50:57,141 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 146 transitions, 313 flow. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:57,141 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:57,141 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 193 [2022-07-21 08:50:57,141 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:57,171 INFO L129 PetriNetUnfolder]: 0/192 cut-off events. [2022-07-21 08:50:57,171 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-21 08:50:57,172 INFO L84 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 192 events. 0/192 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 399 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-07-21 08:50:57,172 INFO L132 encePairwiseOnDemand]: 190/193 looper letters, 12 selfloop transitions, 2 changer transitions 0/150 dead transitions. [2022-07-21 08:50:57,172 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 150 transitions, 349 flow [2022-07-21 08:50:57,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:50:57,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:50:57,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2022-07-21 08:50:57,174 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8341968911917098 [2022-07-21 08:50:57,174 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 483 transitions. [2022-07-21 08:50:57,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 483 transitions. [2022-07-21 08:50:57,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:57,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 483 transitions. [2022-07-21 08:50:57,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:57,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:57,176 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:57,176 INFO L186 Difference]: Start difference. First operand has 174 places, 146 transitions, 313 flow. Second operand 3 states and 483 transitions. [2022-07-21 08:50:57,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 150 transitions, 349 flow [2022-07-21 08:50:57,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 150 transitions, 343 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:57,185 INFO L242 Difference]: Finished difference. Result has 157 places, 147 transitions, 319 flow [2022-07-21 08:50:57,185 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=157, PETRI_TRANSITIONS=147} [2022-07-21 08:50:57,186 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, -17 predicate places. [2022-07-21 08:50:57,186 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 147 transitions, 319 flow [2022-07-21 08:50:57,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:57,187 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:57,187 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:57,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 08:50:57,187 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:57,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:57,187 INFO L85 PathProgramCache]: Analyzing trace with hash 6057065, now seen corresponding path program 1 times [2022-07-21 08:50:57,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:57,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601107326] [2022-07-21 08:50:57,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:57,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:57,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:57,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601107326] [2022-07-21 08:50:57,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601107326] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:50:57,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765253664] [2022-07-21 08:50:57,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:57,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:50:57,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:50:57,239 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) [2022-07-21 08:50:57,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 08:50:57,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:57,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:50:57,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:50:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:57,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:50:57,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:57,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765253664] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:50:57,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:50:57,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:50:57,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088464833] [2022-07-21 08:50:57,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:50:57,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:50:57,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:57,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:50:57,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:50:57,364 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 193 [2022-07-21 08:50:57,365 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 147 transitions, 319 flow. Second operand has 10 states, 10 states have (on average 157.3) internal successors, (1573), 10 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:57,365 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:57,366 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 193 [2022-07-21 08:50:57,366 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:57,436 INFO L129 PetriNetUnfolder]: 0/168 cut-off events. [2022-07-21 08:50:57,436 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-21 08:50:57,436 INFO L84 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 168 events. 0/168 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 255 event pairs, 0 based on Foata normal form. 2/170 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-21 08:50:57,437 INFO L132 encePairwiseOnDemand]: 187/193 looper letters, 13 selfloop transitions, 9 changer transitions 0/157 dead transitions. [2022-07-21 08:50:57,437 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 157 transitions, 385 flow [2022-07-21 08:50:57,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:50:57,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:50:57,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1419 transitions. [2022-07-21 08:50:57,440 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8169257340241797 [2022-07-21 08:50:57,440 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1419 transitions. [2022-07-21 08:50:57,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1419 transitions. [2022-07-21 08:50:57,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:57,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1419 transitions. [2022-07-21 08:50:57,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 157.66666666666666) internal successors, (1419), 9 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:57,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 193.0) internal successors, (1930), 10 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:57,446 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 193.0) internal successors, (1930), 10 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:57,446 INFO L186 Difference]: Start difference. First operand has 157 places, 147 transitions, 319 flow. Second operand 9 states and 1419 transitions. [2022-07-21 08:50:57,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 157 transitions, 385 flow [2022-07-21 08:50:57,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 157 transitions, 383 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:50:57,451 INFO L242 Difference]: Finished difference. Result has 167 places, 153 transitions, 367 flow [2022-07-21 08:50:57,451 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=367, PETRI_PLACES=167, PETRI_TRANSITIONS=153} [2022-07-21 08:50:57,452 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, -7 predicate places. [2022-07-21 08:50:57,452 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 153 transitions, 367 flow [2022-07-21 08:50:57,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 157.3) internal successors, (1573), 10 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:57,453 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:57,453 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:57,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-21 08:50:57,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 08:50:57,656 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:57,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:57,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1094259264, now seen corresponding path program 1 times [2022-07-21 08:50:57,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:57,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077997585] [2022-07-21 08:50:57,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:57,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:57,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:57,669 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:50:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:57,709 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:50:57,709 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:50:57,709 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:50:57,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:50:57,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 08:50:57,710 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-21 08:50:57,711 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:50:57,711 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-21 08:50:57,729 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-21 08:50:57,730 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 204 places, 228 transitions, 500 flow [2022-07-21 08:50:57,798 INFO L129 PetriNetUnfolder]: 81/589 cut-off events. [2022-07-21 08:50:57,798 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-21 08:50:57,803 INFO L84 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 589 events. 81/589 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2294 event pairs, 6 based on Foata normal form. 0/503 useless extension candidates. Maximal degree in co-relation 410. Up to 32 conditions per place. [2022-07-21 08:50:57,803 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 228 transitions, 500 flow [2022-07-21 08:50:57,807 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 228 transitions, 500 flow [2022-07-21 08:50:57,809 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:50:57,809 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@9941552, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@186df81b [2022-07-21 08:50:57,809 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:50:57,813 INFO L129 PetriNetUnfolder]: 6/95 cut-off events. [2022-07-21 08:50:57,813 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:50:57,813 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:57,813 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:57,814 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:57,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:57,814 INFO L85 PathProgramCache]: Analyzing trace with hash -267539753, now seen corresponding path program 1 times [2022-07-21 08:50:57,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:57,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541391181] [2022-07-21 08:50:57,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:57,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:57,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:57,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:57,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541391181] [2022-07-21 08:50:57,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541391181] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:57,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:57,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:50:57,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122182324] [2022-07-21 08:50:57,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:57,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:50:57,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:57,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:50:57,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:50:57,844 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 228 [2022-07-21 08:50:57,845 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 228 transitions, 500 flow. Second operand has 2 states, 2 states have (on average 190.5) internal successors, (381), 2 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:57,845 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:57,845 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 228 [2022-07-21 08:50:57,845 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:57,944 INFO L129 PetriNetUnfolder]: 21/524 cut-off events. [2022-07-21 08:50:57,944 INFO L130 PetriNetUnfolder]: For 126/140 co-relation queries the response was YES. [2022-07-21 08:50:57,946 INFO L84 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 524 events. 21/524 cut-off events. For 126/140 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2086 event pairs, 6 based on Foata normal form. 248/746 useless extension candidates. Maximal degree in co-relation 379. Up to 37 conditions per place. [2022-07-21 08:50:57,947 INFO L132 encePairwiseOnDemand]: 199/228 looper letters, 4 selfloop transitions, 0 changer transitions 24/198 dead transitions. [2022-07-21 08:50:57,947 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 198 transitions, 456 flow [2022-07-21 08:50:57,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:50:57,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:50:57,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 417 transitions. [2022-07-21 08:50:57,949 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9144736842105263 [2022-07-21 08:50:57,949 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 417 transitions. [2022-07-21 08:50:57,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 417 transitions. [2022-07-21 08:50:57,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:57,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 417 transitions. [2022-07-21 08:50:57,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 208.5) internal successors, (417), 2 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:57,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:57,951 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:57,951 INFO L186 Difference]: Start difference. First operand has 204 places, 228 transitions, 500 flow. Second operand 2 states and 417 transitions. [2022-07-21 08:50:57,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 198 transitions, 456 flow [2022-07-21 08:50:57,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 198 transitions, 456 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:57,955 INFO L242 Difference]: Finished difference. Result has 204 places, 174 transitions, 380 flow [2022-07-21 08:50:57,955 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=380, PETRI_PLACES=204, PETRI_TRANSITIONS=174} [2022-07-21 08:50:57,956 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, 0 predicate places. [2022-07-21 08:50:57,956 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 174 transitions, 380 flow [2022-07-21 08:50:57,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 190.5) internal successors, (381), 2 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:57,956 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:57,956 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:57,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 08:50:57,957 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:57,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:57,957 INFO L85 PathProgramCache]: Analyzing trace with hash -138457034, now seen corresponding path program 1 times [2022-07-21 08:50:57,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:57,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584710735] [2022-07-21 08:50:57,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:57,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:57,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:57,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:57,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584710735] [2022-07-21 08:50:57,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584710735] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:57,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:57,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:50:57,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286394480] [2022-07-21 08:50:57,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:57,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:50:57,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:57,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:50:57,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:50:57,996 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 228 [2022-07-21 08:50:57,996 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 174 transitions, 380 flow. Second operand has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:57,996 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:57,996 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 228 [2022-07-21 08:50:57,996 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:58,041 INFO L129 PetriNetUnfolder]: 0/241 cut-off events. [2022-07-21 08:50:58,042 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-21 08:50:58,042 INFO L84 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 241 events. 0/241 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 584 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-07-21 08:50:58,043 INFO L132 encePairwiseOnDemand]: 225/228 looper letters, 13 selfloop transitions, 2 changer transitions 0/178 dead transitions. [2022-07-21 08:50:58,043 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 178 transitions, 418 flow [2022-07-21 08:50:58,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:50:58,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:50:58,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 565 transitions. [2022-07-21 08:50:58,045 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8260233918128655 [2022-07-21 08:50:58,045 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 565 transitions. [2022-07-21 08:50:58,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 565 transitions. [2022-07-21 08:50:58,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:58,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 565 transitions. [2022-07-21 08:50:58,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:58,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:58,050 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:58,050 INFO L186 Difference]: Start difference. First operand has 204 places, 174 transitions, 380 flow. Second operand 3 states and 565 transitions. [2022-07-21 08:50:58,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 178 transitions, 418 flow [2022-07-21 08:50:58,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 178 transitions, 406 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:58,055 INFO L242 Difference]: Finished difference. Result has 187 places, 175 transitions, 380 flow [2022-07-21 08:50:58,056 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=380, PETRI_PLACES=187, PETRI_TRANSITIONS=175} [2022-07-21 08:50:58,057 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, -17 predicate places. [2022-07-21 08:50:58,057 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 175 transitions, 380 flow [2022-07-21 08:50:58,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:58,057 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:58,057 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:58,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 08:50:58,058 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:58,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:58,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1594287592, now seen corresponding path program 1 times [2022-07-21 08:50:58,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:58,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250877607] [2022-07-21 08:50:58,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:58,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:58,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:58,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:58,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250877607] [2022-07-21 08:50:58,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250877607] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:50:58,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107164360] [2022-07-21 08:50:58,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:58,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:50:58,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:50:58,109 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) [2022-07-21 08:50:58,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 08:50:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:58,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:50:58,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:50:58,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:58,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:50:58,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:58,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107164360] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:50:58,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:50:58,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:50:58,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085637445] [2022-07-21 08:50:58,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:50:58,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:50:58,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:58,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:50:58,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:50:58,244 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 228 [2022-07-21 08:50:58,245 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 175 transitions, 380 flow. Second operand has 10 states, 10 states have (on average 184.3) internal successors, (1843), 10 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:58,246 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:58,246 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 228 [2022-07-21 08:50:58,246 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:58,332 INFO L129 PetriNetUnfolder]: 0/217 cut-off events. [2022-07-21 08:50:58,332 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-21 08:50:58,332 INFO L84 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 217 events. 0/217 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 440 event pairs, 0 based on Foata normal form. 2/219 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-21 08:50:58,333 INFO L132 encePairwiseOnDemand]: 222/228 looper letters, 14 selfloop transitions, 9 changer transitions 0/185 dead transitions. [2022-07-21 08:50:58,333 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 185 transitions, 448 flow [2022-07-21 08:50:58,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:50:58,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:50:58,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1663 transitions. [2022-07-21 08:50:58,336 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8104288499025342 [2022-07-21 08:50:58,336 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1663 transitions. [2022-07-21 08:50:58,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1663 transitions. [2022-07-21 08:50:58,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:58,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1663 transitions. [2022-07-21 08:50:58,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 184.77777777777777) internal successors, (1663), 9 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:58,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 228.0) internal successors, (2280), 10 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:58,343 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 228.0) internal successors, (2280), 10 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:58,343 INFO L186 Difference]: Start difference. First operand has 187 places, 175 transitions, 380 flow. Second operand 9 states and 1663 transitions. [2022-07-21 08:50:58,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 185 transitions, 448 flow [2022-07-21 08:50:58,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 185 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:50:58,350 INFO L242 Difference]: Finished difference. Result has 197 places, 181 transitions, 428 flow [2022-07-21 08:50:58,350 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=428, PETRI_PLACES=197, PETRI_TRANSITIONS=181} [2022-07-21 08:50:58,350 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, -7 predicate places. [2022-07-21 08:50:58,350 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 181 transitions, 428 flow [2022-07-21 08:50:58,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 184.3) internal successors, (1843), 10 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:58,352 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:58,352 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:58,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 08:50:58,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:50:58,568 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:58,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:58,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2107054441, now seen corresponding path program 1 times [2022-07-21 08:50:58,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:58,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117677121] [2022-07-21 08:50:58,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:58,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:58,641 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:58,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:58,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117677121] [2022-07-21 08:50:58,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117677121] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:50:58,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880144302] [2022-07-21 08:50:58,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:58,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:50:58,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:50:58,643 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) [2022-07-21 08:50:58,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 08:50:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:58,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:50:58,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:50:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:58,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:50:58,870 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:58,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880144302] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:50:58,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:50:58,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:50:58,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791672221] [2022-07-21 08:50:58,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:50:58,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:50:58,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:58,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:50:58,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:50:58,875 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 228 [2022-07-21 08:50:58,877 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 181 transitions, 428 flow. Second operand has 18 states, 18 states have (on average 184.61111111111111) internal successors, (3323), 18 states have internal predecessors, (3323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:58,877 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:58,877 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 228 [2022-07-21 08:50:58,877 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:58,971 INFO L129 PetriNetUnfolder]: 0/193 cut-off events. [2022-07-21 08:50:58,972 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-07-21 08:50:58,972 INFO L84 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 193 events. 0/193 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 301 event pairs, 0 based on Foata normal form. 2/195 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-21 08:50:58,972 INFO L132 encePairwiseOnDemand]: 223/228 looper letters, 15 selfloop transitions, 13 changer transitions 0/179 dead transitions. [2022-07-21 08:50:58,972 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 179 transitions, 492 flow [2022-07-21 08:50:58,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 08:50:58,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-21 08:50:58,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2760 transitions. [2022-07-21 08:50:58,976 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8070175438596491 [2022-07-21 08:50:58,977 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2760 transitions. [2022-07-21 08:50:58,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2760 transitions. [2022-07-21 08:50:58,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:58,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2760 transitions. [2022-07-21 08:50:58,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 184.0) internal successors, (2760), 15 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:58,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 228.0) internal successors, (3648), 16 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:58,986 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 228.0) internal successors, (3648), 16 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:58,992 INFO L186 Difference]: Start difference. First operand has 197 places, 181 transitions, 428 flow. Second operand 15 states and 2760 transitions. [2022-07-21 08:50:58,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 179 transitions, 492 flow [2022-07-21 08:50:58,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 179 transitions, 475 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-07-21 08:50:58,995 INFO L242 Difference]: Finished difference. Result has 195 places, 172 transitions, 424 flow [2022-07-21 08:50:58,996 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=424, PETRI_PLACES=195, PETRI_TRANSITIONS=172} [2022-07-21 08:50:58,996 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, -9 predicate places. [2022-07-21 08:50:58,996 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 172 transitions, 424 flow [2022-07-21 08:50:58,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 184.61111111111111) internal successors, (3323), 18 states have internal predecessors, (3323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:58,997 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:58,997 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:59,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 08:50:59,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-21 08:50:59,215 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:59,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:59,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1678445639, now seen corresponding path program 1 times [2022-07-21 08:50:59,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:59,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904464214] [2022-07-21 08:50:59,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:59,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:59,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:59,228 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:50:59,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:59,242 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:50:59,242 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:50:59,242 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:50:59,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:50:59,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 08:50:59,243 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-21 08:50:59,243 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:50:59,243 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-21 08:50:59,266 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-21 08:50:59,268 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 234 places, 263 transitions, 586 flow [2022-07-21 08:50:59,369 INFO L129 PetriNetUnfolder]: 140/928 cut-off events. [2022-07-21 08:50:59,369 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-21 08:50:59,379 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1039 conditions, 928 events. 140/928 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4372 event pairs, 23 based on Foata normal form. 0/798 useless extension candidates. Maximal degree in co-relation 634. Up to 80 conditions per place. [2022-07-21 08:50:59,380 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 263 transitions, 586 flow [2022-07-21 08:50:59,388 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 234 places, 263 transitions, 586 flow [2022-07-21 08:50:59,388 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:50:59,389 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@9941552, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@186df81b [2022-07-21 08:50:59,389 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:50:59,392 INFO L129 PetriNetUnfolder]: 6/97 cut-off events. [2022-07-21 08:50:59,392 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:50:59,392 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:59,393 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:59,394 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:59,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:59,394 INFO L85 PathProgramCache]: Analyzing trace with hash -540841577, now seen corresponding path program 1 times [2022-07-21 08:50:59,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:59,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190630976] [2022-07-21 08:50:59,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:59,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:59,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:59,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:59,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190630976] [2022-07-21 08:50:59,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190630976] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:59,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:59,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:50:59,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092687149] [2022-07-21 08:50:59,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:59,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:50:59,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:59,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:50:59,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:50:59,407 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 263 [2022-07-21 08:50:59,408 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 263 transitions, 586 flow. Second operand has 2 states, 2 states have (on average 217.5) internal successors, (435), 2 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:59,409 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:59,409 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 263 [2022-07-21 08:50:59,409 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:59,511 INFO L129 PetriNetUnfolder]: 54/836 cut-off events. [2022-07-21 08:50:59,512 INFO L130 PetriNetUnfolder]: For 293/319 co-relation queries the response was YES. [2022-07-21 08:50:59,518 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1033 conditions, 836 events. 54/836 cut-off events. For 293/319 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3952 event pairs, 23 based on Foata normal form. 574/1366 useless extension candidates. Maximal degree in co-relation 605. Up to 86 conditions per place. [2022-07-21 08:50:59,519 INFO L132 encePairwiseOnDemand]: 228/263 looper letters, 5 selfloop transitions, 0 changer transitions 25/227 dead transitions. [2022-07-21 08:50:59,519 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 227 transitions, 534 flow [2022-07-21 08:50:59,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:50:59,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:50:59,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 479 transitions. [2022-07-21 08:50:59,520 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9106463878326996 [2022-07-21 08:50:59,521 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 479 transitions. [2022-07-21 08:50:59,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 479 transitions. [2022-07-21 08:50:59,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:59,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 479 transitions. [2022-07-21 08:50:59,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 239.5) internal successors, (479), 2 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:59,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 263.0) internal successors, (789), 3 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:59,523 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 263.0) internal successors, (789), 3 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:59,523 INFO L186 Difference]: Start difference. First operand has 234 places, 263 transitions, 586 flow. Second operand 2 states and 479 transitions. [2022-07-21 08:50:59,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 227 transitions, 534 flow [2022-07-21 08:50:59,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 227 transitions, 534 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:59,528 INFO L242 Difference]: Finished difference. Result has 234 places, 202 transitions, 449 flow [2022-07-21 08:50:59,528 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=449, PETRI_PLACES=234, PETRI_TRANSITIONS=202} [2022-07-21 08:50:59,529 INFO L279 CegarLoopForPetriNet]: 234 programPoint places, 0 predicate places. [2022-07-21 08:50:59,529 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 202 transitions, 449 flow [2022-07-21 08:50:59,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 217.5) internal successors, (435), 2 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:59,530 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:59,530 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:59,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 08:50:59,530 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:59,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:59,531 INFO L85 PathProgramCache]: Analyzing trace with hash -411758858, now seen corresponding path program 1 times [2022-07-21 08:50:59,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:59,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128952520] [2022-07-21 08:50:59,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:59,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:59,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:59,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128952520] [2022-07-21 08:50:59,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128952520] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:59,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:59,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:50:59,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854617278] [2022-07-21 08:50:59,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:59,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:50:59,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:59,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:50:59,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:50:59,563 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 263 [2022-07-21 08:50:59,564 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 202 transitions, 449 flow. Second operand has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:59,564 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:59,564 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 263 [2022-07-21 08:50:59,564 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:59,613 INFO L129 PetriNetUnfolder]: 0/290 cut-off events. [2022-07-21 08:50:59,614 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-21 08:50:59,614 INFO L84 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 290 events. 0/290 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 770 event pairs, 0 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-07-21 08:50:59,614 INFO L132 encePairwiseOnDemand]: 260/263 looper letters, 14 selfloop transitions, 2 changer transitions 0/206 dead transitions. [2022-07-21 08:50:59,614 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 206 transitions, 489 flow [2022-07-21 08:50:59,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:50:59,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:50:59,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 647 transitions. [2022-07-21 08:50:59,616 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8200253485424588 [2022-07-21 08:50:59,616 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 647 transitions. [2022-07-21 08:50:59,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 647 transitions. [2022-07-21 08:50:59,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:59,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 647 transitions. [2022-07-21 08:50:59,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:59,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:59,628 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:59,628 INFO L186 Difference]: Start difference. First operand has 234 places, 202 transitions, 449 flow. Second operand 3 states and 647 transitions. [2022-07-21 08:50:59,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 206 transitions, 489 flow [2022-07-21 08:50:59,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 206 transitions, 469 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:59,631 INFO L242 Difference]: Finished difference. Result has 217 places, 203 transitions, 441 flow [2022-07-21 08:50:59,631 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=441, PETRI_PLACES=217, PETRI_TRANSITIONS=203} [2022-07-21 08:50:59,632 INFO L279 CegarLoopForPetriNet]: 234 programPoint places, -17 predicate places. [2022-07-21 08:50:59,632 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 203 transitions, 441 flow [2022-07-21 08:50:59,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:59,632 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:59,632 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:59,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-21 08:50:59,632 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:59,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:59,633 INFO L85 PathProgramCache]: Analyzing trace with hash -640102649, now seen corresponding path program 1 times [2022-07-21 08:50:59,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:59,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528132109] [2022-07-21 08:50:59,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:59,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:59,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:59,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528132109] [2022-07-21 08:50:59,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528132109] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:50:59,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360416692] [2022-07-21 08:50:59,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:59,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:50:59,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:50:59,664 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) [2022-07-21 08:50:59,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 08:50:59,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:59,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:50:59,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:50:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:59,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:50:59,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:59,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360416692] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:50:59,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:50:59,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:50:59,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813007160] [2022-07-21 08:50:59,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:50:59,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:50:59,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:59,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:50:59,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:50:59,795 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 263 [2022-07-21 08:50:59,796 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 203 transitions, 441 flow. Second operand has 10 states, 10 states have (on average 211.3) internal successors, (2113), 10 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:59,796 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:59,796 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 263 [2022-07-21 08:50:59,796 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:59,892 INFO L129 PetriNetUnfolder]: 0/266 cut-off events. [2022-07-21 08:50:59,892 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-21 08:50:59,893 INFO L84 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 266 events. 0/266 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 624 event pairs, 0 based on Foata normal form. 2/268 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-21 08:50:59,893 INFO L132 encePairwiseOnDemand]: 257/263 looper letters, 15 selfloop transitions, 9 changer transitions 0/213 dead transitions. [2022-07-21 08:50:59,893 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 213 transitions, 511 flow [2022-07-21 08:50:59,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:50:59,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:50:59,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1907 transitions. [2022-07-21 08:50:59,896 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8056611744824672 [2022-07-21 08:50:59,896 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1907 transitions. [2022-07-21 08:50:59,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1907 transitions. [2022-07-21 08:50:59,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:59,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1907 transitions. [2022-07-21 08:50:59,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 211.88888888888889) internal successors, (1907), 9 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:59,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 263.0) internal successors, (2630), 10 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:59,902 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 263.0) internal successors, (2630), 10 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:59,902 INFO L186 Difference]: Start difference. First operand has 217 places, 203 transitions, 441 flow. Second operand 9 states and 1907 transitions. [2022-07-21 08:50:59,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 213 transitions, 511 flow [2022-07-21 08:50:59,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 213 transitions, 509 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:50:59,905 INFO L242 Difference]: Finished difference. Result has 227 places, 209 transitions, 489 flow [2022-07-21 08:50:59,906 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=489, PETRI_PLACES=227, PETRI_TRANSITIONS=209} [2022-07-21 08:50:59,906 INFO L279 CegarLoopForPetriNet]: 234 programPoint places, -7 predicate places. [2022-07-21 08:50:59,906 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 209 transitions, 489 flow [2022-07-21 08:50:59,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 211.3) internal successors, (2113), 10 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:59,906 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:59,907 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:59,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:00,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:00,120 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:00,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:00,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1059240186, now seen corresponding path program 1 times [2022-07-21 08:51:00,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:00,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157760116] [2022-07-21 08:51:00,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:00,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:00,166 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:00,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:00,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157760116] [2022-07-21 08:51:00,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157760116] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:00,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962138432] [2022-07-21 08:51:00,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:00,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:00,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:00,168 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) [2022-07-21 08:51:00,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 08:51:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:00,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:51:00,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:00,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:00,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962138432] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:00,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:00,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:51:00,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488965468] [2022-07-21 08:51:00,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:00,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:51:00,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:00,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:51:00,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:51:00,377 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 263 [2022-07-21 08:51:00,379 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 209 transitions, 489 flow. Second operand has 18 states, 18 states have (on average 211.61111111111111) internal successors, (3809), 18 states have internal predecessors, (3809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,379 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:00,379 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 263 [2022-07-21 08:51:00,379 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:00,516 INFO L129 PetriNetUnfolder]: 0/230 cut-off events. [2022-07-21 08:51:00,516 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-07-21 08:51:00,517 INFO L84 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 230 events. 0/230 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 405 event pairs, 0 based on Foata normal form. 3/233 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-21 08:51:00,517 INFO L132 encePairwiseOnDemand]: 258/263 looper letters, 18 selfloop transitions, 16 changer transitions 0/212 dead transitions. [2022-07-21 08:51:00,517 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 212 transitions, 589 flow [2022-07-21 08:51:00,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 08:51:00,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-21 08:51:00,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3799 transitions. [2022-07-21 08:51:00,524 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8024926066751161 [2022-07-21 08:51:00,524 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3799 transitions. [2022-07-21 08:51:00,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3799 transitions. [2022-07-21 08:51:00,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:00,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3799 transitions. [2022-07-21 08:51:00,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 211.05555555555554) internal successors, (3799), 18 states have internal predecessors, (3799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 263.0) internal successors, (4997), 19 states have internal predecessors, (4997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,537 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 263.0) internal successors, (4997), 19 states have internal predecessors, (4997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,537 INFO L186 Difference]: Start difference. First operand has 227 places, 209 transitions, 489 flow. Second operand 18 states and 3799 transitions. [2022-07-21 08:51:00,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 212 transitions, 589 flow [2022-07-21 08:51:00,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 212 transitions, 568 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-07-21 08:51:00,541 INFO L242 Difference]: Finished difference. Result has 228 places, 203 transitions, 504 flow [2022-07-21 08:51:00,541 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=504, PETRI_PLACES=228, PETRI_TRANSITIONS=203} [2022-07-21 08:51:00,541 INFO L279 CegarLoopForPetriNet]: 234 programPoint places, -6 predicate places. [2022-07-21 08:51:00,542 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 203 transitions, 504 flow [2022-07-21 08:51:00,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 211.61111111111111) internal successors, (3809), 18 states have internal predecessors, (3809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,543 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:00,543 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:00,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:00,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:00,764 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:00,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:00,764 INFO L85 PathProgramCache]: Analyzing trace with hash -597627464, now seen corresponding path program 1 times [2022-07-21 08:51:00,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:00,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208613192] [2022-07-21 08:51:00,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:00,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:00,780 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:00,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:00,801 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:00,802 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:00,802 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:00,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:00,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-21 08:51:00,803 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-21 08:51:00,803 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:00,803 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-21 08:51:00,821 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-21 08:51:00,823 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 264 places, 298 transitions, 674 flow [2022-07-21 08:51:01,019 INFO L129 PetriNetUnfolder]: 263/1555 cut-off events. [2022-07-21 08:51:01,019 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-07-21 08:51:01,042 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1787 conditions, 1555 events. 263/1555 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8892 event pairs, 72 based on Foata normal form. 0/1349 useless extension candidates. Maximal degree in co-relation 1027. Up to 192 conditions per place. [2022-07-21 08:51:01,042 INFO L82 GeneralOperation]: Start removeDead. Operand has 264 places, 298 transitions, 674 flow [2022-07-21 08:51:01,054 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 264 places, 298 transitions, 674 flow [2022-07-21 08:51:01,055 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:01,055 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@9941552, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@186df81b [2022-07-21 08:51:01,055 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:01,063 INFO L129 PetriNetUnfolder]: 3/87 cut-off events. [2022-07-21 08:51:01,063 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:01,063 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:01,063 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:01,063 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:01,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:01,063 INFO L85 PathProgramCache]: Analyzing trace with hash -197287401, now seen corresponding path program 1 times [2022-07-21 08:51:01,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:01,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968875147] [2022-07-21 08:51:01,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:01,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:01,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:01,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:01,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968875147] [2022-07-21 08:51:01,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968875147] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:01,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:01,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:51:01,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969082458] [2022-07-21 08:51:01,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:01,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:51:01,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:01,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:51:01,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:51:01,075 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 298 [2022-07-21 08:51:01,075 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 298 transitions, 674 flow. Second operand has 2 states, 2 states have (on average 244.5) internal successors, (489), 2 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:01,075 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:01,075 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 298 [2022-07-21 08:51:01,075 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:01,274 INFO L129 PetriNetUnfolder]: 135/1420 cut-off events. [2022-07-21 08:51:01,274 INFO L130 PetriNetUnfolder]: For 651/675 co-relation queries the response was YES. [2022-07-21 08:51:01,284 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1851 conditions, 1420 events. 135/1420 cut-off events. For 651/675 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8351 event pairs, 72 based on Foata normal form. 1306/2648 useless extension candidates. Maximal degree in co-relation 1020. Up to 199 conditions per place. [2022-07-21 08:51:01,285 INFO L132 encePairwiseOnDemand]: 257/298 looper letters, 6 selfloop transitions, 0 changer transitions 26/256 dead transitions. [2022-07-21 08:51:01,285 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 256 transitions, 614 flow [2022-07-21 08:51:01,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:51:01,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:51:01,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 541 transitions. [2022-07-21 08:51:01,286 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9077181208053692 [2022-07-21 08:51:01,286 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 541 transitions. [2022-07-21 08:51:01,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 541 transitions. [2022-07-21 08:51:01,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:01,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 541 transitions. [2022-07-21 08:51:01,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 270.5) internal successors, (541), 2 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:01,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 298.0) internal successors, (894), 3 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:01,288 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 298.0) internal successors, (894), 3 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:01,288 INFO L186 Difference]: Start difference. First operand has 264 places, 298 transitions, 674 flow. Second operand 2 states and 541 transitions. [2022-07-21 08:51:01,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 256 transitions, 614 flow [2022-07-21 08:51:01,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 256 transitions, 614 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:01,292 INFO L242 Difference]: Finished difference. Result has 264 places, 230 transitions, 520 flow [2022-07-21 08:51:01,292 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=520, PETRI_PLACES=264, PETRI_TRANSITIONS=230} [2022-07-21 08:51:01,292 INFO L279 CegarLoopForPetriNet]: 264 programPoint places, 0 predicate places. [2022-07-21 08:51:01,292 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 230 transitions, 520 flow [2022-07-21 08:51:01,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 244.5) internal successors, (489), 2 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:01,293 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:01,293 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:01,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-21 08:51:01,293 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:01,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:01,293 INFO L85 PathProgramCache]: Analyzing trace with hash -68204682, now seen corresponding path program 1 times [2022-07-21 08:51:01,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:01,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038377842] [2022-07-21 08:51:01,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:01,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:01,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:01,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:01,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038377842] [2022-07-21 08:51:01,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038377842] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:01,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:01,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:01,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955338929] [2022-07-21 08:51:01,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:01,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:01,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:01,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:01,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:01,308 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 298 [2022-07-21 08:51:01,309 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 230 transitions, 520 flow. Second operand has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:01,309 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:01,309 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 298 [2022-07-21 08:51:01,309 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:01,365 INFO L129 PetriNetUnfolder]: 0/339 cut-off events. [2022-07-21 08:51:01,366 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-21 08:51:01,366 INFO L84 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 339 events. 0/339 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 954 event pairs, 0 based on Foata normal form. 0/333 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-07-21 08:51:01,367 INFO L132 encePairwiseOnDemand]: 295/298 looper letters, 15 selfloop transitions, 2 changer transitions 0/234 dead transitions. [2022-07-21 08:51:01,367 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 234 transitions, 562 flow [2022-07-21 08:51:01,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:01,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:01,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 729 transitions. [2022-07-21 08:51:01,368 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8154362416107382 [2022-07-21 08:51:01,368 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 729 transitions. [2022-07-21 08:51:01,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 729 transitions. [2022-07-21 08:51:01,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:01,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 729 transitions. [2022-07-21 08:51:01,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:01,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:01,371 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:01,371 INFO L186 Difference]: Start difference. First operand has 264 places, 230 transitions, 520 flow. Second operand 3 states and 729 transitions. [2022-07-21 08:51:01,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 234 transitions, 562 flow [2022-07-21 08:51:01,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 234 transitions, 532 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:01,375 INFO L242 Difference]: Finished difference. Result has 247 places, 231 transitions, 502 flow [2022-07-21 08:51:01,375 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=502, PETRI_PLACES=247, PETRI_TRANSITIONS=231} [2022-07-21 08:51:01,375 INFO L279 CegarLoopForPetriNet]: 264 programPoint places, -17 predicate places. [2022-07-21 08:51:01,375 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 231 transitions, 502 flow [2022-07-21 08:51:01,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:01,376 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:01,376 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:01,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-21 08:51:01,376 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:01,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:01,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1892820934, now seen corresponding path program 1 times [2022-07-21 08:51:01,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:01,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129294862] [2022-07-21 08:51:01,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:01,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:01,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:01,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:01,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:01,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129294862] [2022-07-21 08:51:01,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129294862] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:01,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474705299] [2022-07-21 08:51:01,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:01,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:01,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:01,401 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) [2022-07-21 08:51:01,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 08:51:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:01,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:01,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:01,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:01,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:01,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474705299] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:01,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:01,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:01,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10973513] [2022-07-21 08:51:01,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:01,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:01,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:01,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:01,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:01,521 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 298 [2022-07-21 08:51:01,523 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 231 transitions, 502 flow. Second operand has 10 states, 10 states have (on average 238.3) internal successors, (2383), 10 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:01,523 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:01,523 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 298 [2022-07-21 08:51:01,523 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:01,616 INFO L129 PetriNetUnfolder]: 0/315 cut-off events. [2022-07-21 08:51:01,616 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-21 08:51:01,616 INFO L84 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 315 events. 0/315 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 811 event pairs, 0 based on Foata normal form. 2/317 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-21 08:51:01,617 INFO L132 encePairwiseOnDemand]: 292/298 looper letters, 16 selfloop transitions, 9 changer transitions 0/241 dead transitions. [2022-07-21 08:51:01,617 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 241 transitions, 574 flow [2022-07-21 08:51:01,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:01,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:01,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2151 transitions. [2022-07-21 08:51:01,622 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.802013422818792 [2022-07-21 08:51:01,622 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2151 transitions. [2022-07-21 08:51:01,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2151 transitions. [2022-07-21 08:51:01,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:01,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2151 transitions. [2022-07-21 08:51:01,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 239.0) internal successors, (2151), 9 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:01,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 298.0) internal successors, (2980), 10 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:01,630 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 298.0) internal successors, (2980), 10 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:01,630 INFO L186 Difference]: Start difference. First operand has 247 places, 231 transitions, 502 flow. Second operand 9 states and 2151 transitions. [2022-07-21 08:51:01,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 241 transitions, 574 flow [2022-07-21 08:51:01,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 241 transitions, 572 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:01,634 INFO L242 Difference]: Finished difference. Result has 257 places, 237 transitions, 550 flow [2022-07-21 08:51:01,634 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=550, PETRI_PLACES=257, PETRI_TRANSITIONS=237} [2022-07-21 08:51:01,635 INFO L279 CegarLoopForPetriNet]: 264 programPoint places, -7 predicate places. [2022-07-21 08:51:01,635 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 237 transitions, 550 flow [2022-07-21 08:51:01,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 238.3) internal successors, (2383), 10 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:01,636 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:01,636 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:01,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:01,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:01,852 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:01,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:01,852 INFO L85 PathProgramCache]: Analyzing trace with hash -947304445, now seen corresponding path program 1 times [2022-07-21 08:51:01,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:01,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266627276] [2022-07-21 08:51:01,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:01,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:01,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:01,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266627276] [2022-07-21 08:51:01,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266627276] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:01,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433689802] [2022-07-21 08:51:01,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:01,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:01,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:01,901 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) [2022-07-21 08:51:01,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 08:51:01,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:01,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:51:01,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:02,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:02,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433689802] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:02,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:02,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:51:02,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365708291] [2022-07-21 08:51:02,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:02,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:51:02,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:02,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:51:02,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:51:02,118 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 298 [2022-07-21 08:51:02,120 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 237 transitions, 550 flow. Second operand has 18 states, 18 states have (on average 238.61111111111111) internal successors, (4295), 18 states have internal predecessors, (4295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:02,120 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:02,120 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 298 [2022-07-21 08:51:02,120 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:02,284 INFO L129 PetriNetUnfolder]: 0/267 cut-off events. [2022-07-21 08:51:02,284 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-21 08:51:02,284 INFO L84 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 267 events. 0/267 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 509 event pairs, 0 based on Foata normal form. 4/271 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-07-21 08:51:02,285 INFO L132 encePairwiseOnDemand]: 293/298 looper letters, 21 selfloop transitions, 19 changer transitions 0/245 dead transitions. [2022-07-21 08:51:02,285 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 245 transitions, 686 flow [2022-07-21 08:51:02,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:51:02,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:51:02,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5000 transitions. [2022-07-21 08:51:02,289 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7989773090444231 [2022-07-21 08:51:02,289 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5000 transitions. [2022-07-21 08:51:02,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5000 transitions. [2022-07-21 08:51:02,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:02,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5000 transitions. [2022-07-21 08:51:02,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 238.0952380952381) internal successors, (5000), 21 states have internal predecessors, (5000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:02,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 298.0) internal successors, (6556), 22 states have internal predecessors, (6556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:02,304 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 298.0) internal successors, (6556), 22 states have internal predecessors, (6556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:02,304 INFO L186 Difference]: Start difference. First operand has 257 places, 237 transitions, 550 flow. Second operand 21 states and 5000 transitions. [2022-07-21 08:51:02,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 245 transitions, 686 flow [2022-07-21 08:51:02,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 245 transitions, 661 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-07-21 08:51:02,308 INFO L242 Difference]: Finished difference. Result has 261 places, 234 transitions, 584 flow [2022-07-21 08:51:02,309 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=584, PETRI_PLACES=261, PETRI_TRANSITIONS=234} [2022-07-21 08:51:02,309 INFO L279 CegarLoopForPetriNet]: 264 programPoint places, -3 predicate places. [2022-07-21 08:51:02,309 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 234 transitions, 584 flow [2022-07-21 08:51:02,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 238.61111111111111) internal successors, (4295), 18 states have internal predecessors, (4295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:02,310 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:02,310 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:02,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:02,527 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,SelfDestructingSolverStorable24 [2022-07-21 08:51:02,527 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:02,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:02,528 INFO L85 PathProgramCache]: Analyzing trace with hash -480155363, now seen corresponding path program 1 times [2022-07-21 08:51:02,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:02,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689899405] [2022-07-21 08:51:02,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:02,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:02,551 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:02,568 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:02,568 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:02,568 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:02,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:02,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-21 08:51:02,568 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-21 08:51:02,569 WARN L231 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:02,569 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-07-21 08:51:02,585 INFO L135 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2022-07-21 08:51:02,587 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 294 places, 333 transitions, 764 flow [2022-07-21 08:51:03,003 INFO L129 PetriNetUnfolder]: 530/2774 cut-off events. [2022-07-21 08:51:03,004 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2022-07-21 08:51:03,037 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3272 conditions, 2774 events. 530/2774 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 18746 event pairs, 201 based on Foata normal form. 0/2428 useless extension candidates. Maximal degree in co-relation 1773. Up to 448 conditions per place. [2022-07-21 08:51:03,037 INFO L82 GeneralOperation]: Start removeDead. Operand has 294 places, 333 transitions, 764 flow [2022-07-21 08:51:03,058 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 294 places, 333 transitions, 764 flow [2022-07-21 08:51:03,059 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:03,059 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@9941552, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@186df81b [2022-07-21 08:51:03,059 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:03,062 INFO L129 PetriNetUnfolder]: 4/89 cut-off events. [2022-07-21 08:51:03,063 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:03,063 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:03,063 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:03,063 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:03,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:03,063 INFO L85 PathProgramCache]: Analyzing trace with hash 892205494, now seen corresponding path program 1 times [2022-07-21 08:51:03,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:03,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678350047] [2022-07-21 08:51:03,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:03,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:03,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:03,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:03,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678350047] [2022-07-21 08:51:03,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678350047] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:03,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:03,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:03,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142985937] [2022-07-21 08:51:03,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:03,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:03,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:03,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:03,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:03,080 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 333 [2022-07-21 08:51:03,081 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 333 transitions, 764 flow. Second operand has 3 states, 3 states have (on average 265.0) internal successors, (795), 3 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:03,081 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:03,081 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 333 [2022-07-21 08:51:03,081 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:03,590 INFO L129 PetriNetUnfolder]: 327/2545 cut-off events. [2022-07-21 08:51:03,591 INFO L130 PetriNetUnfolder]: For 1469/1674 co-relation queries the response was YES. [2022-07-21 08:51:03,614 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3538 conditions, 2545 events. 327/2545 cut-off events. For 1469/1674 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 18149 event pairs, 201 based on Foata normal form. 3525/5928 useless extension candidates. Maximal degree in co-relation 1851. Up to 490 conditions per place. [2022-07-21 08:51:03,616 INFO L132 encePairwiseOnDemand]: 283/333 looper letters, 16 selfloop transitions, 2 changer transitions 27/289 dead transitions. [2022-07-21 08:51:03,616 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 289 transitions, 726 flow [2022-07-21 08:51:03,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:03,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:03,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 872 transitions. [2022-07-21 08:51:03,617 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8728728728728729 [2022-07-21 08:51:03,617 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 872 transitions. [2022-07-21 08:51:03,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 872 transitions. [2022-07-21 08:51:03,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:03,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 872 transitions. [2022-07-21 08:51:03,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:03,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:03,619 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:03,619 INFO L186 Difference]: Start difference. First operand has 294 places, 333 transitions, 764 flow. Second operand 3 states and 872 transitions. [2022-07-21 08:51:03,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 289 transitions, 726 flow [2022-07-21 08:51:03,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 289 transitions, 726 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:03,624 INFO L242 Difference]: Finished difference. Result has 296 places, 259 transitions, 605 flow [2022-07-21 08:51:03,624 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=605, PETRI_PLACES=296, PETRI_TRANSITIONS=259} [2022-07-21 08:51:03,625 INFO L279 CegarLoopForPetriNet]: 294 programPoint places, 2 predicate places. [2022-07-21 08:51:03,625 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 259 transitions, 605 flow [2022-07-21 08:51:03,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 265.0) internal successors, (795), 3 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:03,625 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:03,625 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:03,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-21 08:51:03,625 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:03,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:03,626 INFO L85 PathProgramCache]: Analyzing trace with hash 603123749, now seen corresponding path program 1 times [2022-07-21 08:51:03,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:03,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067916500] [2022-07-21 08:51:03,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:03,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:03,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:03,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067916500] [2022-07-21 08:51:03,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067916500] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:03,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591247679] [2022-07-21 08:51:03,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:03,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:03,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:03,649 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) [2022-07-21 08:51:03,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 08:51:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:03,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:03,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:03,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:03,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591247679] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:03,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:03,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:03,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801620787] [2022-07-21 08:51:03,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:03,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:03,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:03,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:03,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:03,814 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 333 [2022-07-21 08:51:03,815 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 259 transitions, 605 flow. Second operand has 10 states, 10 states have (on average 265.3) internal successors, (2653), 10 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:03,815 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:03,815 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 333 [2022-07-21 08:51:03,815 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:03,906 INFO L129 PetriNetUnfolder]: 0/364 cut-off events. [2022-07-21 08:51:03,906 INFO L130 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2022-07-21 08:51:03,906 INFO L84 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 364 events. 0/364 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 994 event pairs, 0 based on Foata normal form. 2/366 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-07-21 08:51:03,907 INFO L132 encePairwiseOnDemand]: 327/333 looper letters, 17 selfloop transitions, 9 changer transitions 0/269 dead transitions. [2022-07-21 08:51:03,907 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 269 transitions, 679 flow [2022-07-21 08:51:03,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:03,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:03,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2395 transitions. [2022-07-21 08:51:03,911 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7991324657991324 [2022-07-21 08:51:03,911 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2395 transitions. [2022-07-21 08:51:03,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2395 transitions. [2022-07-21 08:51:03,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:03,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2395 transitions. [2022-07-21 08:51:03,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 266.1111111111111) internal successors, (2395), 9 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:03,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:03,917 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:03,917 INFO L186 Difference]: Start difference. First operand has 296 places, 259 transitions, 605 flow. Second operand 9 states and 2395 transitions. [2022-07-21 08:51:03,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 269 transitions, 679 flow [2022-07-21 08:51:03,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 269 transitions, 635 flow, removed 21 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:03,922 INFO L242 Difference]: Finished difference. Result has 286 places, 265 transitions, 611 flow [2022-07-21 08:51:03,922 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=611, PETRI_PLACES=286, PETRI_TRANSITIONS=265} [2022-07-21 08:51:03,923 INFO L279 CegarLoopForPetriNet]: 294 programPoint places, -8 predicate places. [2022-07-21 08:51:03,923 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 265 transitions, 611 flow [2022-07-21 08:51:03,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 265.3) internal successors, (2653), 10 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:03,924 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:03,924 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:03,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:04,148 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,SelfDestructingSolverStorable27 [2022-07-21 08:51:04,149 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:04,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:04,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1852105632, now seen corresponding path program 1 times [2022-07-21 08:51:04,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:04,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190622408] [2022-07-21 08:51:04,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:04,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:04,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:04,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190622408] [2022-07-21 08:51:04,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190622408] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:04,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061822065] [2022-07-21 08:51:04,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:04,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:04,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:04,204 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) [2022-07-21 08:51:04,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 08:51:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:04,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:51:04,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:04,339 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:04,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:04,443 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:04,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061822065] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:04,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:04,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:51:04,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152134786] [2022-07-21 08:51:04,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:04,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:51:04,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:04,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:51:04,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:51:04,448 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 333 [2022-07-21 08:51:04,451 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 265 transitions, 611 flow. Second operand has 18 states, 18 states have (on average 265.6111111111111) internal successors, (4781), 18 states have internal predecessors, (4781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:04,451 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:04,451 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 333 [2022-07-21 08:51:04,451 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:04,639 INFO L129 PetriNetUnfolder]: 0/316 cut-off events. [2022-07-21 08:51:04,639 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-07-21 08:51:04,640 INFO L84 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 316 events. 0/316 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 670 event pairs, 0 based on Foata normal form. 4/320 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-21 08:51:04,640 INFO L132 encePairwiseOnDemand]: 327/333 looper letters, 25 selfloop transitions, 21 changer transitions 0/289 dead transitions. [2022-07-21 08:51:04,640 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 289 transitions, 811 flow [2022-07-21 08:51:04,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:51:04,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:51:04,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5573 transitions. [2022-07-21 08:51:04,648 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7969397969397969 [2022-07-21 08:51:04,648 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5573 transitions. [2022-07-21 08:51:04,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5573 transitions. [2022-07-21 08:51:04,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:04,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5573 transitions. [2022-07-21 08:51:04,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 265.3809523809524) internal successors, (5573), 21 states have internal predecessors, (5573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:04,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 333.0) internal successors, (7326), 22 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:04,664 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 333.0) internal successors, (7326), 22 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:04,664 INFO L186 Difference]: Start difference. First operand has 286 places, 265 transitions, 611 flow. Second operand 21 states and 5573 transitions. [2022-07-21 08:51:04,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 289 transitions, 811 flow [2022-07-21 08:51:04,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 289 transitions, 797 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:04,670 INFO L242 Difference]: Finished difference. Result has 310 places, 278 transitions, 735 flow [2022-07-21 08:51:04,670 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=735, PETRI_PLACES=310, PETRI_TRANSITIONS=278} [2022-07-21 08:51:04,670 INFO L279 CegarLoopForPetriNet]: 294 programPoint places, 16 predicate places. [2022-07-21 08:51:04,671 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 278 transitions, 735 flow [2022-07-21 08:51:04,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 265.6111111111111) internal successors, (4781), 18 states have internal predecessors, (4781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:04,672 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:04,672 INFO L200 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 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] [2022-07-21 08:51:04,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:04,879 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,SelfDestructingSolverStorable28 [2022-07-21 08:51:04,879 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:04,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:04,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1397501112, now seen corresponding path program 1 times [2022-07-21 08:51:04,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:04,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145769470] [2022-07-21 08:51:04,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:04,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:04,900 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:04,929 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:04,929 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:04,929 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:04,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:04,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-21 08:51:04,930 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-21 08:51:04,930 WARN L231 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:04,930 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-07-21 08:51:04,957 INFO L135 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-07-21 08:51:04,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 324 places, 368 transitions, 856 flow [2022-07-21 08:51:05,800 INFO L129 PetriNetUnfolder]: 1117/5209 cut-off events. [2022-07-21 08:51:05,801 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2022-07-21 08:51:05,897 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6294 conditions, 5209 events. 1117/5209 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 41681 event pairs, 522 based on Foata normal form. 0/4595 useless extension candidates. Maximal degree in co-relation 3256. Up to 1024 conditions per place. [2022-07-21 08:51:05,897 INFO L82 GeneralOperation]: Start removeDead. Operand has 324 places, 368 transitions, 856 flow [2022-07-21 08:51:05,960 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 324 places, 368 transitions, 856 flow [2022-07-21 08:51:05,961 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:05,962 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@9941552, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@186df81b [2022-07-21 08:51:05,962 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:05,965 INFO L129 PetriNetUnfolder]: 6/96 cut-off events. [2022-07-21 08:51:05,965 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:05,965 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:05,965 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:05,965 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:05,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:05,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1825495626, now seen corresponding path program 1 times [2022-07-21 08:51:05,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:05,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812922864] [2022-07-21 08:51:05,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:05,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:05,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:05,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812922864] [2022-07-21 08:51:05,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812922864] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:05,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:05,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:05,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443470647] [2022-07-21 08:51:05,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:05,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:05,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:05,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:05,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:05,985 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 368 [2022-07-21 08:51:05,986 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 368 transitions, 856 flow. Second operand has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:05,986 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:05,986 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 368 [2022-07-21 08:51:05,986 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:07,048 INFO L129 PetriNetUnfolder]: 776/4841 cut-off events. [2022-07-21 08:51:07,049 INFO L130 PetriNetUnfolder]: For 3248/3503 co-relation queries the response was YES. [2022-07-21 08:51:07,182 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7003 conditions, 4841 events. 776/4841 cut-off events. For 3248/3503 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 40415 event pairs, 522 based on Foata normal form. 7350/11919 useless extension candidates. Maximal degree in co-relation 3522. Up to 1072 conditions per place. [2022-07-21 08:51:07,184 INFO L132 encePairwiseOnDemand]: 312/368 looper letters, 17 selfloop transitions, 2 changer transitions 28/318 dead transitions. [2022-07-21 08:51:07,184 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 318 transitions, 810 flow [2022-07-21 08:51:07,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:07,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:07,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 961 transitions. [2022-07-21 08:51:07,186 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8704710144927537 [2022-07-21 08:51:07,186 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 961 transitions. [2022-07-21 08:51:07,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 961 transitions. [2022-07-21 08:51:07,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:07,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 961 transitions. [2022-07-21 08:51:07,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 320.3333333333333) internal successors, (961), 3 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:07,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:07,188 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:07,188 INFO L186 Difference]: Start difference. First operand has 324 places, 368 transitions, 856 flow. Second operand 3 states and 961 transitions. [2022-07-21 08:51:07,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 318 transitions, 810 flow [2022-07-21 08:51:07,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 318 transitions, 810 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:07,193 INFO L242 Difference]: Finished difference. Result has 326 places, 287 transitions, 680 flow [2022-07-21 08:51:07,193 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=680, PETRI_PLACES=326, PETRI_TRANSITIONS=287} [2022-07-21 08:51:07,194 INFO L279 CegarLoopForPetriNet]: 324 programPoint places, 2 predicate places. [2022-07-21 08:51:07,194 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 287 transitions, 680 flow [2022-07-21 08:51:07,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:07,194 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:07,194 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:07,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-21 08:51:07,195 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:07,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:07,195 INFO L85 PathProgramCache]: Analyzing trace with hash -214226908, now seen corresponding path program 1 times [2022-07-21 08:51:07,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:07,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284762167] [2022-07-21 08:51:07,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:07,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:07,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:07,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284762167] [2022-07-21 08:51:07,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284762167] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:07,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916229608] [2022-07-21 08:51:07,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:07,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:07,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:07,221 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) [2022-07-21 08:51:07,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 08:51:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:07,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:07,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:07,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:07,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916229608] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:07,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:07,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:07,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210811321] [2022-07-21 08:51:07,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:07,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:07,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:07,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:07,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:07,385 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 368 [2022-07-21 08:51:07,386 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 287 transitions, 680 flow. Second operand has 10 states, 10 states have (on average 292.3) internal successors, (2923), 10 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:07,386 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:07,386 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 368 [2022-07-21 08:51:07,387 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:07,482 INFO L129 PetriNetUnfolder]: 0/413 cut-off events. [2022-07-21 08:51:07,483 INFO L130 PetriNetUnfolder]: For 115/115 co-relation queries the response was YES. [2022-07-21 08:51:07,483 INFO L84 FinitePrefix]: Finished finitePrefix Result has 551 conditions, 413 events. 0/413 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1177 event pairs, 0 based on Foata normal form. 2/415 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-07-21 08:51:07,484 INFO L132 encePairwiseOnDemand]: 362/368 looper letters, 18 selfloop transitions, 9 changer transitions 0/297 dead transitions. [2022-07-21 08:51:07,484 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 297 transitions, 756 flow [2022-07-21 08:51:07,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:07,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:07,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2639 transitions. [2022-07-21 08:51:07,486 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7967995169082126 [2022-07-21 08:51:07,486 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2639 transitions. [2022-07-21 08:51:07,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2639 transitions. [2022-07-21 08:51:07,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:07,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2639 transitions. [2022-07-21 08:51:07,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 293.22222222222223) internal successors, (2639), 9 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:07,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 368.0) internal successors, (3680), 10 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:07,493 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 368.0) internal successors, (3680), 10 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:07,493 INFO L186 Difference]: Start difference. First operand has 326 places, 287 transitions, 680 flow. Second operand 9 states and 2639 transitions. [2022-07-21 08:51:07,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 297 transitions, 756 flow [2022-07-21 08:51:07,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 297 transitions, 698 flow, removed 28 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:07,497 INFO L242 Difference]: Finished difference. Result has 316 places, 293 transitions, 672 flow [2022-07-21 08:51:07,497 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=672, PETRI_PLACES=316, PETRI_TRANSITIONS=293} [2022-07-21 08:51:07,498 INFO L279 CegarLoopForPetriNet]: 324 programPoint places, -8 predicate places. [2022-07-21 08:51:07,498 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 293 transitions, 672 flow [2022-07-21 08:51:07,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 292.3) internal successors, (2923), 10 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:07,499 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:07,499 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:07,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:07,720 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,SelfDestructingSolverStorable31 [2022-07-21 08:51:07,721 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:07,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:07,721 INFO L85 PathProgramCache]: Analyzing trace with hash 521323549, now seen corresponding path program 1 times [2022-07-21 08:51:07,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:07,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432556818] [2022-07-21 08:51:07,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:07,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:07,782 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:07,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:07,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432556818] [2022-07-21 08:51:07,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432556818] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:07,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099869147] [2022-07-21 08:51:07,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:07,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:07,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:07,785 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) [2022-07-21 08:51:07,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 08:51:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:07,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:51:07,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:07,939 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:07,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:08,010 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:08,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099869147] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:08,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:08,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:51:08,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984837737] [2022-07-21 08:51:08,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:08,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:51:08,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:08,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:51:08,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:51:08,015 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 368 [2022-07-21 08:51:08,017 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 293 transitions, 672 flow. Second operand has 18 states, 18 states have (on average 292.6111111111111) internal successors, (5267), 18 states have internal predecessors, (5267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:08,017 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:08,017 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 368 [2022-07-21 08:51:08,017 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:08,210 INFO L129 PetriNetUnfolder]: 0/365 cut-off events. [2022-07-21 08:51:08,211 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-07-21 08:51:08,211 INFO L84 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 365 events. 0/365 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 856 event pairs, 0 based on Foata normal form. 4/369 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-07-21 08:51:08,212 INFO L132 encePairwiseOnDemand]: 362/368 looper letters, 26 selfloop transitions, 21 changer transitions 0/317 dead transitions. [2022-07-21 08:51:08,212 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 317 transitions, 874 flow [2022-07-21 08:51:08,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:51:08,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:51:08,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6141 transitions. [2022-07-21 08:51:08,216 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7946428571428571 [2022-07-21 08:51:08,216 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6141 transitions. [2022-07-21 08:51:08,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6141 transitions. [2022-07-21 08:51:08,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:08,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6141 transitions. [2022-07-21 08:51:08,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 292.42857142857144) internal successors, (6141), 21 states have internal predecessors, (6141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:08,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 368.0) internal successors, (8096), 22 states have internal predecessors, (8096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:08,232 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 368.0) internal successors, (8096), 22 states have internal predecessors, (8096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:08,232 INFO L186 Difference]: Start difference. First operand has 316 places, 293 transitions, 672 flow. Second operand 21 states and 6141 transitions. [2022-07-21 08:51:08,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 317 transitions, 874 flow [2022-07-21 08:51:08,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 317 transitions, 860 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:08,237 INFO L242 Difference]: Finished difference. Result has 340 places, 306 transitions, 796 flow [2022-07-21 08:51:08,238 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=796, PETRI_PLACES=340, PETRI_TRANSITIONS=306} [2022-07-21 08:51:08,238 INFO L279 CegarLoopForPetriNet]: 324 programPoint places, 16 predicate places. [2022-07-21 08:51:08,238 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 306 transitions, 796 flow [2022-07-21 08:51:08,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 292.6111111111111) internal successors, (5267), 18 states have internal predecessors, (5267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:08,240 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:08,240 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 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] [2022-07-21 08:51:08,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:08,455 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,SelfDestructingSolverStorable32 [2022-07-21 08:51:08,455 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:08,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:08,456 INFO L85 PathProgramCache]: Analyzing trace with hash -314164349, now seen corresponding path program 1 times [2022-07-21 08:51:08,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:08,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326121793] [2022-07-21 08:51:08,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:08,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:08,562 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:08,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:08,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326121793] [2022-07-21 08:51:08,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326121793] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:08,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724159064] [2022-07-21 08:51:08,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:08,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:08,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:08,566 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) [2022-07-21 08:51:08,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 08:51:08,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:08,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:51:08,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:08,793 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:08,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:09,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724159064] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:09,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:09,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:51:09,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867905465] [2022-07-21 08:51:09,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:09,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:51:09,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:09,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:51:09,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:51:09,051 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 368 [2022-07-21 08:51:09,056 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 306 transitions, 796 flow. Second operand has 34 states, 34 states have (on average 292.79411764705884) internal successors, (9955), 34 states have internal predecessors, (9955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:09,056 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:09,056 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 368 [2022-07-21 08:51:09,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:09,314 INFO L129 PetriNetUnfolder]: 0/341 cut-off events. [2022-07-21 08:51:09,314 INFO L130 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-07-21 08:51:09,314 INFO L84 FinitePrefix]: Finished finitePrefix Result has 524 conditions, 341 events. 0/341 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 717 event pairs, 0 based on Foata normal form. 2/343 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-07-21 08:51:09,315 INFO L132 encePairwiseOnDemand]: 363/368 looper letters, 27 selfloop transitions, 25 changer transitions 0/311 dead transitions. [2022-07-21 08:51:09,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 311 transitions, 942 flow [2022-07-21 08:51:09,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 08:51:09,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-21 08:51:09,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7884 transitions. [2022-07-21 08:51:09,320 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7934782608695652 [2022-07-21 08:51:09,321 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7884 transitions. [2022-07-21 08:51:09,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7884 transitions. [2022-07-21 08:51:09,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:09,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7884 transitions. [2022-07-21 08:51:09,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 292.0) internal successors, (7884), 27 states have internal predecessors, (7884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:09,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 368.0) internal successors, (10304), 28 states have internal predecessors, (10304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:09,339 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 368.0) internal successors, (10304), 28 states have internal predecessors, (10304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:09,340 INFO L186 Difference]: Start difference. First operand has 340 places, 306 transitions, 796 flow. Second operand 27 states and 7884 transitions. [2022-07-21 08:51:09,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 311 transitions, 942 flow [2022-07-21 08:51:09,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 311 transitions, 888 flow, removed 7 selfloop flow, removed 13 redundant places. [2022-07-21 08:51:09,345 INFO L242 Difference]: Finished difference. Result has 341 places, 297 transitions, 781 flow [2022-07-21 08:51:09,346 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=781, PETRI_PLACES=341, PETRI_TRANSITIONS=297} [2022-07-21 08:51:09,346 INFO L279 CegarLoopForPetriNet]: 324 programPoint places, 17 predicate places. [2022-07-21 08:51:09,346 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 297 transitions, 781 flow [2022-07-21 08:51:09,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 292.79411764705884) internal successors, (9955), 34 states have internal predecessors, (9955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:09,348 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:09,348 INFO L200 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:09,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:09,563 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,SelfDestructingSolverStorable33 [2022-07-21 08:51:09,563 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:09,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:09,564 INFO L85 PathProgramCache]: Analyzing trace with hash -2097645159, now seen corresponding path program 1 times [2022-07-21 08:51:09,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:09,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876444144] [2022-07-21 08:51:09,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:09,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:09,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:09,594 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:09,634 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:09,636 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:09,636 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:09,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:09,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-21 08:51:09,636 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-21 08:51:09,637 WARN L231 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:09,637 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-07-21 08:51:09,675 INFO L135 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2022-07-21 08:51:09,679 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 354 places, 403 transitions, 950 flow [2022-07-21 08:51:11,679 INFO L129 PetriNetUnfolder]: 2408/10140 cut-off events. [2022-07-21 08:51:11,679 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2022-07-21 08:51:11,856 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12517 conditions, 10140 events. 2408/10140 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 95201 event pairs, 1291 based on Foata normal form. 0/9002 useless extension candidates. Maximal degree in co-relation 6276. Up to 2304 conditions per place. [2022-07-21 08:51:11,856 INFO L82 GeneralOperation]: Start removeDead. Operand has 354 places, 403 transitions, 950 flow [2022-07-21 08:51:11,965 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 354 places, 403 transitions, 950 flow [2022-07-21 08:51:11,966 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:11,967 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@9941552, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@186df81b [2022-07-21 08:51:11,967 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:11,970 INFO L129 PetriNetUnfolder]: 6/96 cut-off events. [2022-07-21 08:51:11,970 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:11,970 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:11,970 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:11,970 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:11,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:11,971 INFO L85 PathProgramCache]: Analyzing trace with hash 239543831, now seen corresponding path program 1 times [2022-07-21 08:51:11,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:11,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889962796] [2022-07-21 08:51:11,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:11,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:11,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:11,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889962796] [2022-07-21 08:51:11,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889962796] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:11,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:11,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:51:11,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153686753] [2022-07-21 08:51:11,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:11,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:51:11,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:11,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:51:11,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:51:11,990 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 403 [2022-07-21 08:51:11,991 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 403 transitions, 950 flow. Second operand has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:11,991 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:11,991 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 403 [2022-07-21 08:51:11,991 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:14,066 INFO L129 PetriNetUnfolder]: 1802/9524 cut-off events. [2022-07-21 08:51:14,066 INFO L130 PetriNetUnfolder]: For 7120/7164 co-relation queries the response was YES. [2022-07-21 08:51:14,183 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14215 conditions, 9524 events. 1802/9524 cut-off events. For 7120/7164 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 91594 event pairs, 1291 based on Foata normal form. 14546/23538 useless extension candidates. Maximal degree in co-relation 6959. Up to 2314 conditions per place. [2022-07-21 08:51:14,188 INFO L132 encePairwiseOnDemand]: 344/403 looper letters, 9 selfloop transitions, 0 changer transitions 29/343 dead transitions. [2022-07-21 08:51:14,188 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 343 transitions, 866 flow [2022-07-21 08:51:14,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:51:14,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:51:14,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 727 transitions. [2022-07-21 08:51:14,190 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.901985111662531 [2022-07-21 08:51:14,190 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 727 transitions. [2022-07-21 08:51:14,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 727 transitions. [2022-07-21 08:51:14,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:14,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 727 transitions. [2022-07-21 08:51:14,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 363.5) internal successors, (727), 2 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:14,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 403.0) internal successors, (1209), 3 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:14,192 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 403.0) internal successors, (1209), 3 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:14,192 INFO L186 Difference]: Start difference. First operand has 354 places, 403 transitions, 950 flow. Second operand 2 states and 727 transitions. [2022-07-21 08:51:14,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 343 transitions, 866 flow [2022-07-21 08:51:14,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 343 transitions, 866 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:14,198 INFO L242 Difference]: Finished difference. Result has 354 places, 314 transitions, 745 flow [2022-07-21 08:51:14,199 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=745, PETRI_PLACES=354, PETRI_TRANSITIONS=314} [2022-07-21 08:51:14,199 INFO L279 CegarLoopForPetriNet]: 354 programPoint places, 0 predicate places. [2022-07-21 08:51:14,199 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 314 transitions, 745 flow [2022-07-21 08:51:14,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:14,200 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:14,200 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:14,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-21 08:51:14,200 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:14,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:14,200 INFO L85 PathProgramCache]: Analyzing trace with hash 368626550, now seen corresponding path program 1 times [2022-07-21 08:51:14,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:14,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290234547] [2022-07-21 08:51:14,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:14,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:14,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:14,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290234547] [2022-07-21 08:51:14,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290234547] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:14,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:14,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:14,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347481098] [2022-07-21 08:51:14,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:14,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:14,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:14,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:14,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:14,219 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 403 [2022-07-21 08:51:14,220 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 314 transitions, 745 flow. Second operand has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:14,220 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:14,220 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 403 [2022-07-21 08:51:14,220 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:14,325 INFO L129 PetriNetUnfolder]: 0/486 cut-off events. [2022-07-21 08:51:14,325 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-07-21 08:51:14,325 INFO L84 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 486 events. 0/486 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1507 event pairs, 0 based on Foata normal form. 0/477 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2022-07-21 08:51:14,326 INFO L132 encePairwiseOnDemand]: 400/403 looper letters, 18 selfloop transitions, 2 changer transitions 0/318 dead transitions. [2022-07-21 08:51:14,326 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 318 transitions, 793 flow [2022-07-21 08:51:14,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:14,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:14,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 975 transitions. [2022-07-21 08:51:14,329 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8064516129032258 [2022-07-21 08:51:14,329 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 975 transitions. [2022-07-21 08:51:14,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 975 transitions. [2022-07-21 08:51:14,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:14,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 975 transitions. [2022-07-21 08:51:14,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.0) internal successors, (975), 3 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:14,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:14,332 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:14,332 INFO L186 Difference]: Start difference. First operand has 354 places, 314 transitions, 745 flow. Second operand 3 states and 975 transitions. [2022-07-21 08:51:14,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 318 transitions, 793 flow [2022-07-21 08:51:14,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 318 transitions, 721 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:14,336 INFO L242 Difference]: Finished difference. Result has 337 places, 315 transitions, 685 flow [2022-07-21 08:51:14,337 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=685, PETRI_PLACES=337, PETRI_TRANSITIONS=315} [2022-07-21 08:51:14,338 INFO L279 CegarLoopForPetriNet]: 354 programPoint places, -17 predicate places. [2022-07-21 08:51:14,339 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 315 transitions, 685 flow [2022-07-21 08:51:14,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:14,339 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:14,339 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:14,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-21 08:51:14,339 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:14,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:14,340 INFO L85 PathProgramCache]: Analyzing trace with hash -559231037, now seen corresponding path program 1 times [2022-07-21 08:51:14,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:14,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049578189] [2022-07-21 08:51:14,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:14,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:14,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:14,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:14,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049578189] [2022-07-21 08:51:14,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049578189] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:14,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637183407] [2022-07-21 08:51:14,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:14,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:14,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:14,366 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) [2022-07-21 08:51:14,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 08:51:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:14,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:14,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:14,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:14,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:14,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637183407] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:14,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:14,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:14,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602454806] [2022-07-21 08:51:14,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:14,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:14,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:14,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:14,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:14,558 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 403 [2022-07-21 08:51:14,559 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 315 transitions, 685 flow. Second operand has 10 states, 10 states have (on average 319.3) internal successors, (3193), 10 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:14,560 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:14,560 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 403 [2022-07-21 08:51:14,560 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:14,766 INFO L129 PetriNetUnfolder]: 0/462 cut-off events. [2022-07-21 08:51:14,766 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-07-21 08:51:14,766 INFO L84 FinitePrefix]: Finished finitePrefix Result has 586 conditions, 462 events. 0/462 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1362 event pairs, 0 based on Foata normal form. 2/464 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-07-21 08:51:14,767 INFO L132 encePairwiseOnDemand]: 397/403 looper letters, 19 selfloop transitions, 9 changer transitions 0/325 dead transitions. [2022-07-21 08:51:14,767 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 325 transitions, 763 flow [2022-07-21 08:51:14,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:14,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:14,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2883 transitions. [2022-07-21 08:51:14,777 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7948717948717948 [2022-07-21 08:51:14,777 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2883 transitions. [2022-07-21 08:51:14,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2883 transitions. [2022-07-21 08:51:14,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:14,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2883 transitions. [2022-07-21 08:51:14,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 320.3333333333333) internal successors, (2883), 9 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:14,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 403.0) internal successors, (4030), 10 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:14,782 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 403.0) internal successors, (4030), 10 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:14,782 INFO L186 Difference]: Start difference. First operand has 337 places, 315 transitions, 685 flow. Second operand 9 states and 2883 transitions. [2022-07-21 08:51:14,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 325 transitions, 763 flow [2022-07-21 08:51:14,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 325 transitions, 761 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:14,787 INFO L242 Difference]: Finished difference. Result has 347 places, 321 transitions, 733 flow [2022-07-21 08:51:14,787 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=733, PETRI_PLACES=347, PETRI_TRANSITIONS=321} [2022-07-21 08:51:14,787 INFO L279 CegarLoopForPetriNet]: 354 programPoint places, -7 predicate places. [2022-07-21 08:51:14,787 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 321 transitions, 733 flow [2022-07-21 08:51:14,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 319.3) internal successors, (3193), 10 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:14,788 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:14,788 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:14,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:15,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:15,004 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:15,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:15,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1878015802, now seen corresponding path program 1 times [2022-07-21 08:51:15,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:15,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145642386] [2022-07-21 08:51:15,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:15,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:15,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:15,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145642386] [2022-07-21 08:51:15,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145642386] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:15,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823655505] [2022-07-21 08:51:15,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:15,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:15,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:15,056 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) [2022-07-21 08:51:15,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 08:51:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:15,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:51:15,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:15,227 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:15,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:15,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823655505] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:15,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:15,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:51:15,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045447713] [2022-07-21 08:51:15,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:15,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:51:15,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:15,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:51:15,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:51:15,300 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 403 [2022-07-21 08:51:15,302 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 321 transitions, 733 flow. Second operand has 18 states, 18 states have (on average 319.6111111111111) internal successors, (5753), 18 states have internal predecessors, (5753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:15,302 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:15,302 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 403 [2022-07-21 08:51:15,302 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:15,500 INFO L129 PetriNetUnfolder]: 0/414 cut-off events. [2022-07-21 08:51:15,500 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-21 08:51:15,500 INFO L84 FinitePrefix]: Finished finitePrefix Result has 591 conditions, 414 events. 0/414 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1040 event pairs, 0 based on Foata normal form. 4/418 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-21 08:51:15,501 INFO L132 encePairwiseOnDemand]: 397/403 looper letters, 27 selfloop transitions, 21 changer transitions 0/345 dead transitions. [2022-07-21 08:51:15,501 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 345 transitions, 937 flow [2022-07-21 08:51:15,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:51:15,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:51:15,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6709 transitions. [2022-07-21 08:51:15,506 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7927448895190831 [2022-07-21 08:51:15,506 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6709 transitions. [2022-07-21 08:51:15,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6709 transitions. [2022-07-21 08:51:15,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:15,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6709 transitions. [2022-07-21 08:51:15,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 319.4761904761905) internal successors, (6709), 21 states have internal predecessors, (6709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:15,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 403.0) internal successors, (8866), 22 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:15,517 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 403.0) internal successors, (8866), 22 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:15,517 INFO L186 Difference]: Start difference. First operand has 347 places, 321 transitions, 733 flow. Second operand 21 states and 6709 transitions. [2022-07-21 08:51:15,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 345 transitions, 937 flow [2022-07-21 08:51:15,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 345 transitions, 923 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:15,522 INFO L242 Difference]: Finished difference. Result has 371 places, 334 transitions, 857 flow [2022-07-21 08:51:15,523 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=857, PETRI_PLACES=371, PETRI_TRANSITIONS=334} [2022-07-21 08:51:15,523 INFO L279 CegarLoopForPetriNet]: 354 programPoint places, 17 predicate places. [2022-07-21 08:51:15,523 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 334 transitions, 857 flow [2022-07-21 08:51:15,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 319.6111111111111) internal successors, (5753), 18 states have internal predecessors, (5753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:15,524 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:15,524 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 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] [2022-07-21 08:51:15,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:15,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-21 08:51:15,735 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:15,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:15,736 INFO L85 PathProgramCache]: Analyzing trace with hash -546906980, now seen corresponding path program 1 times [2022-07-21 08:51:15,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:15,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026090249] [2022-07-21 08:51:15,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:15,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:15,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:15,849 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:15,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:15,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026090249] [2022-07-21 08:51:15,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026090249] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:15,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705996800] [2022-07-21 08:51:15,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:15,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:15,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:15,851 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:15,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 08:51:15,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:15,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:51:15,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:16,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:16,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705996800] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:16,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:16,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:51:16,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412121632] [2022-07-21 08:51:16,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:16,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:51:16,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:16,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:51:16,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:51:16,317 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 403 [2022-07-21 08:51:16,327 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 334 transitions, 857 flow. Second operand has 34 states, 34 states have (on average 319.79411764705884) internal successors, (10873), 34 states have internal predecessors, (10873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:16,327 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:16,327 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 403 [2022-07-21 08:51:16,327 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:16,593 INFO L129 PetriNetUnfolder]: 0/378 cut-off events. [2022-07-21 08:51:16,593 INFO L130 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-07-21 08:51:16,593 INFO L84 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 378 events. 0/378 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 821 event pairs, 0 based on Foata normal form. 3/381 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-21 08:51:16,594 INFO L132 encePairwiseOnDemand]: 398/403 looper letters, 30 selfloop transitions, 28 changer transitions 0/344 dead transitions. [2022-07-21 08:51:16,594 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 344 transitions, 1049 flow [2022-07-21 08:51:16,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 08:51:16,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-21 08:51:16,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 9571 transitions. [2022-07-21 08:51:16,599 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.791645988420182 [2022-07-21 08:51:16,600 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 9571 transitions. [2022-07-21 08:51:16,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 9571 transitions. [2022-07-21 08:51:16,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:16,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 9571 transitions. [2022-07-21 08:51:16,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 319.03333333333336) internal successors, (9571), 30 states have internal predecessors, (9571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:16,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 403.0) internal successors, (12493), 31 states have internal predecessors, (12493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:16,620 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 403.0) internal successors, (12493), 31 states have internal predecessors, (12493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:16,620 INFO L186 Difference]: Start difference. First operand has 371 places, 334 transitions, 857 flow. Second operand 30 states and 9571 transitions. [2022-07-21 08:51:16,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 344 transitions, 1049 flow [2022-07-21 08:51:16,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 344 transitions, 989 flow, removed 8 selfloop flow, removed 13 redundant places. [2022-07-21 08:51:16,625 INFO L242 Difference]: Finished difference. Result has 375 places, 328 transitions, 866 flow [2022-07-21 08:51:16,626 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=866, PETRI_PLACES=375, PETRI_TRANSITIONS=328} [2022-07-21 08:51:16,626 INFO L279 CegarLoopForPetriNet]: 354 programPoint places, 21 predicate places. [2022-07-21 08:51:16,626 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 328 transitions, 866 flow [2022-07-21 08:51:16,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 319.79411764705884) internal successors, (10873), 34 states have internal predecessors, (10873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:16,628 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:16,628 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:16,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:16,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-21 08:51:16,843 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:16,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:16,844 INFO L85 PathProgramCache]: Analyzing trace with hash -2085713552, now seen corresponding path program 1 times [2022-07-21 08:51:16,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:16,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190315186] [2022-07-21 08:51:16,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:16,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:16,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:16,861 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:16,891 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:16,892 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:16,892 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:16,892 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:16,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-21 08:51:16,892 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 08:51:16,893 WARN L231 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:16,893 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-07-21 08:51:16,924 INFO L135 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-07-21 08:51:16,927 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 384 places, 438 transitions, 1046 flow [2022-07-21 08:51:21,161 INFO L129 PetriNetUnfolder]: 5235/20191 cut-off events. [2022-07-21 08:51:21,161 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2022-07-21 08:51:21,586 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25397 conditions, 20191 events. 5235/20191 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 211459 event pairs, 3084 based on Foata normal form. 0/18017 useless extension candidates. Maximal degree in co-relation 12497. Up to 5120 conditions per place. [2022-07-21 08:51:21,586 INFO L82 GeneralOperation]: Start removeDead. Operand has 384 places, 438 transitions, 1046 flow [2022-07-21 08:51:21,903 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 384 places, 438 transitions, 1046 flow [2022-07-21 08:51:21,904 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:21,904 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@9941552, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@186df81b [2022-07-21 08:51:21,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:21,907 INFO L129 PetriNetUnfolder]: 6/96 cut-off events. [2022-07-21 08:51:21,907 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:21,907 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:21,907 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:21,908 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:21,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:21,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1244445289, now seen corresponding path program 1 times [2022-07-21 08:51:21,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:21,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175652282] [2022-07-21 08:51:21,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:21,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:21,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:21,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:21,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175652282] [2022-07-21 08:51:21,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175652282] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:21,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:21,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:51:21,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090456000] [2022-07-21 08:51:21,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:21,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:51:21,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:21,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:51:21,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:51:21,920 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 352 out of 438 [2022-07-21 08:51:21,920 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 438 transitions, 1046 flow. Second operand has 2 states, 2 states have (on average 352.5) internal successors, (705), 2 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:21,921 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:21,921 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 352 of 438 [2022-07-21 08:51:21,921 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:26,503 INFO L129 PetriNetUnfolder]: 4107/19052 cut-off events. [2022-07-21 08:51:26,503 INFO L130 PetriNetUnfolder]: For 15634/15684 co-relation queries the response was YES. [2022-07-21 08:51:26,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29389 conditions, 19052 events. 4107/19052 cut-off events. For 15634/15684 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 207205 event pairs, 3084 based on Foata normal form. 32006/50012 useless extension candidates. Maximal degree in co-relation 14194. Up to 5131 conditions per place. [2022-07-21 08:51:26,749 INFO L132 encePairwiseOnDemand]: 373/438 looper letters, 10 selfloop transitions, 0 changer transitions 30/372 dead transitions. [2022-07-21 08:51:26,749 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 372 transitions, 954 flow [2022-07-21 08:51:26,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:51:26,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:51:26,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 789 transitions. [2022-07-21 08:51:26,751 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9006849315068494 [2022-07-21 08:51:26,751 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 789 transitions. [2022-07-21 08:51:26,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 789 transitions. [2022-07-21 08:51:26,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:26,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 789 transitions. [2022-07-21 08:51:26,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 394.5) internal successors, (789), 2 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:26,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 438.0) internal successors, (1314), 3 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:26,753 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 438.0) internal successors, (1314), 3 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:26,753 INFO L186 Difference]: Start difference. First operand has 384 places, 438 transitions, 1046 flow. Second operand 2 states and 789 transitions. [2022-07-21 08:51:26,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 372 transitions, 954 flow [2022-07-21 08:51:26,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 372 transitions, 954 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:26,763 INFO L242 Difference]: Finished difference. Result has 384 places, 342 transitions, 824 flow [2022-07-21 08:51:26,763 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=824, PETRI_PLACES=384, PETRI_TRANSITIONS=342} [2022-07-21 08:51:26,764 INFO L279 CegarLoopForPetriNet]: 384 programPoint places, 0 predicate places. [2022-07-21 08:51:26,764 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 342 transitions, 824 flow [2022-07-21 08:51:26,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 352.5) internal successors, (705), 2 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:26,764 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:26,764 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:26,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-21 08:51:26,764 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:26,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:26,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1115362570, now seen corresponding path program 1 times [2022-07-21 08:51:26,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:26,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838947855] [2022-07-21 08:51:26,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:26,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:26,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:26,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838947855] [2022-07-21 08:51:26,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838947855] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:26,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:26,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:26,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433137482] [2022-07-21 08:51:26,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:26,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:26,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:26,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:26,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:26,783 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 345 out of 438 [2022-07-21 08:51:26,783 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 342 transitions, 824 flow. Second operand has 3 states, 3 states have (on average 346.0) internal successors, (1038), 3 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:26,783 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:26,783 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 345 of 438 [2022-07-21 08:51:26,783 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:26,899 INFO L129 PetriNetUnfolder]: 0/535 cut-off events. [2022-07-21 08:51:26,899 INFO L130 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-07-21 08:51:26,899 INFO L84 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 535 events. 0/535 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1694 event pairs, 0 based on Foata normal form. 0/525 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-07-21 08:51:26,900 INFO L132 encePairwiseOnDemand]: 435/438 looper letters, 19 selfloop transitions, 2 changer transitions 0/346 dead transitions. [2022-07-21 08:51:26,900 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 346 transitions, 874 flow [2022-07-21 08:51:26,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:26,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:26,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1057 transitions. [2022-07-21 08:51:26,901 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.80441400304414 [2022-07-21 08:51:26,901 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1057 transitions. [2022-07-21 08:51:26,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1057 transitions. [2022-07-21 08:51:26,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:26,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1057 transitions. [2022-07-21 08:51:26,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 352.3333333333333) internal successors, (1057), 3 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:26,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:26,904 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:26,904 INFO L186 Difference]: Start difference. First operand has 384 places, 342 transitions, 824 flow. Second operand 3 states and 1057 transitions. [2022-07-21 08:51:26,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 346 transitions, 874 flow [2022-07-21 08:51:26,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 346 transitions, 784 flow, removed 45 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:26,909 INFO L242 Difference]: Finished difference. Result has 367 places, 343 transitions, 746 flow [2022-07-21 08:51:26,909 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=746, PETRI_PLACES=367, PETRI_TRANSITIONS=343} [2022-07-21 08:51:26,910 INFO L279 CegarLoopForPetriNet]: 384 programPoint places, -17 predicate places. [2022-07-21 08:51:26,910 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 343 transitions, 746 flow [2022-07-21 08:51:26,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 346.0) internal successors, (1038), 3 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:26,910 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:26,910 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:26,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-07-21 08:51:26,910 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:26,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:26,911 INFO L85 PathProgramCache]: Analyzing trace with hash -431888638, now seen corresponding path program 1 times [2022-07-21 08:51:26,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:26,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918138718] [2022-07-21 08:51:26,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:26,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:27,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:27,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:27,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918138718] [2022-07-21 08:51:27,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918138718] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:27,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762380229] [2022-07-21 08:51:27,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:27,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:27,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:27,048 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:27,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 08:51:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:27,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:27,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:27,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:27,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:27,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762380229] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:27,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:27,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:27,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032204757] [2022-07-21 08:51:27,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:27,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:27,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:27,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:27,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:27,227 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 438 [2022-07-21 08:51:27,228 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 343 transitions, 746 flow. Second operand has 10 states, 10 states have (on average 346.3) internal successors, (3463), 10 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:27,228 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:27,228 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 438 [2022-07-21 08:51:27,228 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:27,361 INFO L129 PetriNetUnfolder]: 0/511 cut-off events. [2022-07-21 08:51:27,361 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-21 08:51:27,361 INFO L84 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 511 events. 0/511 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1549 event pairs, 0 based on Foata normal form. 2/513 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-07-21 08:51:27,362 INFO L132 encePairwiseOnDemand]: 432/438 looper letters, 20 selfloop transitions, 9 changer transitions 0/353 dead transitions. [2022-07-21 08:51:27,362 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 353 transitions, 826 flow [2022-07-21 08:51:27,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:27,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:27,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3127 transitions. [2022-07-21 08:51:27,364 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7932521562658549 [2022-07-21 08:51:27,364 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3127 transitions. [2022-07-21 08:51:27,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3127 transitions. [2022-07-21 08:51:27,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:27,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3127 transitions. [2022-07-21 08:51:27,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 347.44444444444446) internal successors, (3127), 9 states have internal predecessors, (3127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:27,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:27,368 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:27,368 INFO L186 Difference]: Start difference. First operand has 367 places, 343 transitions, 746 flow. Second operand 9 states and 3127 transitions. [2022-07-21 08:51:27,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 353 transitions, 826 flow [2022-07-21 08:51:27,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 353 transitions, 824 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:27,373 INFO L242 Difference]: Finished difference. Result has 377 places, 349 transitions, 794 flow [2022-07-21 08:51:27,373 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=794, PETRI_PLACES=377, PETRI_TRANSITIONS=349} [2022-07-21 08:51:27,374 INFO L279 CegarLoopForPetriNet]: 384 programPoint places, -7 predicate places. [2022-07-21 08:51:27,374 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 349 transitions, 794 flow [2022-07-21 08:51:27,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 346.3) internal successors, (3463), 10 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:27,374 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:27,374 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:27,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:27,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:27,579 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:27,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:27,580 INFO L85 PathProgramCache]: Analyzing trace with hash -2076996169, now seen corresponding path program 1 times [2022-07-21 08:51:27,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:27,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005840180] [2022-07-21 08:51:27,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:27,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:27,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:27,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005840180] [2022-07-21 08:51:27,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005840180] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:27,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461630412] [2022-07-21 08:51:27,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:27,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:27,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:27,632 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:27,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 08:51:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:27,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:51:27,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:27,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:27,897 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:27,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461630412] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:27,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:27,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:51:27,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320307778] [2022-07-21 08:51:27,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:27,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:51:27,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:27,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:51:27,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:51:27,902 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 438 [2022-07-21 08:51:27,903 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 349 transitions, 794 flow. Second operand has 18 states, 18 states have (on average 346.6111111111111) internal successors, (6239), 18 states have internal predecessors, (6239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:27,904 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:27,904 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 438 [2022-07-21 08:51:27,904 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:28,131 INFO L129 PetriNetUnfolder]: 0/463 cut-off events. [2022-07-21 08:51:28,131 INFO L130 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-07-21 08:51:28,132 INFO L84 FinitePrefix]: Finished finitePrefix Result has 661 conditions, 463 events. 0/463 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1224 event pairs, 0 based on Foata normal form. 4/467 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-21 08:51:28,132 INFO L132 encePairwiseOnDemand]: 432/438 looper letters, 28 selfloop transitions, 21 changer transitions 0/373 dead transitions. [2022-07-21 08:51:28,132 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 373 transitions, 1000 flow [2022-07-21 08:51:28,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:51:28,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:51:28,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7277 transitions. [2022-07-21 08:51:28,137 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7911502500543597 [2022-07-21 08:51:28,137 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7277 transitions. [2022-07-21 08:51:28,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7277 transitions. [2022-07-21 08:51:28,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:28,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7277 transitions. [2022-07-21 08:51:28,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 346.5238095238095) internal successors, (7277), 21 states have internal predecessors, (7277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:28,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 438.0) internal successors, (9636), 22 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:28,148 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 438.0) internal successors, (9636), 22 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:28,148 INFO L186 Difference]: Start difference. First operand has 377 places, 349 transitions, 794 flow. Second operand 21 states and 7277 transitions. [2022-07-21 08:51:28,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 373 transitions, 1000 flow [2022-07-21 08:51:28,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 373 transitions, 986 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:28,154 INFO L242 Difference]: Finished difference. Result has 401 places, 362 transitions, 918 flow [2022-07-21 08:51:28,154 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=918, PETRI_PLACES=401, PETRI_TRANSITIONS=362} [2022-07-21 08:51:28,155 INFO L279 CegarLoopForPetriNet]: 384 programPoint places, 17 predicate places. [2022-07-21 08:51:28,155 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 362 transitions, 918 flow [2022-07-21 08:51:28,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 346.6111111111111) internal successors, (6239), 18 states have internal predecessors, (6239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:28,156 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:28,156 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 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] [2022-07-21 08:51:28,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:28,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:28,375 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:28,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:28,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1154742421, now seen corresponding path program 1 times [2022-07-21 08:51:28,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:28,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741831042] [2022-07-21 08:51:28,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:28,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:28,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:28,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741831042] [2022-07-21 08:51:28,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741831042] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:28,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665330782] [2022-07-21 08:51:28,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:28,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:28,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:28,505 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:28,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 08:51:28,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:28,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:51:28,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:28,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:28,956 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:28,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665330782] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:28,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:28,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:51:28,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231938226] [2022-07-21 08:51:28,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:28,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:51:28,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:28,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:51:28,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:51:28,962 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 438 [2022-07-21 08:51:28,965 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 362 transitions, 918 flow. Second operand has 34 states, 34 states have (on average 346.79411764705884) internal successors, (11791), 34 states have internal predecessors, (11791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:28,965 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:28,965 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 438 [2022-07-21 08:51:28,965 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:29,292 INFO L129 PetriNetUnfolder]: 0/415 cut-off events. [2022-07-21 08:51:29,292 INFO L130 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-07-21 08:51:29,292 INFO L84 FinitePrefix]: Finished finitePrefix Result has 643 conditions, 415 events. 0/415 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 925 event pairs, 0 based on Foata normal form. 4/419 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-07-21 08:51:29,293 INFO L132 encePairwiseOnDemand]: 433/438 looper letters, 33 selfloop transitions, 31 changer transitions 0/377 dead transitions. [2022-07-21 08:51:29,293 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 377 transitions, 1156 flow [2022-07-21 08:51:29,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 08:51:29,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-21 08:51:29,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 11420 transitions. [2022-07-21 08:51:29,299 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7900927079009271 [2022-07-21 08:51:29,299 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 11420 transitions. [2022-07-21 08:51:29,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 11420 transitions. [2022-07-21 08:51:29,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:29,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 11420 transitions. [2022-07-21 08:51:29,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 346.06060606060606) internal successors, (11420), 33 states have internal predecessors, (11420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:29,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 438.0) internal successors, (14892), 34 states have internal predecessors, (14892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:29,315 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 438.0) internal successors, (14892), 34 states have internal predecessors, (14892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:29,315 INFO L186 Difference]: Start difference. First operand has 401 places, 362 transitions, 918 flow. Second operand 33 states and 11420 transitions. [2022-07-21 08:51:29,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 377 transitions, 1156 flow [2022-07-21 08:51:29,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 377 transitions, 1090 flow, removed 9 selfloop flow, removed 13 redundant places. [2022-07-21 08:51:29,323 INFO L242 Difference]: Finished difference. Result has 408 places, 359 transitions, 951 flow [2022-07-21 08:51:29,323 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=951, PETRI_PLACES=408, PETRI_TRANSITIONS=359} [2022-07-21 08:51:29,324 INFO L279 CegarLoopForPetriNet]: 384 programPoint places, 24 predicate places. [2022-07-21 08:51:29,324 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 359 transitions, 951 flow [2022-07-21 08:51:29,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 346.79411764705884) internal successors, (11791), 34 states have internal predecessors, (11791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:29,325 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:29,326 INFO L200 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 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] [2022-07-21 08:51:29,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:29,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:29,532 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:29,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:29,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1867509715, now seen corresponding path program 1 times [2022-07-21 08:51:29,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:29,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024863625] [2022-07-21 08:51:29,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:29,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:29,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:29,554 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:29,580 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:29,580 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:29,581 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:29,581 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:29,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-21 08:51:29,581 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 08:51:29,581 WARN L231 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:29,582 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2022-07-21 08:51:29,614 INFO L135 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2022-07-21 08:51:29,617 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 414 places, 473 transitions, 1144 flow [2022-07-21 08:51:38,894 INFO L129 PetriNetUnfolder]: 11390/40738 cut-off events. [2022-07-21 08:51:38,895 INFO L130 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2022-07-21 08:51:39,963 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52102 conditions, 40738 events. 11390/40738 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 750. Compared 481835 event pairs, 7181 based on Foata normal form. 0/36504 useless extension candidates. Maximal degree in co-relation 25375. Up to 11264 conditions per place. [2022-07-21 08:51:39,963 INFO L82 GeneralOperation]: Start removeDead. Operand has 414 places, 473 transitions, 1144 flow [2022-07-21 08:51:40,759 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 414 places, 473 transitions, 1144 flow [2022-07-21 08:51:40,760 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:40,760 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@9941552, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@186df81b [2022-07-21 08:51:40,760 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:40,764 INFO L129 PetriNetUnfolder]: 3/87 cut-off events. [2022-07-21 08:51:40,764 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:40,764 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:40,764 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:40,764 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:40,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:40,765 INFO L85 PathProgramCache]: Analyzing trace with hash -2111578409, now seen corresponding path program 1 times [2022-07-21 08:51:40,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:40,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926967370] [2022-07-21 08:51:40,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:40,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:40,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:40,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:40,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926967370] [2022-07-21 08:51:40,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926967370] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:40,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:40,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:51:40,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563201495] [2022-07-21 08:51:40,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:40,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:51:40,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:40,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:51:40,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:51:40,783 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 379 out of 473 [2022-07-21 08:51:40,784 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 473 transitions, 1144 flow. Second operand has 2 states, 2 states have (on average 379.5) internal successors, (759), 2 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:40,784 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:40,784 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 379 of 473 [2022-07-21 08:51:40,784 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand