./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 eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_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-?-eb692b5 [2022-07-19 21:18:17,990 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:18:17,992 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:18:18,028 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:18:18,029 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:18:18,030 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:18:18,032 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:18:18,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:18:18,035 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:18:18,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:18:18,039 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:18:18,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:18:18,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:18:18,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:18:18,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:18:18,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:18:18,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:18:18,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:18:18,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:18:18,055 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:18:18,057 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:18:18,057 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:18:18,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:18:18,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:18:18,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:18:18,065 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:18:18,065 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:18:18,066 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:18:18,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:18:18,067 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:18:18,068 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:18:18,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:18:18,070 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:18:18,070 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:18:18,071 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:18:18,071 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:18:18,071 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:18:18,072 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:18:18,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:18:18,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:18:18,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:18:18,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:18:18,075 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:18:18,098 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:18:18,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:18:18,099 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:18:18,099 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:18:18,099 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:18:18,099 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:18:18,100 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:18:18,100 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:18:18,100 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:18:18,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:18:18,101 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:18:18,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:18:18,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:18:18,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:18:18,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:18:18,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:18:18,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:18:18,102 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:18:18,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:18:18,102 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:18:18,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:18:18,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:18:18,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:18:18,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:18:18,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:18:18,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:18:18,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:18:18,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:18:18,104 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:18:18,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:18:18,104 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:18:18,104 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:18:18,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:18:18,105 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cd6aaa75855c8ee03a174376352b142cf57dd56532b968b1b6c916585172927 [2022-07-19 21:18:18,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:18:18,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:18:18,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:18:18,318 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:18:18,319 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:18:18,319 INFO L432 ainManager$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 [2022-07-19 21:18:18,362 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ee1a2a21/cc7bfb5a8a894a6aae139e9222256951/FLAG08cf142dd [2022-07-19 21:18:18,719 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:18:18,731 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i [2022-07-19 21:18:18,740 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ee1a2a21/cc7bfb5a8a894a6aae139e9222256951/FLAG08cf142dd [2022-07-19 21:18:19,103 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ee1a2a21/cc7bfb5a8a894a6aae139e9222256951 [2022-07-19 21:18:19,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:18:19,127 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:18:19,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:18:19,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:18:19,139 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:18:19,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:18:19" (1/1) ... [2022-07-19 21:18:19,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47896965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:19, skipping insertion in model container [2022-07-19 21:18:19,141 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:18:19" (1/1) ... [2022-07-19 21:18:19,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:18:19,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:18:19,410 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] [2022-07-19 21:18:19,428 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:18:19,436 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:18:19,460 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] [2022-07-19 21:18:19,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:18:19,493 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:18:19,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:19 WrapperNode [2022-07-19 21:18:19,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:18:19,494 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:18:19,494 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:18:19,494 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:18:19,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:19" (1/1) ... [2022-07-19 21:18:19,522 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:19" (1/1) ... [2022-07-19 21:18:19,544 INFO L137 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2022-07-19 21:18:19,544 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:18:19,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:18:19,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:18:19,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:18:19,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:19" (1/1) ... [2022-07-19 21:18:19,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:19" (1/1) ... [2022-07-19 21:18:19,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:19" (1/1) ... [2022-07-19 21:18:19,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:19" (1/1) ... [2022-07-19 21:18:19,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:19" (1/1) ... [2022-07-19 21:18:19,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:19" (1/1) ... [2022-07-19 21:18:19,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:19" (1/1) ... [2022-07-19 21:18:19,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:18:19,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:18:19,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:18:19,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:18:19,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:19" (1/1) ... [2022-07-19 21:18:19,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:18:19,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:19,603 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:18:19,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:18:19,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:18:19,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:18:19,625 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-19 21:18:19,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:18:19,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:18:19,625 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-19 21:18:19,625 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-19 21:18:19,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:18:19,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:18:19,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:18:19,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:18:19,627 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:18:19,695 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:18:19,696 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:18:19,909 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:18:19,915 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:18:19,916 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-19 21:18:19,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:18:19 BoogieIcfgContainer [2022-07-19 21:18:19,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:18:19,920 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:18:19,920 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:18:19,922 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:18:19,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:18:19" (1/3) ... [2022-07-19 21:18:19,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b8802bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:18:19, skipping insertion in model container [2022-07-19 21:18:19,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:19" (2/3) ... [2022-07-19 21:18:19,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b8802bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:18:19, skipping insertion in model container [2022-07-19 21:18:19,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:18:19" (3/3) ... [2022-07-19 21:18:19,924 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_12-ptr_racefree.i [2022-07-19 21:18:19,928 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:18:19,934 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:18:19,934 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:18:19,934 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:18:19,982 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-19 21:18:20,019 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 114 places, 123 transitions, 254 flow [2022-07-19 21:18:20,072 INFO L129 PetriNetUnfolder]: 17/161 cut-off events. [2022-07-19 21:18:20,073 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:18:20,076 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. [2022-07-19 21:18:20,076 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 123 transitions, 254 flow [2022-07-19 21:18:20,081 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 118 transitions, 241 flow [2022-07-19 21:18:20,091 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:20,096 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@28e073db, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7e526556 [2022-07-19 21:18:20,096 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:20,126 INFO L129 PetriNetUnfolder]: 6/97 cut-off events. [2022-07-19 21:18:20,126 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:20,127 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:20,128 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:20,128 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:20,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:20,132 INFO L85 PathProgramCache]: Analyzing trace with hash -41465577, now seen corresponding path program 1 times [2022-07-19 21:18:20,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:20,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103863797] [2022-07-19 21:18:20,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:20,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:20,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:20,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:20,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103863797] [2022-07-19 21:18:20,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103863797] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:20,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:20,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:20,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598189296] [2022-07-19 21:18:20,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:20,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:20,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:20,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:20,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:20,384 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 123 [2022-07-19 21:18:20,389 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) [2022-07-19 21:18:20,389 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:20,389 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 123 [2022-07-19 21:18:20,390 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:20,425 INFO L129 PetriNetUnfolder]: 0/138 cut-off events. [2022-07-19 21:18:20,425 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:18:20,426 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. [2022-07-19 21:18:20,427 INFO L132 encePairwiseOnDemand]: 112/123 looper letters, 1 selfloop transitions, 0 changer transitions 16/106 dead transitions. [2022-07-19 21:18:20,427 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 106 transitions, 219 flow [2022-07-19 21:18:20,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:20,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:20,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 230 transitions. [2022-07-19 21:18:20,441 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9349593495934959 [2022-07-19 21:18:20,442 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 230 transitions. [2022-07-19 21:18:20,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 230 transitions. [2022-07-19 21:18:20,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:20,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 230 transitions. [2022-07-19 21:18:20,450 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) [2022-07-19 21:18:20,455 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) [2022-07-19 21:18:20,455 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) [2022-07-19 21:18:20,457 INFO L186 Difference]: Start difference. First operand has 110 places, 118 transitions, 241 flow. Second operand 2 states and 230 transitions. [2022-07-19 21:18:20,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 106 transitions, 219 flow [2022-07-19 21:18:20,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 106 transitions, 219 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:20,463 INFO L242 Difference]: Finished difference. Result has 110 places, 90 transitions, 185 flow [2022-07-19 21:18:20,464 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} [2022-07-19 21:18:20,470 INFO L279 CegarLoopForPetriNet]: 110 programPoint places, 0 predicate places. [2022-07-19 21:18:20,470 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 90 transitions, 185 flow [2022-07-19 21:18:20,471 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) [2022-07-19 21:18:20,471 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:20,471 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:20,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:18:20,472 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:20,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:20,473 INFO L85 PathProgramCache]: Analyzing trace with hash 87617142, now seen corresponding path program 1 times [2022-07-19 21:18:20,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:20,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145367071] [2022-07-19 21:18:20,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:20,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:20,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:20,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145367071] [2022-07-19 21:18:20,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145367071] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:20,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:20,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:20,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797602274] [2022-07-19 21:18:20,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:20,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:20,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:20,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:20,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:20,574 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 123 [2022-07-19 21:18:20,575 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) [2022-07-19 21:18:20,577 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:20,577 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 123 [2022-07-19 21:18:20,577 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:20,596 INFO L129 PetriNetUnfolder]: 0/94 cut-off events. [2022-07-19 21:18:20,596 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:20,597 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. [2022-07-19 21:18:20,597 INFO L132 encePairwiseOnDemand]: 120/123 looper letters, 8 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2022-07-19 21:18:20,597 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 92 transitions, 209 flow [2022-07-19 21:18:20,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:20,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:20,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 317 transitions. [2022-07-19 21:18:20,601 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8590785907859079 [2022-07-19 21:18:20,601 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 317 transitions. [2022-07-19 21:18:20,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 317 transitions. [2022-07-19 21:18:20,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:20,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 317 transitions. [2022-07-19 21:18:20,602 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) [2022-07-19 21:18:20,603 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) [2022-07-19 21:18:20,603 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) [2022-07-19 21:18:20,603 INFO L186 Difference]: Start difference. First operand has 110 places, 90 transitions, 185 flow. Second operand 3 states and 317 transitions. [2022-07-19 21:18:20,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 92 transitions, 209 flow [2022-07-19 21:18:20,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 92 transitions, 209 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:20,605 INFO L242 Difference]: Finished difference. Result has 97 places, 90 transitions, 193 flow [2022-07-19 21:18:20,605 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} [2022-07-19 21:18:20,606 INFO L279 CegarLoopForPetriNet]: 110 programPoint places, -13 predicate places. [2022-07-19 21:18:20,606 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 90 transitions, 193 flow [2022-07-19 21:18:20,606 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) [2022-07-19 21:18:20,606 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:20,607 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] [2022-07-19 21:18:20,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:18:20,607 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:20,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:20,607 INFO L85 PathProgramCache]: Analyzing trace with hash -228267936, now seen corresponding path program 1 times [2022-07-19 21:18:20,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:20,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008874427] [2022-07-19 21:18:20,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:20,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:20,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:20,648 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:20,688 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:20,688 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:20,689 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:20,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:20,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:18:20,691 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-19 21:18:20,693 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:20,693 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-19 21:18:20,710 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:18:20,712 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 144 places, 158 transitions, 334 flow [2022-07-19 21:18:20,734 INFO L129 PetriNetUnfolder]: 31/259 cut-off events. [2022-07-19 21:18:20,734 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-19 21:18:20,736 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. [2022-07-19 21:18:20,736 INFO L82 GeneralOperation]: Start removeDead. Operand has 144 places, 158 transitions, 334 flow [2022-07-19 21:18:20,737 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 158 transitions, 334 flow [2022-07-19 21:18:20,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:20,743 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@28e073db, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7e526556 [2022-07-19 21:18:20,743 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:20,748 INFO L129 PetriNetUnfolder]: 5/96 cut-off events. [2022-07-19 21:18:20,748 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:20,748 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:20,748 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:20,748 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:20,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:20,749 INFO L85 PathProgramCache]: Analyzing trace with hash 2129631895, now seen corresponding path program 1 times [2022-07-19 21:18:20,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:20,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503273040] [2022-07-19 21:18:20,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:20,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:20,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:20,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:20,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503273040] [2022-07-19 21:18:20,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503273040] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:20,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:20,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:20,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623584439] [2022-07-19 21:18:20,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:20,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:20,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:20,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:20,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:20,801 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 158 [2022-07-19 21:18:20,802 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) [2022-07-19 21:18:20,802 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:20,802 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 158 [2022-07-19 21:18:20,802 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:20,838 INFO L129 PetriNetUnfolder]: 3/228 cut-off events. [2022-07-19 21:18:20,838 INFO L130 PetriNetUnfolder]: For 20/26 co-relation queries the response was YES. [2022-07-19 21:18:20,839 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. [2022-07-19 21:18:20,839 INFO L132 encePairwiseOnDemand]: 141/158 looper letters, 2 selfloop transitions, 0 changer transitions 22/140 dead transitions. [2022-07-19 21:18:20,839 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 140 transitions, 306 flow [2022-07-19 21:18:20,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:20,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:20,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 293 transitions. [2022-07-19 21:18:20,841 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9272151898734177 [2022-07-19 21:18:20,841 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 293 transitions. [2022-07-19 21:18:20,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 293 transitions. [2022-07-19 21:18:20,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:20,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 293 transitions. [2022-07-19 21:18:20,842 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) [2022-07-19 21:18:20,843 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) [2022-07-19 21:18:20,843 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) [2022-07-19 21:18:20,843 INFO L186 Difference]: Start difference. First operand has 144 places, 158 transitions, 334 flow. Second operand 2 states and 293 transitions. [2022-07-19 21:18:20,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 140 transitions, 306 flow [2022-07-19 21:18:20,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 140 transitions, 306 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:20,846 INFO L242 Difference]: Finished difference. Result has 144 places, 118 transitions, 248 flow [2022-07-19 21:18:20,846 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} [2022-07-19 21:18:20,846 INFO L279 CegarLoopForPetriNet]: 144 programPoint places, 0 predicate places. [2022-07-19 21:18:20,846 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 118 transitions, 248 flow [2022-07-19 21:18:20,847 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) [2022-07-19 21:18:20,847 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:20,847 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:20,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:18:20,847 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:20,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:20,848 INFO L85 PathProgramCache]: Analyzing trace with hash -2036252682, now seen corresponding path program 1 times [2022-07-19 21:18:20,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:20,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96111929] [2022-07-19 21:18:20,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:20,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:20,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:20,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96111929] [2022-07-19 21:18:20,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96111929] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:20,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:20,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:20,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523896982] [2022-07-19 21:18:20,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:20,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:20,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:20,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:20,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:20,872 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 158 [2022-07-19 21:18:20,872 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) [2022-07-19 21:18:20,872 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:20,872 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 158 [2022-07-19 21:18:20,872 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:20,894 INFO L129 PetriNetUnfolder]: 0/143 cut-off events. [2022-07-19 21:18:20,894 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:18:20,894 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. [2022-07-19 21:18:20,894 INFO L132 encePairwiseOnDemand]: 155/158 looper letters, 11 selfloop transitions, 2 changer transitions 0/122 dead transitions. [2022-07-19 21:18:20,894 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 122 transitions, 282 flow [2022-07-19 21:18:20,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:20,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:20,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 401 transitions. [2022-07-19 21:18:20,895 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8459915611814346 [2022-07-19 21:18:20,895 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 401 transitions. [2022-07-19 21:18:20,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 401 transitions. [2022-07-19 21:18:20,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:20,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 401 transitions. [2022-07-19 21:18:20,896 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) [2022-07-19 21:18:20,898 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) [2022-07-19 21:18:20,898 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) [2022-07-19 21:18:20,898 INFO L186 Difference]: Start difference. First operand has 144 places, 118 transitions, 248 flow. Second operand 3 states and 401 transitions. [2022-07-19 21:18:20,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 122 transitions, 282 flow [2022-07-19 21:18:20,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 122 transitions, 280 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:20,900 INFO L242 Difference]: Finished difference. Result has 127 places, 119 transitions, 258 flow [2022-07-19 21:18:20,900 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} [2022-07-19 21:18:20,901 INFO L279 CegarLoopForPetriNet]: 144 programPoint places, -17 predicate places. [2022-07-19 21:18:20,901 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 119 transitions, 258 flow [2022-07-19 21:18:20,901 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) [2022-07-19 21:18:20,901 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:20,901 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:20,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:18:20,902 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:20,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:20,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1109826934, now seen corresponding path program 1 times [2022-07-19 21:18:20,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:20,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803497385] [2022-07-19 21:18:20,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:20,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:20,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:20,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:20,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803497385] [2022-07-19 21:18:20,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803497385] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:20,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579924621] [2022-07-19 21:18:20,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:20,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:20,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:20,941 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:20,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:18:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:21,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:21,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:21,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:21,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:21,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:21,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579924621] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:21,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:21,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:21,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725981789] [2022-07-19 21:18:21,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:21,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:21,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:21,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:21,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:21,096 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 158 [2022-07-19 21:18:21,097 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) [2022-07-19 21:18:21,098 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:21,098 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 158 [2022-07-19 21:18:21,098 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:21,151 INFO L129 PetriNetUnfolder]: 0/119 cut-off events. [2022-07-19 21:18:21,151 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:18:21,152 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. [2022-07-19 21:18:21,152 INFO L132 encePairwiseOnDemand]: 153/158 looper letters, 9 selfloop transitions, 7 changer transitions 0/113 dead transitions. [2022-07-19 21:18:21,152 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 113 transitions, 276 flow [2022-07-19 21:18:21,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:21,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:21,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1170 transitions. [2022-07-19 21:18:21,154 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8227848101265823 [2022-07-19 21:18:21,154 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1170 transitions. [2022-07-19 21:18:21,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1170 transitions. [2022-07-19 21:18:21,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:21,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1170 transitions. [2022-07-19 21:18:21,157 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) [2022-07-19 21:18:21,168 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) [2022-07-19 21:18:21,169 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) [2022-07-19 21:18:21,169 INFO L186 Difference]: Start difference. First operand has 127 places, 119 transitions, 258 flow. Second operand 9 states and 1170 transitions. [2022-07-19 21:18:21,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 113 transitions, 276 flow [2022-07-19 21:18:21,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 113 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:21,171 INFO L242 Difference]: Finished difference. Result has 122 places, 109 transitions, 248 flow [2022-07-19 21:18:21,171 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} [2022-07-19 21:18:21,172 INFO L279 CegarLoopForPetriNet]: 144 programPoint places, -22 predicate places. [2022-07-19 21:18:21,172 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 109 transitions, 248 flow [2022-07-19 21:18:21,173 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) [2022-07-19 21:18:21,173 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:21,173 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] [2022-07-19 21:18:21,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:21,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-19 21:18:21,391 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:21,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:21,391 INFO L85 PathProgramCache]: Analyzing trace with hash -253022611, now seen corresponding path program 1 times [2022-07-19 21:18:21,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:21,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961911609] [2022-07-19 21:18:21,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:21,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:21,418 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:21,443 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:21,443 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:21,443 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:21,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:21,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:18:21,444 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-19 21:18:21,444 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:21,444 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-19 21:18:21,458 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-19 21:18:21,459 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 174 places, 193 transitions, 416 flow [2022-07-19 21:18:21,493 INFO L129 PetriNetUnfolder]: 50/390 cut-off events. [2022-07-19 21:18:21,493 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-19 21:18:21,496 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. [2022-07-19 21:18:21,496 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 193 transitions, 416 flow [2022-07-19 21:18:21,500 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 193 transitions, 416 flow [2022-07-19 21:18:21,500 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:21,502 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@28e073db, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7e526556 [2022-07-19 21:18:21,502 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:21,506 INFO L129 PetriNetUnfolder]: 3/87 cut-off events. [2022-07-19 21:18:21,509 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:21,509 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:21,510 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:21,510 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:21,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:21,510 INFO L85 PathProgramCache]: Analyzing trace with hash 622618071, now seen corresponding path program 1 times [2022-07-19 21:18:21,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:21,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797080039] [2022-07-19 21:18:21,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:21,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:21,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:21,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:21,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:21,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797080039] [2022-07-19 21:18:21,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797080039] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:21,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:21,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:21,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439232124] [2022-07-19 21:18:21,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:21,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:21,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:21,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:21,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:21,538 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 193 [2022-07-19 21:18:21,538 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) [2022-07-19 21:18:21,538 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:21,538 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 193 [2022-07-19 21:18:21,538 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:21,588 INFO L129 PetriNetUnfolder]: 8/344 cut-off events. [2022-07-19 21:18:21,588 INFO L130 PetriNetUnfolder]: For 55/69 co-relation queries the response was YES. [2022-07-19 21:18:21,589 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. [2022-07-19 21:18:21,590 INFO L132 encePairwiseOnDemand]: 170/193 looper letters, 3 selfloop transitions, 0 changer transitions 23/169 dead transitions. [2022-07-19 21:18:21,590 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 169 transitions, 380 flow [2022-07-19 21:18:21,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:21,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:21,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 355 transitions. [2022-07-19 21:18:21,591 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9196891191709845 [2022-07-19 21:18:21,591 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 355 transitions. [2022-07-19 21:18:21,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 355 transitions. [2022-07-19 21:18:21,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:21,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 355 transitions. [2022-07-19 21:18:21,594 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) [2022-07-19 21:18:21,595 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) [2022-07-19 21:18:21,595 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) [2022-07-19 21:18:21,595 INFO L186 Difference]: Start difference. First operand has 174 places, 193 transitions, 416 flow. Second operand 2 states and 355 transitions. [2022-07-19 21:18:21,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 169 transitions, 380 flow [2022-07-19 21:18:21,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 169 transitions, 380 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:21,599 INFO L242 Difference]: Finished difference. Result has 174 places, 146 transitions, 313 flow [2022-07-19 21:18:21,599 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} [2022-07-19 21:18:21,600 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 0 predicate places. [2022-07-19 21:18:21,600 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 146 transitions, 313 flow [2022-07-19 21:18:21,602 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) [2022-07-19 21:18:21,602 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:21,602 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:21,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:18:21,602 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:21,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:21,602 INFO L85 PathProgramCache]: Analyzing trace with hash 751700790, now seen corresponding path program 1 times [2022-07-19 21:18:21,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:21,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372715781] [2022-07-19 21:18:21,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:21,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:21,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:21,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372715781] [2022-07-19 21:18:21,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372715781] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:21,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:21,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:21,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016495927] [2022-07-19 21:18:21,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:21,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:21,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:21,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:21,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:21,639 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 193 [2022-07-19 21:18:21,639 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) [2022-07-19 21:18:21,640 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:21,640 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 193 [2022-07-19 21:18:21,640 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:21,690 INFO L129 PetriNetUnfolder]: 0/192 cut-off events. [2022-07-19 21:18:21,690 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:18:21,690 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. [2022-07-19 21:18:21,690 INFO L132 encePairwiseOnDemand]: 190/193 looper letters, 12 selfloop transitions, 2 changer transitions 0/150 dead transitions. [2022-07-19 21:18:21,690 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 150 transitions, 349 flow [2022-07-19 21:18:21,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:21,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:21,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2022-07-19 21:18:21,691 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8341968911917098 [2022-07-19 21:18:21,691 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 483 transitions. [2022-07-19 21:18:21,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 483 transitions. [2022-07-19 21:18:21,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:21,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 483 transitions. [2022-07-19 21:18:21,692 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) [2022-07-19 21:18:21,693 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) [2022-07-19 21:18:21,693 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) [2022-07-19 21:18:21,693 INFO L186 Difference]: Start difference. First operand has 174 places, 146 transitions, 313 flow. Second operand 3 states and 483 transitions. [2022-07-19 21:18:21,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 150 transitions, 349 flow [2022-07-19 21:18:21,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 150 transitions, 343 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:21,696 INFO L242 Difference]: Finished difference. Result has 157 places, 147 transitions, 319 flow [2022-07-19 21:18:21,696 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} [2022-07-19 21:18:21,697 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, -17 predicate places. [2022-07-19 21:18:21,697 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 147 transitions, 319 flow [2022-07-19 21:18:21,698 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) [2022-07-19 21:18:21,698 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:21,698 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:21,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 21:18:21,698 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:21,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:21,698 INFO L85 PathProgramCache]: Analyzing trace with hash 6057065, now seen corresponding path program 1 times [2022-07-19 21:18:21,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:21,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537802250] [2022-07-19 21:18:21,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:21,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:21,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:21,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537802250] [2022-07-19 21:18:21,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537802250] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:21,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478688110] [2022-07-19 21:18:21,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:21,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:21,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:21,759 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:21,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:18:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:21,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:21,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:21,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:21,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:21,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:21,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478688110] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:21,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:21,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:21,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792959580] [2022-07-19 21:18:21,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:21,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:21,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:21,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:21,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:21,888 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 193 [2022-07-19 21:18:21,890 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) [2022-07-19 21:18:21,890 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:21,890 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 193 [2022-07-19 21:18:21,890 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:21,945 INFO L129 PetriNetUnfolder]: 0/168 cut-off events. [2022-07-19 21:18:21,946 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-19 21:18:21,946 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. [2022-07-19 21:18:21,946 INFO L132 encePairwiseOnDemand]: 187/193 looper letters, 13 selfloop transitions, 9 changer transitions 0/157 dead transitions. [2022-07-19 21:18:21,946 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 157 transitions, 385 flow [2022-07-19 21:18:21,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:21,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:21,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1419 transitions. [2022-07-19 21:18:21,948 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8169257340241797 [2022-07-19 21:18:21,948 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1419 transitions. [2022-07-19 21:18:21,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1419 transitions. [2022-07-19 21:18:21,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:21,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1419 transitions. [2022-07-19 21:18:21,951 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) [2022-07-19 21:18:21,953 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) [2022-07-19 21:18:21,953 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) [2022-07-19 21:18:21,953 INFO L186 Difference]: Start difference. First operand has 157 places, 147 transitions, 319 flow. Second operand 9 states and 1419 transitions. [2022-07-19 21:18:21,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 157 transitions, 385 flow [2022-07-19 21:18:21,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 157 transitions, 383 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:21,955 INFO L242 Difference]: Finished difference. Result has 167 places, 153 transitions, 367 flow [2022-07-19 21:18:21,956 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} [2022-07-19 21:18:21,956 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, -7 predicate places. [2022-07-19 21:18:21,956 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 153 transitions, 367 flow [2022-07-19 21:18:21,957 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) [2022-07-19 21:18:21,957 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:21,957 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] [2022-07-19 21:18:21,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:22,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 21:18:22,174 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:22,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:22,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1094259264, now seen corresponding path program 1 times [2022-07-19 21:18:22,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:22,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313924221] [2022-07-19 21:18:22,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:22,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:22,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:22,186 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:22,217 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:22,217 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:22,217 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:22,217 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:22,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 21:18:22,217 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-19 21:18:22,218 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:22,218 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-19 21:18:22,249 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-19 21:18:22,250 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 204 places, 228 transitions, 500 flow [2022-07-19 21:18:22,322 INFO L129 PetriNetUnfolder]: 81/589 cut-off events. [2022-07-19 21:18:22,322 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-19 21:18:22,326 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. [2022-07-19 21:18:22,327 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 228 transitions, 500 flow [2022-07-19 21:18:22,330 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 228 transitions, 500 flow [2022-07-19 21:18:22,331 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:22,331 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@28e073db, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7e526556 [2022-07-19 21:18:22,331 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:22,335 INFO L129 PetriNetUnfolder]: 6/95 cut-off events. [2022-07-19 21:18:22,336 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:22,336 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:22,336 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:22,336 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:22,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:22,336 INFO L85 PathProgramCache]: Analyzing trace with hash -267539753, now seen corresponding path program 1 times [2022-07-19 21:18:22,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:22,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900621221] [2022-07-19 21:18:22,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:22,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:22,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:22,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:22,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900621221] [2022-07-19 21:18:22,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900621221] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:22,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:22,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:22,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043542387] [2022-07-19 21:18:22,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:22,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:22,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:22,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:22,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:22,347 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 228 [2022-07-19 21:18:22,347 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) [2022-07-19 21:18:22,347 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:22,347 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 228 [2022-07-19 21:18:22,348 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:22,410 INFO L129 PetriNetUnfolder]: 21/524 cut-off events. [2022-07-19 21:18:22,410 INFO L130 PetriNetUnfolder]: For 126/140 co-relation queries the response was YES. [2022-07-19 21:18:22,413 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. [2022-07-19 21:18:22,413 INFO L132 encePairwiseOnDemand]: 199/228 looper letters, 4 selfloop transitions, 0 changer transitions 24/198 dead transitions. [2022-07-19 21:18:22,413 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 198 transitions, 456 flow [2022-07-19 21:18:22,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:22,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:22,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 417 transitions. [2022-07-19 21:18:22,414 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9144736842105263 [2022-07-19 21:18:22,414 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 417 transitions. [2022-07-19 21:18:22,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 417 transitions. [2022-07-19 21:18:22,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:22,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 417 transitions. [2022-07-19 21:18:22,415 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) [2022-07-19 21:18:22,416 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) [2022-07-19 21:18:22,416 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) [2022-07-19 21:18:22,416 INFO L186 Difference]: Start difference. First operand has 204 places, 228 transitions, 500 flow. Second operand 2 states and 417 transitions. [2022-07-19 21:18:22,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 198 transitions, 456 flow [2022-07-19 21:18:22,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 198 transitions, 456 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:22,419 INFO L242 Difference]: Finished difference. Result has 204 places, 174 transitions, 380 flow [2022-07-19 21:18:22,419 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} [2022-07-19 21:18:22,420 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, 0 predicate places. [2022-07-19 21:18:22,420 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 174 transitions, 380 flow [2022-07-19 21:18:22,420 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) [2022-07-19 21:18:22,420 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:22,420 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:22,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 21:18:22,420 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:22,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:22,420 INFO L85 PathProgramCache]: Analyzing trace with hash -138457034, now seen corresponding path program 1 times [2022-07-19 21:18:22,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:22,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810170645] [2022-07-19 21:18:22,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:22,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:22,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:22,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810170645] [2022-07-19 21:18:22,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810170645] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:22,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:22,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:22,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655139359] [2022-07-19 21:18:22,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:22,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:22,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:22,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:22,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:22,436 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 228 [2022-07-19 21:18:22,436 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) [2022-07-19 21:18:22,436 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:22,436 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 228 [2022-07-19 21:18:22,436 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:22,485 INFO L129 PetriNetUnfolder]: 0/241 cut-off events. [2022-07-19 21:18:22,485 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-19 21:18:22,485 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. [2022-07-19 21:18:22,486 INFO L132 encePairwiseOnDemand]: 225/228 looper letters, 13 selfloop transitions, 2 changer transitions 0/178 dead transitions. [2022-07-19 21:18:22,486 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 178 transitions, 418 flow [2022-07-19 21:18:22,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:22,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:22,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 565 transitions. [2022-07-19 21:18:22,487 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8260233918128655 [2022-07-19 21:18:22,487 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 565 transitions. [2022-07-19 21:18:22,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 565 transitions. [2022-07-19 21:18:22,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:22,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 565 transitions. [2022-07-19 21:18:22,489 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) [2022-07-19 21:18:22,490 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) [2022-07-19 21:18:22,490 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) [2022-07-19 21:18:22,490 INFO L186 Difference]: Start difference. First operand has 204 places, 174 transitions, 380 flow. Second operand 3 states and 565 transitions. [2022-07-19 21:18:22,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 178 transitions, 418 flow [2022-07-19 21:18:22,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 178 transitions, 406 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:22,492 INFO L242 Difference]: Finished difference. Result has 187 places, 175 transitions, 380 flow [2022-07-19 21:18:22,493 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} [2022-07-19 21:18:22,493 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, -17 predicate places. [2022-07-19 21:18:22,493 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 175 transitions, 380 flow [2022-07-19 21:18:22,493 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) [2022-07-19 21:18:22,493 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:22,493 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:22,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 21:18:22,494 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:22,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:22,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1594287592, now seen corresponding path program 1 times [2022-07-19 21:18:22,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:22,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322239132] [2022-07-19 21:18:22,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:22,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:22,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:22,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322239132] [2022-07-19 21:18:22,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322239132] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:22,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994511954] [2022-07-19 21:18:22,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:22,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:22,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:22,527 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:22,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:18:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:22,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:22,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:22,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:22,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:22,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994511954] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:22,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:22,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:22,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604642056] [2022-07-19 21:18:22,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:22,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:22,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:22,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:22,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:22,672 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 228 [2022-07-19 21:18:22,674 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) [2022-07-19 21:18:22,674 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:22,674 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 228 [2022-07-19 21:18:22,674 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:22,738 INFO L129 PetriNetUnfolder]: 0/217 cut-off events. [2022-07-19 21:18:22,738 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-19 21:18:22,738 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. [2022-07-19 21:18:22,739 INFO L132 encePairwiseOnDemand]: 222/228 looper letters, 14 selfloop transitions, 9 changer transitions 0/185 dead transitions. [2022-07-19 21:18:22,739 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 185 transitions, 448 flow [2022-07-19 21:18:22,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:22,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:22,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1663 transitions. [2022-07-19 21:18:22,741 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8104288499025342 [2022-07-19 21:18:22,741 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1663 transitions. [2022-07-19 21:18:22,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1663 transitions. [2022-07-19 21:18:22,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:22,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1663 transitions. [2022-07-19 21:18:22,744 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) [2022-07-19 21:18:22,746 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) [2022-07-19 21:18:22,747 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) [2022-07-19 21:18:22,747 INFO L186 Difference]: Start difference. First operand has 187 places, 175 transitions, 380 flow. Second operand 9 states and 1663 transitions. [2022-07-19 21:18:22,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 185 transitions, 448 flow [2022-07-19 21:18:22,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 185 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:22,749 INFO L242 Difference]: Finished difference. Result has 197 places, 181 transitions, 428 flow [2022-07-19 21:18:22,750 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} [2022-07-19 21:18:22,750 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, -7 predicate places. [2022-07-19 21:18:22,750 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 181 transitions, 428 flow [2022-07-19 21:18:22,751 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) [2022-07-19 21:18:22,751 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:22,751 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:22,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 21:18:22,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:22,965 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:22,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:22,965 INFO L85 PathProgramCache]: Analyzing trace with hash 2107054441, now seen corresponding path program 1 times [2022-07-19 21:18:22,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:22,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485588050] [2022-07-19 21:18:22,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:22,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:23,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:23,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485588050] [2022-07-19 21:18:23,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485588050] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:23,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24745427] [2022-07-19 21:18:23,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:23,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:23,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:23,051 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:23,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:18:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:23,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:23,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:23,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:23,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24745427] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:23,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:23,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:23,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674114231] [2022-07-19 21:18:23,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:23,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:23,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:23,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:23,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:23,253 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 228 [2022-07-19 21:18:23,255 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) [2022-07-19 21:18:23,255 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:23,255 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 228 [2022-07-19 21:18:23,255 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:23,364 INFO L129 PetriNetUnfolder]: 0/193 cut-off events. [2022-07-19 21:18:23,364 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-07-19 21:18:23,364 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. [2022-07-19 21:18:23,365 INFO L132 encePairwiseOnDemand]: 223/228 looper letters, 15 selfloop transitions, 13 changer transitions 0/179 dead transitions. [2022-07-19 21:18:23,365 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 179 transitions, 492 flow [2022-07-19 21:18:23,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 21:18:23,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-19 21:18:23,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2760 transitions. [2022-07-19 21:18:23,369 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8070175438596491 [2022-07-19 21:18:23,369 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2760 transitions. [2022-07-19 21:18:23,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2760 transitions. [2022-07-19 21:18:23,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:23,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2760 transitions. [2022-07-19 21:18:23,373 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) [2022-07-19 21:18:23,377 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) [2022-07-19 21:18:23,377 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) [2022-07-19 21:18:23,377 INFO L186 Difference]: Start difference. First operand has 197 places, 181 transitions, 428 flow. Second operand 15 states and 2760 transitions. [2022-07-19 21:18:23,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 179 transitions, 492 flow [2022-07-19 21:18:23,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 179 transitions, 475 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-07-19 21:18:23,380 INFO L242 Difference]: Finished difference. Result has 195 places, 172 transitions, 424 flow [2022-07-19 21:18:23,380 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} [2022-07-19 21:18:23,381 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, -9 predicate places. [2022-07-19 21:18:23,381 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 172 transitions, 424 flow [2022-07-19 21:18:23,382 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) [2022-07-19 21:18:23,382 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:23,382 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] [2022-07-19 21:18:23,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:23,598 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 [2022-07-19 21:18:23,599 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:23,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:23,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1678445639, now seen corresponding path program 1 times [2022-07-19 21:18:23,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:23,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105972933] [2022-07-19 21:18:23,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:23,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:23,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:23,612 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:23,625 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:23,626 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:23,626 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:23,626 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:23,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 21:18:23,626 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 21:18:23,639 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:23,639 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-19 21:18:23,668 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-19 21:18:23,670 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 234 places, 263 transitions, 586 flow [2022-07-19 21:18:23,770 INFO L129 PetriNetUnfolder]: 140/928 cut-off events. [2022-07-19 21:18:23,770 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-19 21:18:23,784 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. [2022-07-19 21:18:23,784 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 263 transitions, 586 flow [2022-07-19 21:18:23,794 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 234 places, 263 transitions, 586 flow [2022-07-19 21:18:23,795 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:23,795 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@28e073db, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7e526556 [2022-07-19 21:18:23,795 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:23,799 INFO L129 PetriNetUnfolder]: 6/97 cut-off events. [2022-07-19 21:18:23,799 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:23,799 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:23,799 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:23,800 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:23,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:23,800 INFO L85 PathProgramCache]: Analyzing trace with hash -540841577, now seen corresponding path program 1 times [2022-07-19 21:18:23,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:23,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027821070] [2022-07-19 21:18:23,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:23,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:23,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:23,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027821070] [2022-07-19 21:18:23,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027821070] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:23,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:23,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:23,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268052335] [2022-07-19 21:18:23,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:23,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:23,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:23,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:23,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:23,820 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 263 [2022-07-19 21:18:23,821 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) [2022-07-19 21:18:23,821 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:23,821 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 263 [2022-07-19 21:18:23,821 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:23,935 INFO L129 PetriNetUnfolder]: 54/836 cut-off events. [2022-07-19 21:18:23,935 INFO L130 PetriNetUnfolder]: For 293/319 co-relation queries the response was YES. [2022-07-19 21:18:23,943 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. [2022-07-19 21:18:23,945 INFO L132 encePairwiseOnDemand]: 228/263 looper letters, 5 selfloop transitions, 0 changer transitions 25/227 dead transitions. [2022-07-19 21:18:23,945 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 227 transitions, 534 flow [2022-07-19 21:18:23,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:23,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:23,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 479 transitions. [2022-07-19 21:18:23,946 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9106463878326996 [2022-07-19 21:18:23,947 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 479 transitions. [2022-07-19 21:18:23,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 479 transitions. [2022-07-19 21:18:23,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:23,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 479 transitions. [2022-07-19 21:18:23,948 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) [2022-07-19 21:18:23,949 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) [2022-07-19 21:18:23,949 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) [2022-07-19 21:18:23,949 INFO L186 Difference]: Start difference. First operand has 234 places, 263 transitions, 586 flow. Second operand 2 states and 479 transitions. [2022-07-19 21:18:23,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 227 transitions, 534 flow [2022-07-19 21:18:23,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 227 transitions, 534 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:23,953 INFO L242 Difference]: Finished difference. Result has 234 places, 202 transitions, 449 flow [2022-07-19 21:18:23,954 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} [2022-07-19 21:18:23,955 INFO L279 CegarLoopForPetriNet]: 234 programPoint places, 0 predicate places. [2022-07-19 21:18:23,955 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 202 transitions, 449 flow [2022-07-19 21:18:23,955 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) [2022-07-19 21:18:23,955 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:23,955 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:23,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 21:18:23,956 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:23,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:23,956 INFO L85 PathProgramCache]: Analyzing trace with hash -411758858, now seen corresponding path program 1 times [2022-07-19 21:18:23,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:23,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110761705] [2022-07-19 21:18:23,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:23,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:23,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:23,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110761705] [2022-07-19 21:18:23,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110761705] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:23,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:23,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:23,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605804502] [2022-07-19 21:18:23,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:23,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:23,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:23,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:23,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:23,987 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 263 [2022-07-19 21:18:23,987 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) [2022-07-19 21:18:23,987 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:23,987 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 263 [2022-07-19 21:18:23,987 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:24,032 INFO L129 PetriNetUnfolder]: 0/290 cut-off events. [2022-07-19 21:18:24,032 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-19 21:18:24,032 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. [2022-07-19 21:18:24,033 INFO L132 encePairwiseOnDemand]: 260/263 looper letters, 14 selfloop transitions, 2 changer transitions 0/206 dead transitions. [2022-07-19 21:18:24,033 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 206 transitions, 489 flow [2022-07-19 21:18:24,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:24,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:24,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 647 transitions. [2022-07-19 21:18:24,035 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8200253485424588 [2022-07-19 21:18:24,035 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 647 transitions. [2022-07-19 21:18:24,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 647 transitions. [2022-07-19 21:18:24,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:24,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 647 transitions. [2022-07-19 21:18:24,040 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) [2022-07-19 21:18:24,041 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) [2022-07-19 21:18:24,041 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) [2022-07-19 21:18:24,041 INFO L186 Difference]: Start difference. First operand has 234 places, 202 transitions, 449 flow. Second operand 3 states and 647 transitions. [2022-07-19 21:18:24,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 206 transitions, 489 flow [2022-07-19 21:18:24,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 206 transitions, 469 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:24,044 INFO L242 Difference]: Finished difference. Result has 217 places, 203 transitions, 441 flow [2022-07-19 21:18:24,045 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} [2022-07-19 21:18:24,045 INFO L279 CegarLoopForPetriNet]: 234 programPoint places, -17 predicate places. [2022-07-19 21:18:24,045 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 203 transitions, 441 flow [2022-07-19 21:18:24,045 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) [2022-07-19 21:18:24,045 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:24,045 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:24,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 21:18:24,046 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:24,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:24,046 INFO L85 PathProgramCache]: Analyzing trace with hash -640102649, now seen corresponding path program 1 times [2022-07-19 21:18:24,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:24,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494294421] [2022-07-19 21:18:24,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:24,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:24,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:24,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494294421] [2022-07-19 21:18:24,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494294421] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:24,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244655190] [2022-07-19 21:18:24,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:24,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:24,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:24,112 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:24,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:18:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:24,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:24,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:24,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:24,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:24,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244655190] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:24,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:24,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:24,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592977936] [2022-07-19 21:18:24,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:24,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:24,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:24,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:24,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:24,243 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 263 [2022-07-19 21:18:24,249 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) [2022-07-19 21:18:24,249 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:24,249 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 263 [2022-07-19 21:18:24,250 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:24,332 INFO L129 PetriNetUnfolder]: 0/266 cut-off events. [2022-07-19 21:18:24,332 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:18:24,333 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. [2022-07-19 21:18:24,333 INFO L132 encePairwiseOnDemand]: 257/263 looper letters, 15 selfloop transitions, 9 changer transitions 0/213 dead transitions. [2022-07-19 21:18:24,333 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 213 transitions, 511 flow [2022-07-19 21:18:24,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:24,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:24,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1907 transitions. [2022-07-19 21:18:24,337 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8056611744824672 [2022-07-19 21:18:24,337 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1907 transitions. [2022-07-19 21:18:24,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1907 transitions. [2022-07-19 21:18:24,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:24,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1907 transitions. [2022-07-19 21:18:24,341 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) [2022-07-19 21:18:24,343 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) [2022-07-19 21:18:24,344 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) [2022-07-19 21:18:24,344 INFO L186 Difference]: Start difference. First operand has 217 places, 203 transitions, 441 flow. Second operand 9 states and 1907 transitions. [2022-07-19 21:18:24,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 213 transitions, 511 flow [2022-07-19 21:18:24,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 213 transitions, 509 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:24,347 INFO L242 Difference]: Finished difference. Result has 227 places, 209 transitions, 489 flow [2022-07-19 21:18:24,348 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} [2022-07-19 21:18:24,348 INFO L279 CegarLoopForPetriNet]: 234 programPoint places, -7 predicate places. [2022-07-19 21:18:24,348 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 209 transitions, 489 flow [2022-07-19 21:18:24,349 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) [2022-07-19 21:18:24,349 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:24,349 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:24,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:24,559 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 [2022-07-19 21:18:24,559 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:24,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:24,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1059240186, now seen corresponding path program 1 times [2022-07-19 21:18:24,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:24,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718170934] [2022-07-19 21:18:24,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:24,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:24,628 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:24,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:24,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718170934] [2022-07-19 21:18:24,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718170934] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:24,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464539656] [2022-07-19 21:18:24,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:24,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:24,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:24,630 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:24,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:18:24,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:24,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:24,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:24,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:24,826 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:24,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464539656] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:24,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:24,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:24,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647701001] [2022-07-19 21:18:24,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:24,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:24,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:24,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:24,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:24,842 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 263 [2022-07-19 21:18:24,844 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) [2022-07-19 21:18:24,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:24,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 263 [2022-07-19 21:18:24,844 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:25,046 INFO L129 PetriNetUnfolder]: 0/230 cut-off events. [2022-07-19 21:18:25,059 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-07-19 21:18:25,059 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. [2022-07-19 21:18:25,060 INFO L132 encePairwiseOnDemand]: 258/263 looper letters, 18 selfloop transitions, 16 changer transitions 0/212 dead transitions. [2022-07-19 21:18:25,060 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 212 transitions, 589 flow [2022-07-19 21:18:25,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 21:18:25,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-19 21:18:25,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3799 transitions. [2022-07-19 21:18:25,066 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8024926066751161 [2022-07-19 21:18:25,066 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3799 transitions. [2022-07-19 21:18:25,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3799 transitions. [2022-07-19 21:18:25,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:25,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3799 transitions. [2022-07-19 21:18:25,073 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) [2022-07-19 21:18:25,092 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) [2022-07-19 21:18:25,093 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) [2022-07-19 21:18:25,093 INFO L186 Difference]: Start difference. First operand has 227 places, 209 transitions, 489 flow. Second operand 18 states and 3799 transitions. [2022-07-19 21:18:25,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 212 transitions, 589 flow [2022-07-19 21:18:25,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 212 transitions, 568 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-07-19 21:18:25,097 INFO L242 Difference]: Finished difference. Result has 228 places, 203 transitions, 504 flow [2022-07-19 21:18:25,097 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} [2022-07-19 21:18:25,098 INFO L279 CegarLoopForPetriNet]: 234 programPoint places, -6 predicate places. [2022-07-19 21:18:25,098 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 203 transitions, 504 flow [2022-07-19 21:18:25,099 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) [2022-07-19 21:18:25,099 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:25,099 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] [2022-07-19 21:18:25,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:25,316 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 [2022-07-19 21:18:25,317 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:25,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:25,317 INFO L85 PathProgramCache]: Analyzing trace with hash -597627464, now seen corresponding path program 1 times [2022-07-19 21:18:25,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:25,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803094119] [2022-07-19 21:18:25,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:25,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:25,331 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:25,347 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:25,348 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:25,348 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:25,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:25,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-19 21:18:25,350 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 21:18:25,351 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:25,351 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-19 21:18:25,373 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-19 21:18:25,375 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 264 places, 298 transitions, 674 flow [2022-07-19 21:18:25,563 INFO L129 PetriNetUnfolder]: 263/1555 cut-off events. [2022-07-19 21:18:25,564 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-07-19 21:18:25,585 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. [2022-07-19 21:18:25,585 INFO L82 GeneralOperation]: Start removeDead. Operand has 264 places, 298 transitions, 674 flow [2022-07-19 21:18:25,596 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 264 places, 298 transitions, 674 flow [2022-07-19 21:18:25,597 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:25,597 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@28e073db, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7e526556 [2022-07-19 21:18:25,597 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:25,601 INFO L129 PetriNetUnfolder]: 3/87 cut-off events. [2022-07-19 21:18:25,601 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:25,601 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:25,601 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:25,601 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:25,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:25,601 INFO L85 PathProgramCache]: Analyzing trace with hash -197287401, now seen corresponding path program 1 times [2022-07-19 21:18:25,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:25,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925190502] [2022-07-19 21:18:25,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:25,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:25,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:25,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:25,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925190502] [2022-07-19 21:18:25,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925190502] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:25,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:25,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:25,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818821019] [2022-07-19 21:18:25,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:25,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:25,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:25,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:25,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:25,612 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 298 [2022-07-19 21:18:25,613 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) [2022-07-19 21:18:25,613 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:25,613 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 298 [2022-07-19 21:18:25,613 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:25,862 INFO L129 PetriNetUnfolder]: 135/1420 cut-off events. [2022-07-19 21:18:25,862 INFO L130 PetriNetUnfolder]: For 651/675 co-relation queries the response was YES. [2022-07-19 21:18:25,871 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. [2022-07-19 21:18:25,872 INFO L132 encePairwiseOnDemand]: 257/298 looper letters, 6 selfloop transitions, 0 changer transitions 26/256 dead transitions. [2022-07-19 21:18:25,872 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 256 transitions, 614 flow [2022-07-19 21:18:25,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:25,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:25,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 541 transitions. [2022-07-19 21:18:25,874 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9077181208053692 [2022-07-19 21:18:25,874 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 541 transitions. [2022-07-19 21:18:25,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 541 transitions. [2022-07-19 21:18:25,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:25,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 541 transitions. [2022-07-19 21:18:25,875 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) [2022-07-19 21:18:25,876 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) [2022-07-19 21:18:25,876 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) [2022-07-19 21:18:25,876 INFO L186 Difference]: Start difference. First operand has 264 places, 298 transitions, 674 flow. Second operand 2 states and 541 transitions. [2022-07-19 21:18:25,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 256 transitions, 614 flow [2022-07-19 21:18:25,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 256 transitions, 614 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:25,879 INFO L242 Difference]: Finished difference. Result has 264 places, 230 transitions, 520 flow [2022-07-19 21:18:25,880 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} [2022-07-19 21:18:25,880 INFO L279 CegarLoopForPetriNet]: 264 programPoint places, 0 predicate places. [2022-07-19 21:18:25,880 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 230 transitions, 520 flow [2022-07-19 21:18:25,880 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) [2022-07-19 21:18:25,880 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:25,881 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:25,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-19 21:18:25,881 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:25,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:25,881 INFO L85 PathProgramCache]: Analyzing trace with hash -68204682, now seen corresponding path program 1 times [2022-07-19 21:18:25,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:25,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007221572] [2022-07-19 21:18:25,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:25,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:25,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:25,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:25,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007221572] [2022-07-19 21:18:25,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007221572] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:25,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:25,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:25,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681996603] [2022-07-19 21:18:25,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:25,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:25,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:25,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:25,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:25,896 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 298 [2022-07-19 21:18:25,897 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) [2022-07-19 21:18:25,897 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:25,897 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 298 [2022-07-19 21:18:25,897 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:25,943 INFO L129 PetriNetUnfolder]: 0/339 cut-off events. [2022-07-19 21:18:25,943 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-19 21:18:25,943 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. [2022-07-19 21:18:25,944 INFO L132 encePairwiseOnDemand]: 295/298 looper letters, 15 selfloop transitions, 2 changer transitions 0/234 dead transitions. [2022-07-19 21:18:25,944 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 234 transitions, 562 flow [2022-07-19 21:18:25,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:25,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:25,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 729 transitions. [2022-07-19 21:18:25,945 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8154362416107382 [2022-07-19 21:18:25,946 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 729 transitions. [2022-07-19 21:18:25,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 729 transitions. [2022-07-19 21:18:25,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:25,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 729 transitions. [2022-07-19 21:18:25,947 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) [2022-07-19 21:18:25,948 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) [2022-07-19 21:18:25,948 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) [2022-07-19 21:18:25,948 INFO L186 Difference]: Start difference. First operand has 264 places, 230 transitions, 520 flow. Second operand 3 states and 729 transitions. [2022-07-19 21:18:25,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 234 transitions, 562 flow [2022-07-19 21:18:25,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 234 transitions, 532 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:25,951 INFO L242 Difference]: Finished difference. Result has 247 places, 231 transitions, 502 flow [2022-07-19 21:18:25,952 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} [2022-07-19 21:18:25,952 INFO L279 CegarLoopForPetriNet]: 264 programPoint places, -17 predicate places. [2022-07-19 21:18:25,952 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 231 transitions, 502 flow [2022-07-19 21:18:25,953 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) [2022-07-19 21:18:25,953 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:25,953 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:25,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-19 21:18:25,953 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:25,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:25,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1892820934, now seen corresponding path program 1 times [2022-07-19 21:18:25,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:25,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365966107] [2022-07-19 21:18:25,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:25,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:25,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:25,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365966107] [2022-07-19 21:18:25,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365966107] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:25,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605894103] [2022-07-19 21:18:25,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:25,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:25,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:25,977 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:25,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:18:26,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:26,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:26,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:26,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:26,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:26,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:26,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605894103] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:26,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:26,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:26,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525340648] [2022-07-19 21:18:26,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:26,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:26,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:26,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:26,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:26,116 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 298 [2022-07-19 21:18:26,117 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) [2022-07-19 21:18:26,117 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:26,118 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 298 [2022-07-19 21:18:26,118 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:26,198 INFO L129 PetriNetUnfolder]: 0/315 cut-off events. [2022-07-19 21:18:26,198 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-19 21:18:26,199 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. [2022-07-19 21:18:26,199 INFO L132 encePairwiseOnDemand]: 292/298 looper letters, 16 selfloop transitions, 9 changer transitions 0/241 dead transitions. [2022-07-19 21:18:26,199 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 241 transitions, 574 flow [2022-07-19 21:18:26,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:26,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:26,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2151 transitions. [2022-07-19 21:18:26,203 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.802013422818792 [2022-07-19 21:18:26,203 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2151 transitions. [2022-07-19 21:18:26,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2151 transitions. [2022-07-19 21:18:26,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:26,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2151 transitions. [2022-07-19 21:18:26,206 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) [2022-07-19 21:18:26,209 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) [2022-07-19 21:18:26,209 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) [2022-07-19 21:18:26,209 INFO L186 Difference]: Start difference. First operand has 247 places, 231 transitions, 502 flow. Second operand 9 states and 2151 transitions. [2022-07-19 21:18:26,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 241 transitions, 574 flow [2022-07-19 21:18:26,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 241 transitions, 572 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:26,212 INFO L242 Difference]: Finished difference. Result has 257 places, 237 transitions, 550 flow [2022-07-19 21:18:26,213 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} [2022-07-19 21:18:26,213 INFO L279 CegarLoopForPetriNet]: 264 programPoint places, -7 predicate places. [2022-07-19 21:18:26,213 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 237 transitions, 550 flow [2022-07-19 21:18:26,214 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) [2022-07-19 21:18:26,214 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:26,214 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:26,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:26,429 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 [2022-07-19 21:18:26,429 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:26,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:26,430 INFO L85 PathProgramCache]: Analyzing trace with hash -947304445, now seen corresponding path program 1 times [2022-07-19 21:18:26,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:26,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323111842] [2022-07-19 21:18:26,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:26,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:26,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:26,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323111842] [2022-07-19 21:18:26,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323111842] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:26,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854292698] [2022-07-19 21:18:26,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:26,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:26,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:26,478 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:26,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 21:18:26,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:26,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:26,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:26,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:26,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854292698] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:26,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:26,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:26,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558818242] [2022-07-19 21:18:26,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:26,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:26,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:26,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:26,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:26,687 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 298 [2022-07-19 21:18:26,690 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) [2022-07-19 21:18:26,690 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:26,690 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 298 [2022-07-19 21:18:26,690 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:26,839 INFO L129 PetriNetUnfolder]: 0/267 cut-off events. [2022-07-19 21:18:26,839 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-19 21:18:26,840 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. [2022-07-19 21:18:26,840 INFO L132 encePairwiseOnDemand]: 293/298 looper letters, 21 selfloop transitions, 19 changer transitions 0/245 dead transitions. [2022-07-19 21:18:26,840 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 245 transitions, 686 flow [2022-07-19 21:18:26,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:18:26,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:18:26,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5000 transitions. [2022-07-19 21:18:26,845 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7989773090444231 [2022-07-19 21:18:26,845 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5000 transitions. [2022-07-19 21:18:26,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5000 transitions. [2022-07-19 21:18:26,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:26,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5000 transitions. [2022-07-19 21:18:26,872 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) [2022-07-19 21:18:26,878 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) [2022-07-19 21:18:26,879 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) [2022-07-19 21:18:26,879 INFO L186 Difference]: Start difference. First operand has 257 places, 237 transitions, 550 flow. Second operand 21 states and 5000 transitions. [2022-07-19 21:18:26,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 245 transitions, 686 flow [2022-07-19 21:18:26,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 245 transitions, 661 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-07-19 21:18:26,883 INFO L242 Difference]: Finished difference. Result has 261 places, 234 transitions, 584 flow [2022-07-19 21:18:26,883 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} [2022-07-19 21:18:26,883 INFO L279 CegarLoopForPetriNet]: 264 programPoint places, -3 predicate places. [2022-07-19 21:18:26,884 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 234 transitions, 584 flow [2022-07-19 21:18:26,885 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) [2022-07-19 21:18:26,885 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:26,885 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] [2022-07-19 21:18:26,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:27,103 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 [2022-07-19 21:18:27,103 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:27,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:27,103 INFO L85 PathProgramCache]: Analyzing trace with hash -480155363, now seen corresponding path program 1 times [2022-07-19 21:18:27,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:27,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253032526] [2022-07-19 21:18:27,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:27,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:27,133 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:27,152 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:27,163 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:27,163 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:27,163 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:27,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-19 21:18:27,164 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 21:18:27,164 WARN L231 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:27,164 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-07-19 21:18:27,200 INFO L135 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2022-07-19 21:18:27,202 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 294 places, 333 transitions, 764 flow [2022-07-19 21:18:27,732 INFO L129 PetriNetUnfolder]: 530/2774 cut-off events. [2022-07-19 21:18:27,732 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2022-07-19 21:18:27,772 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. [2022-07-19 21:18:27,773 INFO L82 GeneralOperation]: Start removeDead. Operand has 294 places, 333 transitions, 764 flow [2022-07-19 21:18:27,794 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 294 places, 333 transitions, 764 flow [2022-07-19 21:18:27,795 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:27,795 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@28e073db, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7e526556 [2022-07-19 21:18:27,795 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:27,799 INFO L129 PetriNetUnfolder]: 4/89 cut-off events. [2022-07-19 21:18:27,799 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:27,799 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:27,799 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:27,799 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:27,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:27,799 INFO L85 PathProgramCache]: Analyzing trace with hash 892205494, now seen corresponding path program 1 times [2022-07-19 21:18:27,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:27,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667828964] [2022-07-19 21:18:27,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:27,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:27,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:27,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:27,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667828964] [2022-07-19 21:18:27,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667828964] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:27,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:27,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:27,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284299292] [2022-07-19 21:18:27,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:27,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:27,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:27,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:27,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:27,814 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 333 [2022-07-19 21:18:27,815 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) [2022-07-19 21:18:27,815 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:27,815 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 333 [2022-07-19 21:18:27,815 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:28,314 INFO L129 PetriNetUnfolder]: 327/2545 cut-off events. [2022-07-19 21:18:28,314 INFO L130 PetriNetUnfolder]: For 1469/1674 co-relation queries the response was YES. [2022-07-19 21:18:28,332 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. [2022-07-19 21:18:28,334 INFO L132 encePairwiseOnDemand]: 283/333 looper letters, 16 selfloop transitions, 2 changer transitions 27/289 dead transitions. [2022-07-19 21:18:28,334 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 289 transitions, 726 flow [2022-07-19 21:18:28,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:28,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:28,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 872 transitions. [2022-07-19 21:18:28,336 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8728728728728729 [2022-07-19 21:18:28,336 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 872 transitions. [2022-07-19 21:18:28,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 872 transitions. [2022-07-19 21:18:28,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:28,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 872 transitions. [2022-07-19 21:18:28,337 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) [2022-07-19 21:18:28,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,338 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,338 INFO L186 Difference]: Start difference. First operand has 294 places, 333 transitions, 764 flow. Second operand 3 states and 872 transitions. [2022-07-19 21:18:28,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 289 transitions, 726 flow [2022-07-19 21:18:28,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 289 transitions, 726 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:28,343 INFO L242 Difference]: Finished difference. Result has 296 places, 259 transitions, 605 flow [2022-07-19 21:18:28,343 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} [2022-07-19 21:18:28,343 INFO L279 CegarLoopForPetriNet]: 294 programPoint places, 2 predicate places. [2022-07-19 21:18:28,343 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 259 transitions, 605 flow [2022-07-19 21:18:28,344 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) [2022-07-19 21:18:28,344 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:28,344 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:28,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-19 21:18:28,344 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:28,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:28,344 INFO L85 PathProgramCache]: Analyzing trace with hash 603123749, now seen corresponding path program 1 times [2022-07-19 21:18:28,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:28,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979962181] [2022-07-19 21:18:28,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:28,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:28,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:28,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979962181] [2022-07-19 21:18:28,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979962181] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:28,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056147747] [2022-07-19 21:18:28,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:28,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:28,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:28,367 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:28,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 21:18:28,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:28,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:28,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:28,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:28,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:28,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:28,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056147747] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:28,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:28,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:28,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896242496] [2022-07-19 21:18:28,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:28,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:28,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:28,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:28,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:28,507 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 333 [2022-07-19 21:18:28,508 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) [2022-07-19 21:18:28,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:28,509 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 333 [2022-07-19 21:18:28,509 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:28,597 INFO L129 PetriNetUnfolder]: 0/364 cut-off events. [2022-07-19 21:18:28,598 INFO L130 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2022-07-19 21:18:28,598 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. [2022-07-19 21:18:28,599 INFO L132 encePairwiseOnDemand]: 327/333 looper letters, 17 selfloop transitions, 9 changer transitions 0/269 dead transitions. [2022-07-19 21:18:28,599 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 269 transitions, 679 flow [2022-07-19 21:18:28,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:28,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:28,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2395 transitions. [2022-07-19 21:18:28,601 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7991324657991324 [2022-07-19 21:18:28,601 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2395 transitions. [2022-07-19 21:18:28,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2395 transitions. [2022-07-19 21:18:28,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:28,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2395 transitions. [2022-07-19 21:18:28,604 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) [2022-07-19 21:18:28,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,607 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,607 INFO L186 Difference]: Start difference. First operand has 296 places, 259 transitions, 605 flow. Second operand 9 states and 2395 transitions. [2022-07-19 21:18:28,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 269 transitions, 679 flow [2022-07-19 21:18:28,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 269 transitions, 635 flow, removed 21 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:28,668 INFO L242 Difference]: Finished difference. Result has 286 places, 265 transitions, 611 flow [2022-07-19 21:18:28,668 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} [2022-07-19 21:18:28,668 INFO L279 CegarLoopForPetriNet]: 294 programPoint places, -8 predicate places. [2022-07-19 21:18:28,668 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 265 transitions, 611 flow [2022-07-19 21:18:28,669 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) [2022-07-19 21:18:28,669 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:28,669 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:28,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:28,875 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 [2022-07-19 21:18:28,875 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:28,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:28,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1852105632, now seen corresponding path program 1 times [2022-07-19 21:18:28,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:28,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687044170] [2022-07-19 21:18:28,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:28,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:28,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:28,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:28,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687044170] [2022-07-19 21:18:28,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687044170] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:28,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553595175] [2022-07-19 21:18:28,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:28,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:28,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:28,954 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:28,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 21:18:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:29,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:29,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:29,123 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:29,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:29,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553595175] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:29,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:29,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:29,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919980719] [2022-07-19 21:18:29,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:29,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:29,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:29,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:29,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:29,201 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 333 [2022-07-19 21:18:29,204 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) [2022-07-19 21:18:29,204 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:29,204 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 333 [2022-07-19 21:18:29,204 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:29,387 INFO L129 PetriNetUnfolder]: 0/316 cut-off events. [2022-07-19 21:18:29,388 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-07-19 21:18:29,388 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. [2022-07-19 21:18:29,389 INFO L132 encePairwiseOnDemand]: 327/333 looper letters, 25 selfloop transitions, 21 changer transitions 0/289 dead transitions. [2022-07-19 21:18:29,389 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 289 transitions, 811 flow [2022-07-19 21:18:29,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:18:29,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:18:29,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5573 transitions. [2022-07-19 21:18:29,394 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7969397969397969 [2022-07-19 21:18:29,394 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5573 transitions. [2022-07-19 21:18:29,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5573 transitions. [2022-07-19 21:18:29,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:29,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5573 transitions. [2022-07-19 21:18:29,402 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) [2022-07-19 21:18:29,407 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) [2022-07-19 21:18:29,408 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) [2022-07-19 21:18:29,408 INFO L186 Difference]: Start difference. First operand has 286 places, 265 transitions, 611 flow. Second operand 21 states and 5573 transitions. [2022-07-19 21:18:29,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 289 transitions, 811 flow [2022-07-19 21:18:29,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 289 transitions, 797 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:29,413 INFO L242 Difference]: Finished difference. Result has 310 places, 278 transitions, 735 flow [2022-07-19 21:18:29,413 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} [2022-07-19 21:18:29,414 INFO L279 CegarLoopForPetriNet]: 294 programPoint places, 16 predicate places. [2022-07-19 21:18:29,414 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 278 transitions, 735 flow [2022-07-19 21:18:29,415 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) [2022-07-19 21:18:29,415 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:29,415 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] [2022-07-19 21:18:29,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:29,633 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 [2022-07-19 21:18:29,633 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:29,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:29,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1397501112, now seen corresponding path program 1 times [2022-07-19 21:18:29,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:29,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674421625] [2022-07-19 21:18:29,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:29,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:29,649 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:29,678 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:29,678 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:29,679 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:29,679 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:29,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-19 21:18:29,679 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-19 21:18:29,679 WARN L231 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:29,679 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-07-19 21:18:29,706 INFO L135 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-07-19 21:18:29,709 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 324 places, 368 transitions, 856 flow [2022-07-19 21:18:30,689 INFO L129 PetriNetUnfolder]: 1117/5209 cut-off events. [2022-07-19 21:18:30,689 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2022-07-19 21:18:30,760 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. [2022-07-19 21:18:30,761 INFO L82 GeneralOperation]: Start removeDead. Operand has 324 places, 368 transitions, 856 flow [2022-07-19 21:18:30,810 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 324 places, 368 transitions, 856 flow [2022-07-19 21:18:30,810 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:30,811 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@28e073db, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7e526556 [2022-07-19 21:18:30,811 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:30,814 INFO L129 PetriNetUnfolder]: 6/96 cut-off events. [2022-07-19 21:18:30,814 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:30,815 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:30,815 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:30,815 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:30,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:30,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1825495626, now seen corresponding path program 1 times [2022-07-19 21:18:30,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:30,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365926935] [2022-07-19 21:18:30,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:30,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:30,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:30,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365926935] [2022-07-19 21:18:30,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365926935] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:30,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:30,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:30,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148983053] [2022-07-19 21:18:30,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:30,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:30,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:30,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:30,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:30,831 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 368 [2022-07-19 21:18:30,832 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) [2022-07-19 21:18:30,832 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:30,832 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 368 [2022-07-19 21:18:30,832 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:31,883 INFO L129 PetriNetUnfolder]: 776/4841 cut-off events. [2022-07-19 21:18:31,884 INFO L130 PetriNetUnfolder]: For 3248/3503 co-relation queries the response was YES. [2022-07-19 21:18:31,932 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. [2022-07-19 21:18:31,938 INFO L132 encePairwiseOnDemand]: 312/368 looper letters, 17 selfloop transitions, 2 changer transitions 28/318 dead transitions. [2022-07-19 21:18:31,938 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 318 transitions, 810 flow [2022-07-19 21:18:31,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:31,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:31,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 961 transitions. [2022-07-19 21:18:31,940 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8704710144927537 [2022-07-19 21:18:31,940 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 961 transitions. [2022-07-19 21:18:31,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 961 transitions. [2022-07-19 21:18:31,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:31,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 961 transitions. [2022-07-19 21:18:31,942 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) [2022-07-19 21:18:31,945 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) [2022-07-19 21:18:31,946 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) [2022-07-19 21:18:31,946 INFO L186 Difference]: Start difference. First operand has 324 places, 368 transitions, 856 flow. Second operand 3 states and 961 transitions. [2022-07-19 21:18:31,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 318 transitions, 810 flow [2022-07-19 21:18:31,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 318 transitions, 810 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:31,952 INFO L242 Difference]: Finished difference. Result has 326 places, 287 transitions, 680 flow [2022-07-19 21:18:31,952 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} [2022-07-19 21:18:31,953 INFO L279 CegarLoopForPetriNet]: 324 programPoint places, 2 predicate places. [2022-07-19 21:18:31,953 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 287 transitions, 680 flow [2022-07-19 21:18:31,953 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) [2022-07-19 21:18:31,953 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:31,953 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:31,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-19 21:18:31,954 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:31,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:31,954 INFO L85 PathProgramCache]: Analyzing trace with hash -214226908, now seen corresponding path program 1 times [2022-07-19 21:18:31,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:31,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505899031] [2022-07-19 21:18:31,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:31,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:31,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:31,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505899031] [2022-07-19 21:18:31,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505899031] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:31,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224414052] [2022-07-19 21:18:31,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:31,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:31,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:31,983 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:31,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 21:18:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:32,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:32,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:32,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:32,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:32,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224414052] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:32,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:32,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:32,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360282247] [2022-07-19 21:18:32,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:32,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:32,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:32,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:32,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:32,145 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 368 [2022-07-19 21:18:32,147 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) [2022-07-19 21:18:32,147 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:32,147 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 368 [2022-07-19 21:18:32,147 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:32,266 INFO L129 PetriNetUnfolder]: 0/413 cut-off events. [2022-07-19 21:18:32,267 INFO L130 PetriNetUnfolder]: For 115/115 co-relation queries the response was YES. [2022-07-19 21:18:32,267 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. [2022-07-19 21:18:32,268 INFO L132 encePairwiseOnDemand]: 362/368 looper letters, 18 selfloop transitions, 9 changer transitions 0/297 dead transitions. [2022-07-19 21:18:32,268 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 297 transitions, 756 flow [2022-07-19 21:18:32,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:32,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:32,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2639 transitions. [2022-07-19 21:18:32,271 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7967995169082126 [2022-07-19 21:18:32,271 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2639 transitions. [2022-07-19 21:18:32,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2639 transitions. [2022-07-19 21:18:32,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:32,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2639 transitions. [2022-07-19 21:18:32,276 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) [2022-07-19 21:18:32,279 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) [2022-07-19 21:18:32,279 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) [2022-07-19 21:18:32,279 INFO L186 Difference]: Start difference. First operand has 326 places, 287 transitions, 680 flow. Second operand 9 states and 2639 transitions. [2022-07-19 21:18:32,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 297 transitions, 756 flow [2022-07-19 21:18:32,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 297 transitions, 698 flow, removed 28 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:32,284 INFO L242 Difference]: Finished difference. Result has 316 places, 293 transitions, 672 flow [2022-07-19 21:18:32,284 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} [2022-07-19 21:18:32,284 INFO L279 CegarLoopForPetriNet]: 324 programPoint places, -8 predicate places. [2022-07-19 21:18:32,284 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 293 transitions, 672 flow [2022-07-19 21:18:32,285 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) [2022-07-19 21:18:32,286 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:32,286 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:32,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:32,499 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 [2022-07-19 21:18:32,499 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:32,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:32,500 INFO L85 PathProgramCache]: Analyzing trace with hash 521323549, now seen corresponding path program 1 times [2022-07-19 21:18:32,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:32,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462644192] [2022-07-19 21:18:32,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:32,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:32,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:32,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:32,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462644192] [2022-07-19 21:18:32,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462644192] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:32,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081356658] [2022-07-19 21:18:32,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:32,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:32,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:32,553 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:32,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 21:18:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:32,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:32,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:32,723 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:32,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:32,798 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:32,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081356658] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:32,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:32,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:32,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966470630] [2022-07-19 21:18:32,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:32,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:32,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:32,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:32,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:32,803 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 368 [2022-07-19 21:18:32,806 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) [2022-07-19 21:18:32,806 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:32,806 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 368 [2022-07-19 21:18:32,807 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:33,001 INFO L129 PetriNetUnfolder]: 0/365 cut-off events. [2022-07-19 21:18:33,001 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-07-19 21:18:33,002 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. [2022-07-19 21:18:33,002 INFO L132 encePairwiseOnDemand]: 362/368 looper letters, 26 selfloop transitions, 21 changer transitions 0/317 dead transitions. [2022-07-19 21:18:33,003 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 317 transitions, 874 flow [2022-07-19 21:18:33,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:18:33,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:18:33,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6141 transitions. [2022-07-19 21:18:33,008 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7946428571428571 [2022-07-19 21:18:33,008 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6141 transitions. [2022-07-19 21:18:33,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6141 transitions. [2022-07-19 21:18:33,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:33,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6141 transitions. [2022-07-19 21:18:33,017 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) [2022-07-19 21:18:33,023 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) [2022-07-19 21:18:33,023 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) [2022-07-19 21:18:33,023 INFO L186 Difference]: Start difference. First operand has 316 places, 293 transitions, 672 flow. Second operand 21 states and 6141 transitions. [2022-07-19 21:18:33,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 317 transitions, 874 flow [2022-07-19 21:18:33,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 317 transitions, 860 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:33,028 INFO L242 Difference]: Finished difference. Result has 340 places, 306 transitions, 796 flow [2022-07-19 21:18:33,028 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} [2022-07-19 21:18:33,029 INFO L279 CegarLoopForPetriNet]: 324 programPoint places, 16 predicate places. [2022-07-19 21:18:33,029 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 306 transitions, 796 flow [2022-07-19 21:18:33,030 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) [2022-07-19 21:18:33,030 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:33,030 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] [2022-07-19 21:18:33,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:33,247 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 [2022-07-19 21:18:33,248 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:33,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:33,248 INFO L85 PathProgramCache]: Analyzing trace with hash -314164349, now seen corresponding path program 1 times [2022-07-19 21:18:33,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:33,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9037548] [2022-07-19 21:18:33,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:33,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:33,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:33,396 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:33,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:33,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9037548] [2022-07-19 21:18:33,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9037548] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:33,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588773564] [2022-07-19 21:18:33,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:33,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:33,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:33,399 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:33,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 21:18:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:33,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:18:33,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:33,667 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:33,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:33,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588773564] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:33,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:33,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:18:33,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148426066] [2022-07-19 21:18:33,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:33,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:18:33,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:33,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:18:33,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:18:33,905 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 368 [2022-07-19 21:18:33,909 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) [2022-07-19 21:18:33,909 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:33,909 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 368 [2022-07-19 21:18:33,909 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:34,162 INFO L129 PetriNetUnfolder]: 0/341 cut-off events. [2022-07-19 21:18:34,162 INFO L130 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-07-19 21:18:34,163 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. [2022-07-19 21:18:34,163 INFO L132 encePairwiseOnDemand]: 363/368 looper letters, 27 selfloop transitions, 25 changer transitions 0/311 dead transitions. [2022-07-19 21:18:34,163 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 311 transitions, 942 flow [2022-07-19 21:18:34,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 21:18:34,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-19 21:18:34,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7884 transitions. [2022-07-19 21:18:34,169 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7934782608695652 [2022-07-19 21:18:34,169 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7884 transitions. [2022-07-19 21:18:34,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7884 transitions. [2022-07-19 21:18:34,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:34,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7884 transitions. [2022-07-19 21:18:34,177 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) [2022-07-19 21:18:34,182 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) [2022-07-19 21:18:34,183 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) [2022-07-19 21:18:34,183 INFO L186 Difference]: Start difference. First operand has 340 places, 306 transitions, 796 flow. Second operand 27 states and 7884 transitions. [2022-07-19 21:18:34,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 311 transitions, 942 flow [2022-07-19 21:18:34,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 311 transitions, 888 flow, removed 7 selfloop flow, removed 13 redundant places. [2022-07-19 21:18:34,188 INFO L242 Difference]: Finished difference. Result has 341 places, 297 transitions, 781 flow [2022-07-19 21:18:34,188 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} [2022-07-19 21:18:34,188 INFO L279 CegarLoopForPetriNet]: 324 programPoint places, 17 predicate places. [2022-07-19 21:18:34,189 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 297 transitions, 781 flow [2022-07-19 21:18:34,190 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) [2022-07-19 21:18:34,190 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:34,190 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] [2022-07-19 21:18:34,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:34,407 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 [2022-07-19 21:18:34,408 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:34,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:34,408 INFO L85 PathProgramCache]: Analyzing trace with hash -2097645159, now seen corresponding path program 1 times [2022-07-19 21:18:34,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:34,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244845139] [2022-07-19 21:18:34,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:34,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:34,441 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:34,466 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:34,466 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:34,466 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:34,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:34,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-19 21:18:34,467 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 21:18:34,467 WARN L231 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:34,467 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-07-19 21:18:34,495 INFO L135 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2022-07-19 21:18:34,497 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 354 places, 403 transitions, 950 flow [2022-07-19 21:18:36,544 INFO L129 PetriNetUnfolder]: 2408/10140 cut-off events. [2022-07-19 21:18:36,544 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2022-07-19 21:18:36,815 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. [2022-07-19 21:18:36,815 INFO L82 GeneralOperation]: Start removeDead. Operand has 354 places, 403 transitions, 950 flow [2022-07-19 21:18:36,924 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 354 places, 403 transitions, 950 flow [2022-07-19 21:18:36,925 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:36,925 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@28e073db, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7e526556 [2022-07-19 21:18:36,925 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:36,928 INFO L129 PetriNetUnfolder]: 6/96 cut-off events. [2022-07-19 21:18:36,928 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:36,928 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:36,929 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:36,929 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:36,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:36,929 INFO L85 PathProgramCache]: Analyzing trace with hash 239543831, now seen corresponding path program 1 times [2022-07-19 21:18:36,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:36,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581011530] [2022-07-19 21:18:36,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:36,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:36,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:36,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581011530] [2022-07-19 21:18:36,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581011530] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:36,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:36,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:36,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172825874] [2022-07-19 21:18:36,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:36,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:36,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:36,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:36,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:36,947 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 403 [2022-07-19 21:18:36,947 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) [2022-07-19 21:18:36,947 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:36,947 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 403 [2022-07-19 21:18:36,947 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:39,126 INFO L129 PetriNetUnfolder]: 1802/9524 cut-off events. [2022-07-19 21:18:39,127 INFO L130 PetriNetUnfolder]: For 7120/7164 co-relation queries the response was YES. [2022-07-19 21:18:39,239 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. [2022-07-19 21:18:39,245 INFO L132 encePairwiseOnDemand]: 344/403 looper letters, 9 selfloop transitions, 0 changer transitions 29/343 dead transitions. [2022-07-19 21:18:39,245 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 343 transitions, 866 flow [2022-07-19 21:18:39,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:39,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:39,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 727 transitions. [2022-07-19 21:18:39,251 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.901985111662531 [2022-07-19 21:18:39,251 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 727 transitions. [2022-07-19 21:18:39,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 727 transitions. [2022-07-19 21:18:39,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:39,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 727 transitions. [2022-07-19 21:18:39,252 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) [2022-07-19 21:18:39,253 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) [2022-07-19 21:18:39,253 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) [2022-07-19 21:18:39,253 INFO L186 Difference]: Start difference. First operand has 354 places, 403 transitions, 950 flow. Second operand 2 states and 727 transitions. [2022-07-19 21:18:39,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 343 transitions, 866 flow [2022-07-19 21:18:39,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 343 transitions, 866 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:39,259 INFO L242 Difference]: Finished difference. Result has 354 places, 314 transitions, 745 flow [2022-07-19 21:18:39,259 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} [2022-07-19 21:18:39,260 INFO L279 CegarLoopForPetriNet]: 354 programPoint places, 0 predicate places. [2022-07-19 21:18:39,260 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 314 transitions, 745 flow [2022-07-19 21:18:39,260 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) [2022-07-19 21:18:39,260 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:39,260 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:39,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-19 21:18:39,261 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:39,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:39,261 INFO L85 PathProgramCache]: Analyzing trace with hash 368626550, now seen corresponding path program 1 times [2022-07-19 21:18:39,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:39,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492978352] [2022-07-19 21:18:39,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:39,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:39,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:39,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492978352] [2022-07-19 21:18:39,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492978352] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:39,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:39,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:39,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067061351] [2022-07-19 21:18:39,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:39,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:39,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:39,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:39,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:39,277 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 403 [2022-07-19 21:18:39,278 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) [2022-07-19 21:18:39,278 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:39,278 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 403 [2022-07-19 21:18:39,278 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:39,373 INFO L129 PetriNetUnfolder]: 0/486 cut-off events. [2022-07-19 21:18:39,373 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-07-19 21:18:39,374 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. [2022-07-19 21:18:39,375 INFO L132 encePairwiseOnDemand]: 400/403 looper letters, 18 selfloop transitions, 2 changer transitions 0/318 dead transitions. [2022-07-19 21:18:39,375 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 318 transitions, 793 flow [2022-07-19 21:18:39,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:39,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:39,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 975 transitions. [2022-07-19 21:18:39,378 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8064516129032258 [2022-07-19 21:18:39,378 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 975 transitions. [2022-07-19 21:18:39,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 975 transitions. [2022-07-19 21:18:39,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:39,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 975 transitions. [2022-07-19 21:18:39,509 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) [2022-07-19 21:18:39,510 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) [2022-07-19 21:18:39,510 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) [2022-07-19 21:18:39,510 INFO L186 Difference]: Start difference. First operand has 354 places, 314 transitions, 745 flow. Second operand 3 states and 975 transitions. [2022-07-19 21:18:39,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 318 transitions, 793 flow [2022-07-19 21:18:39,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 318 transitions, 721 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:39,515 INFO L242 Difference]: Finished difference. Result has 337 places, 315 transitions, 685 flow [2022-07-19 21:18:39,523 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} [2022-07-19 21:18:39,525 INFO L279 CegarLoopForPetriNet]: 354 programPoint places, -17 predicate places. [2022-07-19 21:18:39,526 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 315 transitions, 685 flow [2022-07-19 21:18:39,526 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) [2022-07-19 21:18:39,526 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:39,526 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:39,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-19 21:18:39,526 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:39,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:39,527 INFO L85 PathProgramCache]: Analyzing trace with hash -559231037, now seen corresponding path program 1 times [2022-07-19 21:18:39,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:39,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313643402] [2022-07-19 21:18:39,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:39,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:39,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:39,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313643402] [2022-07-19 21:18:39,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313643402] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:39,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346759503] [2022-07-19 21:18:39,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:39,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:39,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:39,553 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:39,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 21:18:39,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:39,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:39,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:39,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:39,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:39,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346759503] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:39,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:39,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:39,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166367401] [2022-07-19 21:18:39,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:39,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:39,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:39,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:39,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:39,722 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 403 [2022-07-19 21:18:39,724 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) [2022-07-19 21:18:39,724 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:39,724 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 403 [2022-07-19 21:18:39,724 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:39,846 INFO L129 PetriNetUnfolder]: 0/462 cut-off events. [2022-07-19 21:18:39,846 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-07-19 21:18:39,847 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. [2022-07-19 21:18:39,848 INFO L132 encePairwiseOnDemand]: 397/403 looper letters, 19 selfloop transitions, 9 changer transitions 0/325 dead transitions. [2022-07-19 21:18:39,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 325 transitions, 763 flow [2022-07-19 21:18:39,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:39,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:39,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2883 transitions. [2022-07-19 21:18:39,850 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7948717948717948 [2022-07-19 21:18:39,850 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2883 transitions. [2022-07-19 21:18:39,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2883 transitions. [2022-07-19 21:18:39,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:39,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2883 transitions. [2022-07-19 21:18:39,853 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) [2022-07-19 21:18:39,855 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) [2022-07-19 21:18:39,855 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) [2022-07-19 21:18:39,855 INFO L186 Difference]: Start difference. First operand has 337 places, 315 transitions, 685 flow. Second operand 9 states and 2883 transitions. [2022-07-19 21:18:39,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 325 transitions, 763 flow [2022-07-19 21:18:39,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 325 transitions, 761 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:39,860 INFO L242 Difference]: Finished difference. Result has 347 places, 321 transitions, 733 flow [2022-07-19 21:18:39,860 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} [2022-07-19 21:18:39,860 INFO L279 CegarLoopForPetriNet]: 354 programPoint places, -7 predicate places. [2022-07-19 21:18:39,860 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 321 transitions, 733 flow [2022-07-19 21:18:39,861 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) [2022-07-19 21:18:39,861 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:39,861 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:39,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:40,078 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 [2022-07-19 21:18:40,079 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:40,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:40,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1878015802, now seen corresponding path program 1 times [2022-07-19 21:18:40,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:40,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417301789] [2022-07-19 21:18:40,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:40,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:40,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:40,143 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:40,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:40,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417301789] [2022-07-19 21:18:40,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417301789] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:40,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629747177] [2022-07-19 21:18:40,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:40,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:40,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:40,145 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:40,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 21:18:40,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:40,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:40,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:40,315 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:40,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:40,393 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:40,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629747177] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:40,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:40,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:40,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579781005] [2022-07-19 21:18:40,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:40,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:40,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:40,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:40,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:40,400 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 403 [2022-07-19 21:18:40,406 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) [2022-07-19 21:18:40,406 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:40,406 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 403 [2022-07-19 21:18:40,406 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:40,608 INFO L129 PetriNetUnfolder]: 0/414 cut-off events. [2022-07-19 21:18:40,608 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-19 21:18:40,609 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. [2022-07-19 21:18:40,609 INFO L132 encePairwiseOnDemand]: 397/403 looper letters, 27 selfloop transitions, 21 changer transitions 0/345 dead transitions. [2022-07-19 21:18:40,609 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 345 transitions, 937 flow [2022-07-19 21:18:40,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:18:40,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:18:40,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6709 transitions. [2022-07-19 21:18:40,618 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7927448895190831 [2022-07-19 21:18:40,618 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6709 transitions. [2022-07-19 21:18:40,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6709 transitions. [2022-07-19 21:18:40,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:40,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6709 transitions. [2022-07-19 21:18:40,635 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) [2022-07-19 21:18:40,639 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) [2022-07-19 21:18:40,640 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) [2022-07-19 21:18:40,640 INFO L186 Difference]: Start difference. First operand has 347 places, 321 transitions, 733 flow. Second operand 21 states and 6709 transitions. [2022-07-19 21:18:40,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 345 transitions, 937 flow [2022-07-19 21:18:40,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 345 transitions, 923 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:40,645 INFO L242 Difference]: Finished difference. Result has 371 places, 334 transitions, 857 flow [2022-07-19 21:18:40,645 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} [2022-07-19 21:18:40,646 INFO L279 CegarLoopForPetriNet]: 354 programPoint places, 17 predicate places. [2022-07-19 21:18:40,646 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 334 transitions, 857 flow [2022-07-19 21:18:40,647 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) [2022-07-19 21:18:40,647 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:40,647 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] [2022-07-19 21:18:40,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:40,864 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 [2022-07-19 21:18:40,864 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:40,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:40,865 INFO L85 PathProgramCache]: Analyzing trace with hash -546906980, now seen corresponding path program 1 times [2022-07-19 21:18:40,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:40,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734997006] [2022-07-19 21:18:40,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:40,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:40,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:40,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734997006] [2022-07-19 21:18:40,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734997006] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:40,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125256103] [2022-07-19 21:18:40,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:40,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:40,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:40,999 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:40,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 21:18:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:41,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:18:41,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:41,215 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:41,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:41,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125256103] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:41,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:41,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:18:41,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140894690] [2022-07-19 21:18:41,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:41,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:18:41,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:41,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:18:41,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:18:41,482 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 403 [2022-07-19 21:18:41,492 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) [2022-07-19 21:18:41,493 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:41,493 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 403 [2022-07-19 21:18:41,493 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:41,795 INFO L129 PetriNetUnfolder]: 0/378 cut-off events. [2022-07-19 21:18:41,795 INFO L130 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-07-19 21:18:41,809 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. [2022-07-19 21:18:41,824 INFO L132 encePairwiseOnDemand]: 398/403 looper letters, 30 selfloop transitions, 28 changer transitions 0/344 dead transitions. [2022-07-19 21:18:41,824 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 344 transitions, 1049 flow [2022-07-19 21:18:41,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 21:18:41,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-19 21:18:41,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 9571 transitions. [2022-07-19 21:18:41,830 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.791645988420182 [2022-07-19 21:18:41,830 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 9571 transitions. [2022-07-19 21:18:41,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 9571 transitions. [2022-07-19 21:18:41,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:41,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 9571 transitions. [2022-07-19 21:18:41,841 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) [2022-07-19 21:18:41,848 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) [2022-07-19 21:18:41,848 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) [2022-07-19 21:18:41,848 INFO L186 Difference]: Start difference. First operand has 371 places, 334 transitions, 857 flow. Second operand 30 states and 9571 transitions. [2022-07-19 21:18:41,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 344 transitions, 1049 flow [2022-07-19 21:18:41,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 344 transitions, 989 flow, removed 8 selfloop flow, removed 13 redundant places. [2022-07-19 21:18:41,856 INFO L242 Difference]: Finished difference. Result has 375 places, 328 transitions, 866 flow [2022-07-19 21:18:41,856 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} [2022-07-19 21:18:41,856 INFO L279 CegarLoopForPetriNet]: 354 programPoint places, 21 predicate places. [2022-07-19 21:18:41,856 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 328 transitions, 866 flow [2022-07-19 21:18:41,858 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) [2022-07-19 21:18:41,858 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:41,858 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] [2022-07-19 21:18:41,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:42,075 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 [2022-07-19 21:18:42,075 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:42,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:42,076 INFO L85 PathProgramCache]: Analyzing trace with hash -2085713552, now seen corresponding path program 1 times [2022-07-19 21:18:42,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:42,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286290758] [2022-07-19 21:18:42,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:42,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:42,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:42,160 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:42,196 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:42,196 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:42,196 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:42,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:42,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-19 21:18:42,197 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:18:42,198 WARN L231 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:42,198 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-07-19 21:18:42,228 INFO L135 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-07-19 21:18:42,231 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 384 places, 438 transitions, 1046 flow [2022-07-19 21:18:46,914 INFO L129 PetriNetUnfolder]: 5235/20191 cut-off events. [2022-07-19 21:18:46,915 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2022-07-19 21:18:47,294 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. [2022-07-19 21:18:47,294 INFO L82 GeneralOperation]: Start removeDead. Operand has 384 places, 438 transitions, 1046 flow [2022-07-19 21:18:47,583 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 384 places, 438 transitions, 1046 flow [2022-07-19 21:18:47,583 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:47,584 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@28e073db, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7e526556 [2022-07-19 21:18:47,584 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:47,587 INFO L129 PetriNetUnfolder]: 6/96 cut-off events. [2022-07-19 21:18:47,587 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:47,587 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:47,587 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:47,587 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:47,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:47,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1244445289, now seen corresponding path program 1 times [2022-07-19 21:18:47,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:47,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134417806] [2022-07-19 21:18:47,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:47,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:47,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:47,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:47,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134417806] [2022-07-19 21:18:47,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134417806] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:47,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:47,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:47,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252901129] [2022-07-19 21:18:47,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:47,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:47,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:47,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:47,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:47,603 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 352 out of 438 [2022-07-19 21:18:47,603 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) [2022-07-19 21:18:47,603 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:47,603 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 352 of 438 [2022-07-19 21:18:47,604 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:52,593 INFO L129 PetriNetUnfolder]: 4107/19052 cut-off events. [2022-07-19 21:18:52,594 INFO L130 PetriNetUnfolder]: For 15634/15684 co-relation queries the response was YES. [2022-07-19 21:18:52,917 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. [2022-07-19 21:18:52,924 INFO L132 encePairwiseOnDemand]: 373/438 looper letters, 10 selfloop transitions, 0 changer transitions 30/372 dead transitions. [2022-07-19 21:18:52,924 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 372 transitions, 954 flow [2022-07-19 21:18:52,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:52,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:52,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 789 transitions. [2022-07-19 21:18:52,925 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9006849315068494 [2022-07-19 21:18:52,926 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 789 transitions. [2022-07-19 21:18:52,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 789 transitions. [2022-07-19 21:18:52,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:52,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 789 transitions. [2022-07-19 21:18:52,927 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) [2022-07-19 21:18:52,931 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) [2022-07-19 21:18:52,931 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) [2022-07-19 21:18:52,931 INFO L186 Difference]: Start difference. First operand has 384 places, 438 transitions, 1046 flow. Second operand 2 states and 789 transitions. [2022-07-19 21:18:52,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 372 transitions, 954 flow [2022-07-19 21:18:52,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 372 transitions, 954 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:52,950 INFO L242 Difference]: Finished difference. Result has 384 places, 342 transitions, 824 flow [2022-07-19 21:18:52,951 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} [2022-07-19 21:18:52,951 INFO L279 CegarLoopForPetriNet]: 384 programPoint places, 0 predicate places. [2022-07-19 21:18:52,951 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 342 transitions, 824 flow [2022-07-19 21:18:52,952 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) [2022-07-19 21:18:52,952 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:52,955 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:52,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-19 21:18:52,956 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:52,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:52,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1115362570, now seen corresponding path program 1 times [2022-07-19 21:18:52,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:52,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674083504] [2022-07-19 21:18:52,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:52,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:53,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:53,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674083504] [2022-07-19 21:18:53,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674083504] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:53,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:53,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:53,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766198210] [2022-07-19 21:18:53,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:53,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:53,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:53,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:53,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:53,012 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 345 out of 438 [2022-07-19 21:18:53,012 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) [2022-07-19 21:18:53,012 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:53,012 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 345 of 438 [2022-07-19 21:18:53,012 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:53,108 INFO L129 PetriNetUnfolder]: 0/535 cut-off events. [2022-07-19 21:18:53,109 INFO L130 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-07-19 21:18:53,109 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. [2022-07-19 21:18:53,110 INFO L132 encePairwiseOnDemand]: 435/438 looper letters, 19 selfloop transitions, 2 changer transitions 0/346 dead transitions. [2022-07-19 21:18:53,110 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 346 transitions, 874 flow [2022-07-19 21:18:53,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:53,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:53,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1057 transitions. [2022-07-19 21:18:53,111 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.80441400304414 [2022-07-19 21:18:53,111 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1057 transitions. [2022-07-19 21:18:53,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1057 transitions. [2022-07-19 21:18:53,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:53,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1057 transitions. [2022-07-19 21:18:53,112 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) [2022-07-19 21:18:53,113 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) [2022-07-19 21:18:53,114 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) [2022-07-19 21:18:53,114 INFO L186 Difference]: Start difference. First operand has 384 places, 342 transitions, 824 flow. Second operand 3 states and 1057 transitions. [2022-07-19 21:18:53,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 346 transitions, 874 flow [2022-07-19 21:18:53,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 346 transitions, 784 flow, removed 45 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:53,118 INFO L242 Difference]: Finished difference. Result has 367 places, 343 transitions, 746 flow [2022-07-19 21:18:53,119 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} [2022-07-19 21:18:53,119 INFO L279 CegarLoopForPetriNet]: 384 programPoint places, -17 predicate places. [2022-07-19 21:18:53,119 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 343 transitions, 746 flow [2022-07-19 21:18:53,119 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) [2022-07-19 21:18:53,119 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:53,120 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:53,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-07-19 21:18:53,120 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:53,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:53,120 INFO L85 PathProgramCache]: Analyzing trace with hash -431888638, now seen corresponding path program 1 times [2022-07-19 21:18:53,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:53,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383939845] [2022-07-19 21:18:53,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:53,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:53,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:53,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:53,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383939845] [2022-07-19 21:18:53,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383939845] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:53,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738315565] [2022-07-19 21:18:53,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:53,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:53,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:53,144 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:53,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 21:18:53,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:53,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:53,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:53,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:53,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:53,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738315565] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:53,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:53,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:53,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825357895] [2022-07-19 21:18:53,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:53,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:53,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:53,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:53,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:53,329 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 438 [2022-07-19 21:18:53,330 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) [2022-07-19 21:18:53,330 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:53,330 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 438 [2022-07-19 21:18:53,331 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:53,461 INFO L129 PetriNetUnfolder]: 0/511 cut-off events. [2022-07-19 21:18:53,462 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-19 21:18:53,462 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. [2022-07-19 21:18:53,463 INFO L132 encePairwiseOnDemand]: 432/438 looper letters, 20 selfloop transitions, 9 changer transitions 0/353 dead transitions. [2022-07-19 21:18:53,463 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 353 transitions, 826 flow [2022-07-19 21:18:53,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:53,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:53,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3127 transitions. [2022-07-19 21:18:53,465 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7932521562658549 [2022-07-19 21:18:53,465 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3127 transitions. [2022-07-19 21:18:53,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3127 transitions. [2022-07-19 21:18:53,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:53,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3127 transitions. [2022-07-19 21:18:53,468 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) [2022-07-19 21:18:53,470 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) [2022-07-19 21:18:53,470 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) [2022-07-19 21:18:53,470 INFO L186 Difference]: Start difference. First operand has 367 places, 343 transitions, 746 flow. Second operand 9 states and 3127 transitions. [2022-07-19 21:18:53,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 353 transitions, 826 flow [2022-07-19 21:18:53,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 353 transitions, 824 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:53,474 INFO L242 Difference]: Finished difference. Result has 377 places, 349 transitions, 794 flow [2022-07-19 21:18:53,475 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} [2022-07-19 21:18:53,475 INFO L279 CegarLoopForPetriNet]: 384 programPoint places, -7 predicate places. [2022-07-19 21:18:53,475 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 349 transitions, 794 flow [2022-07-19 21:18:53,476 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) [2022-07-19 21:18:53,476 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:53,476 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:53,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-19 21:18:53,717 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 [2022-07-19 21:18:53,717 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:53,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:53,717 INFO L85 PathProgramCache]: Analyzing trace with hash -2076996169, now seen corresponding path program 1 times [2022-07-19 21:18:53,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:53,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184673963] [2022-07-19 21:18:53,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:53,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:53,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:53,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184673963] [2022-07-19 21:18:53,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184673963] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:53,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776724204] [2022-07-19 21:18:53,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:53,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:53,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:53,792 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:53,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 21:18:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:53,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:53,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:53,967 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:53,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:54,043 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:54,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776724204] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:54,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:54,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:54,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699275241] [2022-07-19 21:18:54,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:54,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:54,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:54,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:54,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:54,047 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 438 [2022-07-19 21:18:54,049 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) [2022-07-19 21:18:54,049 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:54,049 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 438 [2022-07-19 21:18:54,049 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:54,266 INFO L129 PetriNetUnfolder]: 0/463 cut-off events. [2022-07-19 21:18:54,266 INFO L130 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-07-19 21:18:54,266 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. [2022-07-19 21:18:54,267 INFO L132 encePairwiseOnDemand]: 432/438 looper letters, 28 selfloop transitions, 21 changer transitions 0/373 dead transitions. [2022-07-19 21:18:54,267 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 373 transitions, 1000 flow [2022-07-19 21:18:54,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:18:54,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:18:54,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7277 transitions. [2022-07-19 21:18:54,271 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7911502500543597 [2022-07-19 21:18:54,271 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7277 transitions. [2022-07-19 21:18:54,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7277 transitions. [2022-07-19 21:18:54,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:54,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7277 transitions. [2022-07-19 21:18:54,277 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) [2022-07-19 21:18:54,281 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) [2022-07-19 21:18:54,282 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) [2022-07-19 21:18:54,282 INFO L186 Difference]: Start difference. First operand has 377 places, 349 transitions, 794 flow. Second operand 21 states and 7277 transitions. [2022-07-19 21:18:54,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 373 transitions, 1000 flow [2022-07-19 21:18:54,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 373 transitions, 986 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:54,287 INFO L242 Difference]: Finished difference. Result has 401 places, 362 transitions, 918 flow [2022-07-19 21:18:54,288 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} [2022-07-19 21:18:54,288 INFO L279 CegarLoopForPetriNet]: 384 programPoint places, 17 predicate places. [2022-07-19 21:18:54,288 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 362 transitions, 918 flow [2022-07-19 21:18:54,289 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) [2022-07-19 21:18:54,289 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:54,289 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] [2022-07-19 21:18:54,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:54,505 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 [2022-07-19 21:18:54,506 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:54,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:54,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1154742421, now seen corresponding path program 1 times [2022-07-19 21:18:54,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:54,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830256331] [2022-07-19 21:18:54,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:54,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:54,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:54,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:54,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830256331] [2022-07-19 21:18:54,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830256331] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:54,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998370846] [2022-07-19 21:18:54,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:54,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:54,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:54,632 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:54,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 21:18:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:54,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:18:54,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:55,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:55,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998370846] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:55,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:55,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:18:55,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033870509] [2022-07-19 21:18:55,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:55,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:18:55,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:55,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:18:55,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:18:55,280 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 438 [2022-07-19 21:18:55,285 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) [2022-07-19 21:18:55,285 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:55,286 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 438 [2022-07-19 21:18:55,286 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:55,645 INFO L129 PetriNetUnfolder]: 0/415 cut-off events. [2022-07-19 21:18:55,645 INFO L130 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-07-19 21:18:55,645 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. [2022-07-19 21:18:55,646 INFO L132 encePairwiseOnDemand]: 433/438 looper letters, 33 selfloop transitions, 31 changer transitions 0/377 dead transitions. [2022-07-19 21:18:55,646 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 377 transitions, 1156 flow [2022-07-19 21:18:55,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-19 21:18:55,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-19 21:18:55,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 11420 transitions. [2022-07-19 21:18:55,654 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7900927079009271 [2022-07-19 21:18:55,654 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 11420 transitions. [2022-07-19 21:18:55,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 11420 transitions. [2022-07-19 21:18:55,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:55,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 11420 transitions. [2022-07-19 21:18:55,665 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) [2022-07-19 21:18:55,676 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) [2022-07-19 21:18:55,677 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) [2022-07-19 21:18:55,677 INFO L186 Difference]: Start difference. First operand has 401 places, 362 transitions, 918 flow. Second operand 33 states and 11420 transitions. [2022-07-19 21:18:55,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 377 transitions, 1156 flow [2022-07-19 21:18:55,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 377 transitions, 1090 flow, removed 9 selfloop flow, removed 13 redundant places. [2022-07-19 21:18:55,684 INFO L242 Difference]: Finished difference. Result has 408 places, 359 transitions, 951 flow [2022-07-19 21:18:55,684 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} [2022-07-19 21:18:55,685 INFO L279 CegarLoopForPetriNet]: 384 programPoint places, 24 predicate places. [2022-07-19 21:18:55,685 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 359 transitions, 951 flow [2022-07-19 21:18:55,686 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) [2022-07-19 21:18:55,686 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:55,687 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] [2022-07-19 21:18:55,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:55,905 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 [2022-07-19 21:18:55,906 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:55,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:55,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1867509715, now seen corresponding path program 1 times [2022-07-19 21:18:55,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:55,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988063285] [2022-07-19 21:18:55,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:55,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:55,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:55,932 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:55,954 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:55,955 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:55,955 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:55,956 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:55,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-19 21:18:55,956 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:18:55,956 WARN L231 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:55,956 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2022-07-19 21:18:55,996 INFO L135 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2022-07-19 21:18:56,001 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 414 places, 473 transitions, 1144 flow [2022-07-19 21:19:06,025 INFO L129 PetriNetUnfolder]: 11390/40738 cut-off events. [2022-07-19 21:19:06,025 INFO L130 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2022-07-19 21:19:08,402 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. [2022-07-19 21:19:08,403 INFO L82 GeneralOperation]: Start removeDead. Operand has 414 places, 473 transitions, 1144 flow [2022-07-19 21:19:09,348 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 414 places, 473 transitions, 1144 flow [2022-07-19 21:19:09,348 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:19:09,349 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@28e073db, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7e526556 [2022-07-19 21:19:09,349 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:19:09,352 INFO L129 PetriNetUnfolder]: 3/87 cut-off events. [2022-07-19 21:19:09,352 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:19:09,352 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:09,352 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:09,352 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:09,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:09,353 INFO L85 PathProgramCache]: Analyzing trace with hash -2111578409, now seen corresponding path program 1 times [2022-07-19 21:19:09,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:09,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301019640] [2022-07-19 21:19:09,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:09,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:09,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:09,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:09,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:09,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301019640] [2022-07-19 21:19:09,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301019640] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:09,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:09,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:19:09,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591676351] [2022-07-19 21:19:09,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:09,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:19:09,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:09,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:19:09,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:19:09,365 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 379 out of 473 [2022-07-19 21:19:09,365 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) [2022-07-19 21:19:09,365 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:09,366 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 379 of 473 [2022-07-19 21:19:09,366 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand