./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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_41-trylock_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 af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:16:57,578 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:16:57,580 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:16:57,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:16:57,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:16:57,609 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:16:57,612 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:16:57,616 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:16:57,617 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:16:57,620 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:16:57,621 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:16:57,622 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:16:57,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:16:57,624 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:16:57,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:16:57,627 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:16:57,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:16:57,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:16:57,631 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:16:57,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:16:57,636 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:16:57,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:16:57,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:16:57,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:16:57,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:16:57,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:16:57,644 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:16:57,644 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:16:57,645 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:16:57,645 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:16:57,646 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:16:57,646 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:16:57,647 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:16:57,648 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:16:57,648 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:16:57,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:16:57,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:16:57,649 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:16:57,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:16:57,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:16:57,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:16:57,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:16:57,652 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:16:57,675 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:16:57,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:16:57,676 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:16:57,676 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:16:57,677 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:16:57,677 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:16:57,677 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:16:57,677 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:16:57,677 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:16:57,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:16:57,678 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:16:57,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:16:57,679 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:16:57,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:16:57,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:16:57,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:16:57,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:16:57,679 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:16:57,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:16:57,680 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:16:57,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:16:57,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:16:57,680 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:16:57,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:16:57,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:16:57,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:16:57,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:16:57,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:16:57,681 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:16:57,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:16:57,681 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:16:57,682 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:16:57,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:16:57,682 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 [2022-07-12 10:16:57,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:16:57,855 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:16:57,857 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:16:57,857 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:16:57,857 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:16:57,858 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i [2022-07-12 10:16:57,900 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b718605dd/e95b74a2940a4b3bb647b5d4568ea7fc/FLAGfa7fe74e8 [2022-07-12 10:16:58,289 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:16:58,289 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i [2022-07-12 10:16:58,303 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b718605dd/e95b74a2940a4b3bb647b5d4568ea7fc/FLAGfa7fe74e8 [2022-07-12 10:16:58,651 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b718605dd/e95b74a2940a4b3bb647b5d4568ea7fc [2022-07-12 10:16:58,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:16:58,654 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:16:58,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:16:58,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:16:58,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:16:58,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:16:58" (1/1) ... [2022-07-12 10:16:58,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@338b3127 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:58, skipping insertion in model container [2022-07-12 10:16:58,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:16:58" (1/1) ... [2022-07-12 10:16:58,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:16:58,693 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:16:58,925 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_41-trylock_racefree.i[30176,30189] [2022-07-12 10:16:58,943 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:16:58,952 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:16:58,982 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_41-trylock_racefree.i[30176,30189] [2022-07-12 10:16:58,997 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:16:59,022 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:16:59,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:59 WrapperNode [2022-07-12 10:16:59,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:16:59,024 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:16:59,024 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:16:59,024 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:16:59,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:59" (1/1) ... [2022-07-12 10:16:59,037 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:59" (1/1) ... [2022-07-12 10:16:59,051 INFO L137 Inliner]: procedures = 171, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2022-07-12 10:16:59,051 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:16:59,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:16:59,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:16:59,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:16:59,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:59" (1/1) ... [2022-07-12 10:16:59,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:59" (1/1) ... [2022-07-12 10:16:59,059 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:59" (1/1) ... [2022-07-12 10:16:59,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:59" (1/1) ... [2022-07-12 10:16:59,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:59" (1/1) ... [2022-07-12 10:16:59,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:59" (1/1) ... [2022-07-12 10:16:59,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:59" (1/1) ... [2022-07-12 10:16:59,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:16:59,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:16:59,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:16:59,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:16:59,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:59" (1/1) ... [2022-07-12 10:16:59,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:16:59,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:59,094 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) [2022-07-12 10:16:59,096 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 [2022-07-12 10:16:59,120 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:16:59,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:16:59,121 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-12 10:16:59,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:16:59,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:16:59,121 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-12 10:16:59,124 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-12 10:16:59,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:16:59,124 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2022-07-12 10:16:59,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:16:59,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:16:59,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:16:59,125 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:16:59,191 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:16:59,193 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:16:59,319 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:16:59,324 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:16:59,324 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-07-12 10:16:59,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:16:59 BoogieIcfgContainer [2022-07-12 10:16:59,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:16:59,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:16:59,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:16:59,329 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:16:59,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:16:58" (1/3) ... [2022-07-12 10:16:59,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f478481 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:16:59, skipping insertion in model container [2022-07-12 10:16:59,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:59" (2/3) ... [2022-07-12 10:16:59,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f478481 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:16:59, skipping insertion in model container [2022-07-12 10:16:59,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:16:59" (3/3) ... [2022-07-12 10:16:59,331 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_41-trylock_racefree.i [2022-07-12 10:16:59,334 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:16:59,340 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:16:59,341 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:16:59,341 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:16:59,403 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-12 10:16:59,430 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 98 places, 109 transitions, 226 flow [2022-07-12 10:16:59,466 INFO L129 PetriNetUnfolder]: 21/149 cut-off events. [2022-07-12 10:16:59,466 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:16:59,473 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 149 events. 21/149 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 370 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 73. Up to 6 conditions per place. [2022-07-12 10:16:59,474 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 109 transitions, 226 flow [2022-07-12 10:16:59,478 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 104 transitions, 213 flow [2022-07-12 10:16:59,486 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:59,490 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@53aafc55, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1308898f [2022-07-12 10:16:59,490 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:59,501 INFO L129 PetriNetUnfolder]: 5/75 cut-off events. [2022-07-12 10:16:59,504 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:59,504 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:59,505 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:59,505 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:59,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:59,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1705821278, now seen corresponding path program 1 times [2022-07-12 10:16:59,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:59,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835591617] [2022-07-12 10:16:59,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:59,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:59,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:59,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835591617] [2022-07-12 10:16:59,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835591617] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:59,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:59,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:59,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793308119] [2022-07-12 10:16:59,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:59,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:59,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:59,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:59,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:59,708 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 109 [2022-07-12 10:16:59,710 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 104 transitions, 213 flow. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:59,710 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:59,710 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 109 [2022-07-12 10:16:59,711 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:59,739 INFO L129 PetriNetUnfolder]: 1/95 cut-off events. [2022-07-12 10:16:59,740 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:59,740 INFO L84 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 95 events. 1/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 0 based on Foata normal form. 23/114 useless extension candidates. Maximal degree in co-relation 65. Up to 6 conditions per place. [2022-07-12 10:16:59,741 INFO L132 encePairwiseOnDemand]: 94/109 looper letters, 8 selfloop transitions, 2 changer transitions 15/93 dead transitions. [2022-07-12 10:16:59,742 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 93 transitions, 211 flow [2022-07-12 10:16:59,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:59,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:59,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 291 transitions. [2022-07-12 10:16:59,751 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8899082568807339 [2022-07-12 10:16:59,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 291 transitions. [2022-07-12 10:16:59,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 291 transitions. [2022-07-12 10:16:59,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:59,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 291 transitions. [2022-07-12 10:16:59,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:59,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:59,761 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:59,762 INFO L186 Difference]: Start difference. First operand has 94 places, 104 transitions, 213 flow. Second operand 3 states and 291 transitions. [2022-07-12 10:16:59,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 93 transitions, 211 flow [2022-07-12 10:16:59,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 93 transitions, 211 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:59,767 INFO L242 Difference]: Finished difference. Result has 96 places, 76 transitions, 165 flow [2022-07-12 10:16:59,768 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=96, PETRI_TRANSITIONS=76} [2022-07-12 10:16:59,770 INFO L279 CegarLoopForPetriNet]: 94 programPoint places, 2 predicate places. [2022-07-12 10:16:59,771 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 76 transitions, 165 flow [2022-07-12 10:16:59,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:59,771 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:59,771 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] [2022-07-12 10:16:59,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:16:59,772 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:59,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:59,772 INFO L85 PathProgramCache]: Analyzing trace with hash 43909355, now seen corresponding path program 1 times [2022-07-12 10:16:59,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:59,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581666485] [2022-07-12 10:16:59,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:59,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:59,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:59,801 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:59,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:59,831 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:59,832 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:59,833 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:59,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:59,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:16:59,835 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-12 10:16:59,836 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:59,836 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-12 10:16:59,851 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-12 10:16:59,854 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 123 places, 139 transitions, 296 flow [2022-07-12 10:16:59,881 INFO L129 PetriNetUnfolder]: 37/244 cut-off events. [2022-07-12 10:16:59,881 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-12 10:16:59,883 INFO L84 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 244 events. 37/244 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 724 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 151. Up to 9 conditions per place. [2022-07-12 10:16:59,883 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 139 transitions, 296 flow [2022-07-12 10:16:59,885 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 139 transitions, 296 flow [2022-07-12 10:16:59,886 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:59,887 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@53aafc55, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1308898f [2022-07-12 10:16:59,887 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:59,894 INFO L129 PetriNetUnfolder]: 6/77 cut-off events. [2022-07-12 10:16:59,894 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:59,894 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:59,894 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] [2022-07-12 10:16:59,895 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:59,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:59,895 INFO L85 PathProgramCache]: Analyzing trace with hash -398457143, now seen corresponding path program 1 times [2022-07-12 10:16:59,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:59,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902273837] [2022-07-12 10:16:59,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:59,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:59,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:59,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:59,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902273837] [2022-07-12 10:16:59,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902273837] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:59,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:59,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:59,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827842642] [2022-07-12 10:16:59,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:59,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:59,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:59,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:59,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:59,938 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 139 [2022-07-12 10:16:59,938 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 139 transitions, 296 flow. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:59,938 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:59,938 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 139 [2022-07-12 10:16:59,938 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:59,973 INFO L129 PetriNetUnfolder]: 4/190 cut-off events. [2022-07-12 10:16:59,973 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-07-12 10:16:59,974 INFO L84 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 190 events. 4/190 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 421 event pairs, 0 based on Foata normal form. 80/260 useless extension candidates. Maximal degree in co-relation 123. Up to 16 conditions per place. [2022-07-12 10:16:59,975 INFO L132 encePairwiseOnDemand]: 118/139 looper letters, 11 selfloop transitions, 2 changer transitions 21/124 dead transitions. [2022-07-12 10:16:59,975 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 124 transitions, 296 flow [2022-07-12 10:16:59,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:59,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:59,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 368 transitions. [2022-07-12 10:16:59,977 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.882494004796163 [2022-07-12 10:16:59,977 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 368 transitions. [2022-07-12 10:16:59,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 368 transitions. [2022-07-12 10:16:59,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:59,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 368 transitions. [2022-07-12 10:16:59,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:59,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:59,981 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:59,981 INFO L186 Difference]: Start difference. First operand has 123 places, 139 transitions, 296 flow. Second operand 3 states and 368 transitions. [2022-07-12 10:16:59,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 124 transitions, 296 flow [2022-07-12 10:16:59,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 124 transitions, 296 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:59,984 INFO L242 Difference]: Finished difference. Result has 125 places, 100 transitions, 222 flow [2022-07-12 10:16:59,984 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=125, PETRI_TRANSITIONS=100} [2022-07-12 10:16:59,985 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 2 predicate places. [2022-07-12 10:16:59,985 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 100 transitions, 222 flow [2022-07-12 10:16:59,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:59,986 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:59,986 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] [2022-07-12 10:16:59,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:16:59,986 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:59,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:59,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1351761021, now seen corresponding path program 1 times [2022-07-12 10:16:59,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:59,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248881156] [2022-07-12 10:16:59,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:59,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:00,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:00,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248881156] [2022-07-12 10:17:00,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248881156] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:00,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010351616] [2022-07-12 10:17:00,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:00,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:00,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:00,049 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) [2022-07-12 10:17:00,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:17:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:00,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:00,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:00,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:00,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:00,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010351616] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:00,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:00,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:00,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797306841] [2022-07-12 10:17:00,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:00,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:00,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:00,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:00,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:00,262 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 139 [2022-07-12 10:17:00,265 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 100 transitions, 222 flow. Second operand has 10 states, 10 states have (on average 110.3) internal successors, (1103), 10 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,265 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:00,265 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 139 [2022-07-12 10:17:00,265 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:00,327 INFO L129 PetriNetUnfolder]: 0/98 cut-off events. [2022-07-12 10:17:00,327 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-12 10:17:00,328 INFO L84 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 98 events. 0/98 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 2/100 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-07-12 10:17:00,330 INFO L132 encePairwiseOnDemand]: 134/139 looper letters, 9 selfloop transitions, 7 changer transitions 0/92 dead transitions. [2022-07-12 10:17:00,330 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 92 transitions, 236 flow [2022-07-12 10:17:00,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:00,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:00,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 990 transitions. [2022-07-12 10:17:00,335 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7913669064748201 [2022-07-12 10:17:00,335 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 990 transitions. [2022-07-12 10:17:00,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 990 transitions. [2022-07-12 10:17:00,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:00,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 990 transitions. [2022-07-12 10:17:00,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 110.0) internal successors, (990), 9 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 139.0) internal successors, (1390), 10 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,341 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 139.0) internal successors, (1390), 10 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,341 INFO L186 Difference]: Start difference. First operand has 125 places, 100 transitions, 222 flow. Second operand 9 states and 990 transitions. [2022-07-12 10:17:00,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 92 transitions, 236 flow [2022-07-12 10:17:00,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 92 transitions, 232 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:00,346 INFO L242 Difference]: Finished difference. Result has 100 places, 88 transitions, 206 flow [2022-07-12 10:17:00,346 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=206, PETRI_PLACES=100, PETRI_TRANSITIONS=88} [2022-07-12 10:17:00,348 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, -23 predicate places. [2022-07-12 10:17:00,348 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 88 transitions, 206 flow [2022-07-12 10:17:00,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 110.3) internal successors, (1103), 10 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,350 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:00,351 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] [2022-07-12 10:17:00,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:00,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:00,573 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:00,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:00,573 INFO L85 PathProgramCache]: Analyzing trace with hash -392863105, now seen corresponding path program 1 times [2022-07-12 10:17:00,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:00,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451161354] [2022-07-12 10:17:00,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:00,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:00,593 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:00,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:00,618 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:00,618 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:00,618 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:00,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:00,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:17:00,619 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-12 10:17:00,620 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:00,620 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-12 10:17:00,637 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-12 10:17:00,642 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 148 places, 169 transitions, 368 flow [2022-07-12 10:17:00,672 INFO L129 PetriNetUnfolder]: 58/372 cut-off events. [2022-07-12 10:17:00,672 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-12 10:17:00,674 INFO L84 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 372 events. 58/372 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1231 event pairs, 1 based on Foata normal form. 0/306 useless extension candidates. Maximal degree in co-relation 252. Up to 16 conditions per place. [2022-07-12 10:17:00,674 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 169 transitions, 368 flow [2022-07-12 10:17:00,676 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 169 transitions, 368 flow [2022-07-12 10:17:00,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:00,678 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@53aafc55, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1308898f [2022-07-12 10:17:00,678 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:00,681 INFO L129 PetriNetUnfolder]: 4/71 cut-off events. [2022-07-12 10:17:00,681 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:00,682 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:00,682 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] [2022-07-12 10:17:00,682 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:00,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:00,682 INFO L85 PathProgramCache]: Analyzing trace with hash -844642061, now seen corresponding path program 1 times [2022-07-12 10:17:00,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:00,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817934288] [2022-07-12 10:17:00,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:00,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:00,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:00,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:00,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817934288] [2022-07-12 10:17:00,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817934288] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:00,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:00,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:17:00,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590264912] [2022-07-12 10:17:00,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:00,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:17:00,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:00,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:17:00,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:17:00,700 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 169 [2022-07-12 10:17:00,701 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 169 transitions, 368 flow. Second operand has 2 states, 2 states have (on average 139.0) internal successors, (278), 2 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,701 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:00,701 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 169 [2022-07-12 10:17:00,701 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:00,734 INFO L129 PetriNetUnfolder]: 12/322 cut-off events. [2022-07-12 10:17:00,735 INFO L130 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-07-12 10:17:00,736 INFO L84 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 322 events. 12/322 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1016 event pairs, 1 based on Foata normal form. 110/412 useless extension candidates. Maximal degree in co-relation 224. Up to 16 conditions per place. [2022-07-12 10:17:00,737 INFO L132 encePairwiseOnDemand]: 145/169 looper letters, 3 selfloop transitions, 0 changer transitions 22/144 dead transitions. [2022-07-12 10:17:00,737 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 144 transitions, 330 flow [2022-07-12 10:17:00,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:17:00,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:17:00,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 306 transitions. [2022-07-12 10:17:00,738 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9053254437869822 [2022-07-12 10:17:00,738 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 306 transitions. [2022-07-12 10:17:00,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 306 transitions. [2022-07-12 10:17:00,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:00,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 306 transitions. [2022-07-12 10:17:00,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 153.0) internal successors, (306), 2 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,741 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,741 INFO L186 Difference]: Start difference. First operand has 148 places, 169 transitions, 368 flow. Second operand 2 states and 306 transitions. [2022-07-12 10:17:00,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 144 transitions, 330 flow [2022-07-12 10:17:00,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 144 transitions, 330 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:00,746 INFO L242 Difference]: Finished difference. Result has 148 places, 122 transitions, 265 flow [2022-07-12 10:17:00,746 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=265, PETRI_PLACES=148, PETRI_TRANSITIONS=122} [2022-07-12 10:17:00,748 INFO L279 CegarLoopForPetriNet]: 148 programPoint places, 0 predicate places. [2022-07-12 10:17:00,748 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 122 transitions, 265 flow [2022-07-12 10:17:00,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 139.0) internal successors, (278), 2 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,748 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:00,748 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] [2022-07-12 10:17:00,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:17:00,749 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:00,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:00,749 INFO L85 PathProgramCache]: Analyzing trace with hash 2085235745, now seen corresponding path program 1 times [2022-07-12 10:17:00,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:00,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439269543] [2022-07-12 10:17:00,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:00,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:00,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:00,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:00,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439269543] [2022-07-12 10:17:00,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439269543] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:00,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:00,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:00,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167249262] [2022-07-12 10:17:00,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:00,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:00,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:00,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:00,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:00,796 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 169 [2022-07-12 10:17:00,796 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 122 transitions, 265 flow. Second operand has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,796 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:00,796 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 169 [2022-07-12 10:17:00,797 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:00,825 INFO L129 PetriNetUnfolder]: 3/172 cut-off events. [2022-07-12 10:17:00,825 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:17:00,826 INFO L84 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 172 events. 3/172 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 365 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 206. Up to 18 conditions per place. [2022-07-12 10:17:00,827 INFO L132 encePairwiseOnDemand]: 166/169 looper letters, 12 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2022-07-12 10:17:00,827 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 126 transitions, 301 flow [2022-07-12 10:17:00,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:00,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:00,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 408 transitions. [2022-07-12 10:17:00,829 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8047337278106509 [2022-07-12 10:17:00,829 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 408 transitions. [2022-07-12 10:17:00,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 408 transitions. [2022-07-12 10:17:00,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:00,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 408 transitions. [2022-07-12 10:17:00,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,836 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,836 INFO L186 Difference]: Start difference. First operand has 148 places, 122 transitions, 265 flow. Second operand 3 states and 408 transitions. [2022-07-12 10:17:00,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 126 transitions, 301 flow [2022-07-12 10:17:00,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 126 transitions, 295 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:00,839 INFO L242 Difference]: Finished difference. Result has 132 places, 123 transitions, 271 flow [2022-07-12 10:17:00,839 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=271, PETRI_PLACES=132, PETRI_TRANSITIONS=123} [2022-07-12 10:17:00,840 INFO L279 CegarLoopForPetriNet]: 148 programPoint places, -16 predicate places. [2022-07-12 10:17:00,840 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 123 transitions, 271 flow [2022-07-12 10:17:00,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,841 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:00,841 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] [2022-07-12 10:17:00,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:17:00,841 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:00,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:00,842 INFO L85 PathProgramCache]: Analyzing trace with hash -185774998, now seen corresponding path program 1 times [2022-07-12 10:17:00,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:00,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214451551] [2022-07-12 10:17:00,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:00,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:00,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:00,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:00,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214451551] [2022-07-12 10:17:00,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214451551] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:00,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232551722] [2022-07-12 10:17:00,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:00,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:00,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:00,894 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) [2022-07-12 10:17:00,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:17:00,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:00,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:00,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:00,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:00,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:01,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:01,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232551722] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:01,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:01,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:01,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050532875] [2022-07-12 10:17:01,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:01,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:01,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:01,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:01,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:01,006 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 169 [2022-07-12 10:17:01,007 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 123 transitions, 271 flow. Second operand has 10 states, 10 states have (on average 132.3) internal successors, (1323), 10 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,008 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:01,008 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 169 [2022-07-12 10:17:01,008 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:01,065 INFO L129 PetriNetUnfolder]: 1/144 cut-off events. [2022-07-12 10:17:01,065 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-12 10:17:01,066 INFO L84 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 144 events. 1/144 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 211 event pairs, 0 based on Foata normal form. 2/145 useless extension candidates. Maximal degree in co-relation 182. Up to 7 conditions per place. [2022-07-12 10:17:01,066 INFO L132 encePairwiseOnDemand]: 163/169 looper letters, 13 selfloop transitions, 9 changer transitions 0/133 dead transitions. [2022-07-12 10:17:01,066 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 133 transitions, 337 flow [2022-07-12 10:17:01,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:01,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:01,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1194 transitions. [2022-07-12 10:17:01,069 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7850098619329389 [2022-07-12 10:17:01,069 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1194 transitions. [2022-07-12 10:17:01,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1194 transitions. [2022-07-12 10:17:01,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:01,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1194 transitions. [2022-07-12 10:17:01,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 132.66666666666666) internal successors, (1194), 9 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,074 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,074 INFO L186 Difference]: Start difference. First operand has 132 places, 123 transitions, 271 flow. Second operand 9 states and 1194 transitions. [2022-07-12 10:17:01,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 133 transitions, 337 flow [2022-07-12 10:17:01,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 133 transitions, 335 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:01,076 INFO L242 Difference]: Finished difference. Result has 142 places, 129 transitions, 319 flow [2022-07-12 10:17:01,076 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=319, PETRI_PLACES=142, PETRI_TRANSITIONS=129} [2022-07-12 10:17:01,077 INFO L279 CegarLoopForPetriNet]: 148 programPoint places, -6 predicate places. [2022-07-12 10:17:01,077 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 129 transitions, 319 flow [2022-07-12 10:17:01,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 132.3) internal successors, (1323), 10 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,078 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:01,078 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] [2022-07-12 10:17:01,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:01,287 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,SelfDestructingSolverStorable7 [2022-07-12 10:17:01,288 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:01,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:01,288 INFO L85 PathProgramCache]: Analyzing trace with hash 499831500, now seen corresponding path program 1 times [2022-07-12 10:17:01,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:01,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997309114] [2022-07-12 10:17:01,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:01,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:01,309 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:01,323 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:01,323 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:01,323 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:01,324 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:01,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 10:17:01,324 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-12 10:17:01,324 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:01,324 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-12 10:17:01,338 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-12 10:17:01,340 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 173 places, 199 transitions, 442 flow [2022-07-12 10:17:01,398 INFO L129 PetriNetUnfolder]: 91/568 cut-off events. [2022-07-12 10:17:01,398 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-12 10:17:01,402 INFO L84 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 568 events. 91/568 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2160 event pairs, 6 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 392. Up to 32 conditions per place. [2022-07-12 10:17:01,402 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 199 transitions, 442 flow [2022-07-12 10:17:01,406 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 199 transitions, 442 flow [2022-07-12 10:17:01,407 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:01,407 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@53aafc55, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1308898f [2022-07-12 10:17:01,407 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:01,411 INFO L129 PetriNetUnfolder]: 5/71 cut-off events. [2022-07-12 10:17:01,411 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:01,411 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:01,411 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] [2022-07-12 10:17:01,411 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:01,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:01,412 INFO L85 PathProgramCache]: Analyzing trace with hash -25760486, now seen corresponding path program 1 times [2022-07-12 10:17:01,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:01,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283773387] [2022-07-12 10:17:01,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:01,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:01,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:01,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283773387] [2022-07-12 10:17:01,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283773387] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:01,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:01,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:17:01,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585252757] [2022-07-12 10:17:01,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:01,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:17:01,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:01,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:17:01,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:17:01,443 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 199 [2022-07-12 10:17:01,443 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 199 transitions, 442 flow. Second operand has 2 states, 2 states have (on average 161.0) internal successors, (322), 2 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,443 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:01,443 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 199 [2022-07-12 10:17:01,444 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:01,498 INFO L129 PetriNetUnfolder]: 26/498 cut-off events. [2022-07-12 10:17:01,498 INFO L130 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2022-07-12 10:17:01,500 INFO L84 FinitePrefix]: Finished finitePrefix Result has 590 conditions, 498 events. 26/498 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1961 event pairs, 6 based on Foata normal form. 257/724 useless extension candidates. Maximal degree in co-relation 357. Up to 37 conditions per place. [2022-07-12 10:17:01,501 INFO L132 encePairwiseOnDemand]: 169/199 looper letters, 4 selfloop transitions, 0 changer transitions 23/168 dead transitions. [2022-07-12 10:17:01,501 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 168 transitions, 396 flow [2022-07-12 10:17:01,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:17:01,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:17:01,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 358 transitions. [2022-07-12 10:17:01,502 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8994974874371859 [2022-07-12 10:17:01,502 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 358 transitions. [2022-07-12 10:17:01,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 358 transitions. [2022-07-12 10:17:01,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:01,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 358 transitions. [2022-07-12 10:17:01,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 179.0) internal successors, (358), 2 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,504 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,504 INFO L186 Difference]: Start difference. First operand has 173 places, 199 transitions, 442 flow. Second operand 2 states and 358 transitions. [2022-07-12 10:17:01,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 168 transitions, 396 flow [2022-07-12 10:17:01,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 168 transitions, 396 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:01,507 INFO L242 Difference]: Finished difference. Result has 173 places, 145 transitions, 322 flow [2022-07-12 10:17:01,507 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=322, PETRI_PLACES=173, PETRI_TRANSITIONS=145} [2022-07-12 10:17:01,507 INFO L279 CegarLoopForPetriNet]: 173 programPoint places, 0 predicate places. [2022-07-12 10:17:01,507 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 145 transitions, 322 flow [2022-07-12 10:17:01,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 161.0) internal successors, (322), 2 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,508 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:01,508 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] [2022-07-12 10:17:01,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 10:17:01,508 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:01,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:01,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1243546776, now seen corresponding path program 1 times [2022-07-12 10:17:01,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:01,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450840698] [2022-07-12 10:17:01,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:01,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:01,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:01,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:01,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:01,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450840698] [2022-07-12 10:17:01,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450840698] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:01,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:01,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:01,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486323066] [2022-07-12 10:17:01,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:01,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:01,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:01,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:01,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:01,523 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 199 [2022-07-12 10:17:01,524 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 145 transitions, 322 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,524 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:01,524 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 199 [2022-07-12 10:17:01,524 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:01,568 INFO L129 PetriNetUnfolder]: 4/218 cut-off events. [2022-07-12 10:17:01,568 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-12 10:17:01,569 INFO L84 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 218 events. 4/218 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 521 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 264. Up to 24 conditions per place. [2022-07-12 10:17:01,569 INFO L132 encePairwiseOnDemand]: 196/199 looper letters, 13 selfloop transitions, 2 changer transitions 0/149 dead transitions. [2022-07-12 10:17:01,569 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 149 transitions, 360 flow [2022-07-12 10:17:01,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:01,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:01,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2022-07-12 10:17:01,571 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7956448911222781 [2022-07-12 10:17:01,571 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2022-07-12 10:17:01,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2022-07-12 10:17:01,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:01,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2022-07-12 10:17:01,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,573 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,573 INFO L186 Difference]: Start difference. First operand has 173 places, 145 transitions, 322 flow. Second operand 3 states and 475 transitions. [2022-07-12 10:17:01,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 149 transitions, 360 flow [2022-07-12 10:17:01,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 149 transitions, 348 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:01,575 INFO L242 Difference]: Finished difference. Result has 157 places, 146 transitions, 322 flow [2022-07-12 10:17:01,575 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=322, PETRI_PLACES=157, PETRI_TRANSITIONS=146} [2022-07-12 10:17:01,576 INFO L279 CegarLoopForPetriNet]: 173 programPoint places, -16 predicate places. [2022-07-12 10:17:01,576 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 146 transitions, 322 flow [2022-07-12 10:17:01,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,576 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:01,576 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] [2022-07-12 10:17:01,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 10:17:01,576 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:01,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:01,576 INFO L85 PathProgramCache]: Analyzing trace with hash -954141003, now seen corresponding path program 1 times [2022-07-12 10:17:01,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:01,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384316602] [2022-07-12 10:17:01,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:01,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:01,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:01,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:01,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384316602] [2022-07-12 10:17:01,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384316602] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:01,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410323299] [2022-07-12 10:17:01,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:01,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:01,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:01,603 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) [2022-07-12 10:17:01,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:17:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:01,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:01,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:01,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:01,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:01,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410323299] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:01,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:01,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:01,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359029819] [2022-07-12 10:17:01,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:01,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:01,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:01,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:01,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:01,742 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 199 [2022-07-12 10:17:01,743 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 146 transitions, 322 flow. Second operand has 10 states, 10 states have (on average 154.3) internal successors, (1543), 10 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,743 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:01,743 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 199 [2022-07-12 10:17:01,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:01,809 INFO L129 PetriNetUnfolder]: 2/190 cut-off events. [2022-07-12 10:17:01,810 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-12 10:17:01,810 INFO L84 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 190 events. 2/190 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 367 event pairs, 0 based on Foata normal form. 2/190 useless extension candidates. Maximal degree in co-relation 240. Up to 11 conditions per place. [2022-07-12 10:17:01,811 INFO L132 encePairwiseOnDemand]: 193/199 looper letters, 14 selfloop transitions, 9 changer transitions 0/156 dead transitions. [2022-07-12 10:17:01,811 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 156 transitions, 390 flow [2022-07-12 10:17:01,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:01,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:01,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1393 transitions. [2022-07-12 10:17:01,814 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2022-07-12 10:17:01,814 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1393 transitions. [2022-07-12 10:17:01,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1393 transitions. [2022-07-12 10:17:01,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:01,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1393 transitions. [2022-07-12 10:17:01,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 154.77777777777777) internal successors, (1393), 9 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 199.0) internal successors, (1990), 10 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,821 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 199.0) internal successors, (1990), 10 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,821 INFO L186 Difference]: Start difference. First operand has 157 places, 146 transitions, 322 flow. Second operand 9 states and 1393 transitions. [2022-07-12 10:17:01,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 156 transitions, 390 flow [2022-07-12 10:17:01,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 156 transitions, 388 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:01,824 INFO L242 Difference]: Finished difference. Result has 167 places, 152 transitions, 370 flow [2022-07-12 10:17:01,825 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=370, PETRI_PLACES=167, PETRI_TRANSITIONS=152} [2022-07-12 10:17:01,825 INFO L279 CegarLoopForPetriNet]: 173 programPoint places, -6 predicate places. [2022-07-12 10:17:01,825 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 152 transitions, 370 flow [2022-07-12 10:17:01,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 154.3) internal successors, (1543), 10 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,826 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:01,826 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] [2022-07-12 10:17:01,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-12 10:17:02,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:02,040 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:02,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:02,040 INFO L85 PathProgramCache]: Analyzing trace with hash -770173908, now seen corresponding path program 1 times [2022-07-12 10:17:02,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:02,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810539287] [2022-07-12 10:17:02,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:02,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-12 10:17:02,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:02,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810539287] [2022-07-12 10:17:02,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810539287] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:02,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:02,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:17:02,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850077092] [2022-07-12 10:17:02,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:02,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:17:02,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:02,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:17:02,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:17:02,089 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 199 [2022-07-12 10:17:02,089 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 152 transitions, 370 flow. Second operand has 5 states, 5 states have (on average 139.6) internal successors, (698), 5 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:02,089 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:02,090 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 199 [2022-07-12 10:17:02,090 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:06,089 INFO L129 PetriNetUnfolder]: 16764/41462 cut-off events. [2022-07-12 10:17:06,089 INFO L130 PetriNetUnfolder]: For 555/555 co-relation queries the response was YES. [2022-07-12 10:17:06,237 INFO L84 FinitePrefix]: Finished finitePrefix Result has 64879 conditions, 41462 events. 16764/41462 cut-off events. For 555/555 co-relation queries the response was YES. Maximal size of possible extension queue 1780. Compared 494905 event pairs, 10951 based on Foata normal form. 750/41629 useless extension candidates. Maximal degree in co-relation 64868. Up to 14189 conditions per place. [2022-07-12 10:17:06,350 INFO L132 encePairwiseOnDemand]: 191/199 looper letters, 31 selfloop transitions, 5 changer transitions 53/216 dead transitions. [2022-07-12 10:17:06,350 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 216 transitions, 691 flow [2022-07-12 10:17:06,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:17:06,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:17:06,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1057 transitions. [2022-07-12 10:17:06,353 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7587939698492462 [2022-07-12 10:17:06,353 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1057 transitions. [2022-07-12 10:17:06,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1057 transitions. [2022-07-12 10:17:06,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:06,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1057 transitions. [2022-07-12 10:17:06,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 151.0) internal successors, (1057), 7 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) [2022-07-12 10:17:06,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 199.0) internal successors, (1592), 8 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:06,358 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 199.0) internal successors, (1592), 8 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:06,358 INFO L186 Difference]: Start difference. First operand has 167 places, 152 transitions, 370 flow. Second operand 7 states and 1057 transitions. [2022-07-12 10:17:06,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 216 transitions, 691 flow [2022-07-12 10:17:06,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 216 transitions, 685 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:06,362 INFO L242 Difference]: Finished difference. Result has 177 places, 156 transitions, 421 flow [2022-07-12 10:17:06,363 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=421, PETRI_PLACES=177, PETRI_TRANSITIONS=156} [2022-07-12 10:17:06,364 INFO L279 CegarLoopForPetriNet]: 173 programPoint places, 4 predicate places. [2022-07-12 10:17:06,365 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 156 transitions, 421 flow [2022-07-12 10:17:06,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.6) internal successors, (698), 5 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:06,365 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:06,365 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] [2022-07-12 10:17:06,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 10:17:06,366 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:06,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:06,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1523698642, now seen corresponding path program 1 times [2022-07-12 10:17:06,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:06,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155953719] [2022-07-12 10:17:06,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:06,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:06,391 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:06,421 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:06,421 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:06,422 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:06,422 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:06,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 10:17:06,422 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:17:06,423 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:06,423 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-12 10:17:06,446 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-12 10:17:06,449 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 198 places, 229 transitions, 518 flow [2022-07-12 10:17:06,608 INFO L129 PetriNetUnfolder]: 152/904 cut-off events. [2022-07-12 10:17:06,608 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-12 10:17:06,619 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1015 conditions, 904 events. 152/904 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4125 event pairs, 23 based on Foata normal form. 0/762 useless extension candidates. Maximal degree in co-relation 613. Up to 80 conditions per place. [2022-07-12 10:17:06,619 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 229 transitions, 518 flow [2022-07-12 10:17:06,625 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 229 transitions, 518 flow [2022-07-12 10:17:06,627 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:06,627 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@53aafc55, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1308898f [2022-07-12 10:17:06,628 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:06,632 INFO L129 PetriNetUnfolder]: 6/76 cut-off events. [2022-07-12 10:17:06,632 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:06,632 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:06,633 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] [2022-07-12 10:17:06,633 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:06,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:06,633 INFO L85 PathProgramCache]: Analyzing trace with hash 2058187582, now seen corresponding path program 1 times [2022-07-12 10:17:06,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:06,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176569331] [2022-07-12 10:17:06,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:06,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:06,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:06,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176569331] [2022-07-12 10:17:06,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176569331] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:06,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:06,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:06,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939056479] [2022-07-12 10:17:06,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:06,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:06,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:06,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:06,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:06,662 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 229 [2022-07-12 10:17:06,663 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 229 transitions, 518 flow. Second operand has 3 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:06,663 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:06,663 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 229 [2022-07-12 10:17:06,663 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:06,779 INFO L129 PetriNetUnfolder]: 58/786 cut-off events. [2022-07-12 10:17:06,779 INFO L130 PetriNetUnfolder]: For 270/270 co-relation queries the response was YES. [2022-07-12 10:17:06,784 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1012 conditions, 786 events. 58/786 cut-off events. For 270/270 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3699 event pairs, 23 based on Foata normal form. 884/1623 useless extension candidates. Maximal degree in co-relation 590. Up to 110 conditions per place. [2022-07-12 10:17:06,785 INFO L132 encePairwiseOnDemand]: 190/229 looper letters, 14 selfloop transitions, 2 changer transitions 24/196 dead transitions. [2022-07-12 10:17:06,785 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 196 transitions, 494 flow [2022-07-12 10:17:06,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:06,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:06,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 590 transitions. [2022-07-12 10:17:06,787 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.858806404657933 [2022-07-12 10:17:06,787 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 590 transitions. [2022-07-12 10:17:06,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 590 transitions. [2022-07-12 10:17:06,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:06,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 590 transitions. [2022-07-12 10:17:06,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:06,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:06,790 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:06,790 INFO L186 Difference]: Start difference. First operand has 198 places, 229 transitions, 518 flow. Second operand 3 states and 590 transitions. [2022-07-12 10:17:06,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 196 transitions, 494 flow [2022-07-12 10:17:06,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 196 transitions, 494 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:06,794 INFO L242 Difference]: Finished difference. Result has 200 places, 169 transitions, 393 flow [2022-07-12 10:17:06,794 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=393, PETRI_PLACES=200, PETRI_TRANSITIONS=169} [2022-07-12 10:17:06,795 INFO L279 CegarLoopForPetriNet]: 198 programPoint places, 2 predicate places. [2022-07-12 10:17:06,795 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 169 transitions, 393 flow [2022-07-12 10:17:06,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:06,796 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:06,796 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] [2022-07-12 10:17:06,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 10:17:06,796 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:06,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:06,796 INFO L85 PathProgramCache]: Analyzing trace with hash -953336994, now seen corresponding path program 1 times [2022-07-12 10:17:06,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:06,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090413369] [2022-07-12 10:17:06,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:06,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:06,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:06,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090413369] [2022-07-12 10:17:06,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090413369] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:06,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786956473] [2022-07-12 10:17:06,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:06,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:06,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:06,827 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) [2022-07-12 10:17:06,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:17:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:06,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:06,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:06,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:06,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:06,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786956473] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:06,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:06,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:06,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668749274] [2022-07-12 10:17:06,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:06,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:06,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:06,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:06,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:06,948 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 229 [2022-07-12 10:17:06,949 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 169 transitions, 393 flow. Second operand has 10 states, 10 states have (on average 176.3) internal successors, (1763), 10 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:06,949 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:06,949 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 229 [2022-07-12 10:17:06,950 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:07,028 INFO L129 PetriNetUnfolder]: 3/236 cut-off events. [2022-07-12 10:17:07,028 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-07-12 10:17:07,030 INFO L84 FinitePrefix]: Finished finitePrefix Result has 317 conditions, 236 events. 3/236 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 523 event pairs, 0 based on Foata normal form. 2/235 useless extension candidates. Maximal degree in co-relation 258. Up to 15 conditions per place. [2022-07-12 10:17:07,031 INFO L132 encePairwiseOnDemand]: 223/229 looper letters, 15 selfloop transitions, 9 changer transitions 0/179 dead transitions. [2022-07-12 10:17:07,031 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 179 transitions, 463 flow [2022-07-12 10:17:07,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:07,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:07,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1592 transitions. [2022-07-12 10:17:07,035 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.772440562833576 [2022-07-12 10:17:07,035 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1592 transitions. [2022-07-12 10:17:07,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1592 transitions. [2022-07-12 10:17:07,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:07,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1592 transitions. [2022-07-12 10:17:07,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 176.88888888888889) internal successors, (1592), 9 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:07,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 229.0) internal successors, (2290), 10 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:07,041 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 229.0) internal successors, (2290), 10 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:07,042 INFO L186 Difference]: Start difference. First operand has 200 places, 169 transitions, 393 flow. Second operand 9 states and 1592 transitions. [2022-07-12 10:17:07,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 179 transitions, 463 flow [2022-07-12 10:17:07,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 179 transitions, 441 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:07,045 INFO L242 Difference]: Finished difference. Result has 191 places, 175 transitions, 421 flow [2022-07-12 10:17:07,045 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=421, PETRI_PLACES=191, PETRI_TRANSITIONS=175} [2022-07-12 10:17:07,046 INFO L279 CegarLoopForPetriNet]: 198 programPoint places, -7 predicate places. [2022-07-12 10:17:07,046 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 175 transitions, 421 flow [2022-07-12 10:17:07,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 176.3) internal successors, (1763), 10 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:07,047 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:07,047 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] [2022-07-12 10:17:07,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:07,259 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,SelfDestructingSolverStorable15 [2022-07-12 10:17:07,259 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:07,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:07,260 INFO L85 PathProgramCache]: Analyzing trace with hash -474641827, now seen corresponding path program 1 times [2022-07-12 10:17:07,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:07,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188781102] [2022-07-12 10:17:07,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:07,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:07,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:07,333 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-12 10:17:07,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:07,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188781102] [2022-07-12 10:17:07,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188781102] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:07,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:07,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:17:07,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280409374] [2022-07-12 10:17:07,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:07,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:17:07,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:07,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:17:07,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:17:07,336 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 229 [2022-07-12 10:17:07,337 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 175 transitions, 421 flow. Second operand has 5 states, 5 states have (on average 157.6) internal successors, (788), 5 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:07,337 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:07,337 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 229 [2022-07-12 10:17:07,337 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:31,598 INFO L129 PetriNetUnfolder]: 110562/245093 cut-off events. [2022-07-12 10:17:31,598 INFO L130 PetriNetUnfolder]: For 2554/2554 co-relation queries the response was YES. [2022-07-12 10:17:33,431 INFO L84 FinitePrefix]: Finished finitePrefix Result has 389350 conditions, 245093 events. 110562/245093 cut-off events. For 2554/2554 co-relation queries the response was YES. Maximal size of possible extension queue 8979. Compared 3342821 event pairs, 76730 based on Foata normal form. 3875/246654 useless extension candidates. Maximal degree in co-relation 247817. Up to 88950 conditions per place. [2022-07-12 10:17:34,273 INFO L132 encePairwiseOnDemand]: 220/229 looper letters, 38 selfloop transitions, 6 changer transitions 65/254 dead transitions. [2022-07-12 10:17:34,274 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 254 transitions, 817 flow [2022-07-12 10:17:34,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:17:34,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:17:34,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1203 transitions. [2022-07-12 10:17:34,277 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7504678727386151 [2022-07-12 10:17:34,277 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1203 transitions. [2022-07-12 10:17:34,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1203 transitions. [2022-07-12 10:17:34,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:34,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1203 transitions. [2022-07-12 10:17:34,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 171.85714285714286) internal successors, (1203), 7 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:34,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 229.0) internal successors, (1832), 8 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:34,282 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 229.0) internal successors, (1832), 8 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:34,282 INFO L186 Difference]: Start difference. First operand has 191 places, 175 transitions, 421 flow. Second operand 7 states and 1203 transitions. [2022-07-12 10:17:34,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 254 transitions, 817 flow [2022-07-12 10:17:34,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 254 transitions, 811 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:34,288 INFO L242 Difference]: Finished difference. Result has 201 places, 180 transitions, 483 flow [2022-07-12 10:17:34,289 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=483, PETRI_PLACES=201, PETRI_TRANSITIONS=180} [2022-07-12 10:17:34,289 INFO L279 CegarLoopForPetriNet]: 198 programPoint places, 3 predicate places. [2022-07-12 10:17:34,290 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 180 transitions, 483 flow [2022-07-12 10:17:34,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 157.6) internal successors, (788), 5 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:34,290 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:34,290 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] [2022-07-12 10:17:34,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-12 10:17:34,291 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:34,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:34,291 INFO L85 PathProgramCache]: Analyzing trace with hash 2002231987, now seen corresponding path program 1 times [2022-07-12 10:17:34,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:34,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961262880] [2022-07-12 10:17:34,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:34,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:34,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:34,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961262880] [2022-07-12 10:17:34,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961262880] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:34,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261404266] [2022-07-12 10:17:34,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:34,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:34,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:34,350 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) [2022-07-12 10:17:34,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:17:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:34,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:17:34,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:34,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:34,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261404266] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:34,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:34,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:17:34,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721946204] [2022-07-12 10:17:34,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:34,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:17:34,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:34,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:17:34,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:17:34,582 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 229 [2022-07-12 10:17:34,584 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 180 transitions, 483 flow. Second operand has 18 states, 18 states have (on average 176.61111111111111) internal successors, (3179), 18 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:34,584 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:34,584 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 229 [2022-07-12 10:17:34,584 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:34,755 INFO L129 PetriNetUnfolder]: 49/633 cut-off events. [2022-07-12 10:17:34,756 INFO L130 PetriNetUnfolder]: For 115/311 co-relation queries the response was YES. [2022-07-12 10:17:34,761 INFO L84 FinitePrefix]: Finished finitePrefix Result has 966 conditions, 633 events. 49/633 cut-off events. For 115/311 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3384 event pairs, 23 based on Foata normal form. 3/619 useless extension candidates. Maximal degree in co-relation 949. Up to 81 conditions per place. [2022-07-12 10:17:34,763 INFO L132 encePairwiseOnDemand]: 224/229 looper letters, 18 selfloop transitions, 16 changer transitions 0/181 dead transitions. [2022-07-12 10:17:34,763 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 181 transitions, 565 flow [2022-07-12 10:17:34,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 10:17:34,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-12 10:17:34,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3169 transitions. [2022-07-12 10:17:34,768 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7688015526443474 [2022-07-12 10:17:34,768 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3169 transitions. [2022-07-12 10:17:34,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3169 transitions. [2022-07-12 10:17:34,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:34,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3169 transitions. [2022-07-12 10:17:34,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 176.05555555555554) internal successors, (3169), 18 states have internal predecessors, (3169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:34,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 229.0) internal successors, (4351), 19 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:34,778 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 229.0) internal successors, (4351), 19 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:34,778 INFO L186 Difference]: Start difference. First operand has 201 places, 180 transitions, 483 flow. Second operand 18 states and 3169 transitions. [2022-07-12 10:17:34,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 181 transitions, 565 flow [2022-07-12 10:17:34,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 181 transitions, 528 flow, removed 10 selfloop flow, removed 6 redundant places. [2022-07-12 10:17:34,781 INFO L242 Difference]: Finished difference. Result has 195 places, 172 transitions, 464 flow [2022-07-12 10:17:34,782 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=464, PETRI_PLACES=195, PETRI_TRANSITIONS=172} [2022-07-12 10:17:34,782 INFO L279 CegarLoopForPetriNet]: 198 programPoint places, -3 predicate places. [2022-07-12 10:17:34,782 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 172 transitions, 464 flow [2022-07-12 10:17:34,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 176.61111111111111) internal successors, (3179), 18 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:34,783 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:34,784 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] [2022-07-12 10:17:34,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:34,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-12 10:17:34,999 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:35,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:35,000 INFO L85 PathProgramCache]: Analyzing trace with hash 884848529, now seen corresponding path program 1 times [2022-07-12 10:17:35,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:35,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115378537] [2022-07-12 10:17:35,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:35,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:35,018 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:35,039 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:35,040 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:35,040 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:35,040 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:35,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-12 10:17:35,041 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:17:35,041 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:35,041 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-12 10:17:35,057 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-12 10:17:35,059 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 223 places, 259 transitions, 596 flow [2022-07-12 10:17:35,192 INFO L129 PetriNetUnfolder]: 277/1528 cut-off events. [2022-07-12 10:17:35,192 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-07-12 10:17:35,209 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1760 conditions, 1528 events. 277/1528 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 8502 event pairs, 72 based on Foata normal form. 0/1308 useless extension candidates. Maximal degree in co-relation 1003. Up to 192 conditions per place. [2022-07-12 10:17:35,210 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 259 transitions, 596 flow [2022-07-12 10:17:35,220 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 223 places, 259 transitions, 596 flow [2022-07-12 10:17:35,220 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:35,220 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@53aafc55, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1308898f [2022-07-12 10:17:35,221 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:35,223 INFO L129 PetriNetUnfolder]: 6/77 cut-off events. [2022-07-12 10:17:35,223 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:35,223 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:35,223 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] [2022-07-12 10:17:35,224 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:35,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:35,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1701775362, now seen corresponding path program 1 times [2022-07-12 10:17:35,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:35,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234248623] [2022-07-12 10:17:35,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:35,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:35,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:35,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234248623] [2022-07-12 10:17:35,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234248623] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:35,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:35,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:17:35,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629463667] [2022-07-12 10:17:35,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:35,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:17:35,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:35,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:17:35,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:17:35,234 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 259 [2022-07-12 10:17:35,235 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 259 transitions, 596 flow. Second operand has 2 states, 2 states have (on average 205.0) internal successors, (410), 2 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:35,235 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:35,235 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 259 [2022-07-12 10:17:35,235 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:35,391 INFO L129 PetriNetUnfolder]: 142/1386 cut-off events. [2022-07-12 10:17:35,392 INFO L130 PetriNetUnfolder]: For 647/647 co-relation queries the response was YES. [2022-07-12 10:17:35,404 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1817 conditions, 1386 events. 142/1386 cut-off events. For 647/647 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8108 event pairs, 72 based on Foata normal form. 1321/2622 useless extension candidates. Maximal degree in co-relation 990. Up to 199 conditions per place. [2022-07-12 10:17:35,406 INFO L132 encePairwiseOnDemand]: 217/259 looper letters, 6 selfloop transitions, 0 changer transitions 25/216 dead transitions. [2022-07-12 10:17:35,406 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 216 transitions, 534 flow [2022-07-12 10:17:35,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:17:35,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:17:35,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 462 transitions. [2022-07-12 10:17:35,408 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8918918918918919 [2022-07-12 10:17:35,408 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 462 transitions. [2022-07-12 10:17:35,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 462 transitions. [2022-07-12 10:17:35,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:35,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 462 transitions. [2022-07-12 10:17:35,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 231.0) internal successors, (462), 2 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:35,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:35,410 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:35,410 INFO L186 Difference]: Start difference. First operand has 223 places, 259 transitions, 596 flow. Second operand 2 states and 462 transitions. [2022-07-12 10:17:35,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 216 transitions, 534 flow [2022-07-12 10:17:35,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 216 transitions, 534 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:35,414 INFO L242 Difference]: Finished difference. Result has 223 places, 191 transitions, 442 flow [2022-07-12 10:17:35,414 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=259, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=442, PETRI_PLACES=223, PETRI_TRANSITIONS=191} [2022-07-12 10:17:35,414 INFO L279 CegarLoopForPetriNet]: 223 programPoint places, 0 predicate places. [2022-07-12 10:17:35,415 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 191 transitions, 442 flow [2022-07-12 10:17:35,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 205.0) internal successors, (410), 2 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:35,415 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:35,415 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] [2022-07-12 10:17:35,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-12 10:17:35,415 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:35,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:35,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1061042512, now seen corresponding path program 1 times [2022-07-12 10:17:35,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:35,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893597728] [2022-07-12 10:17:35,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:35,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:35,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:35,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:35,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893597728] [2022-07-12 10:17:35,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893597728] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:35,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:35,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:35,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310503886] [2022-07-12 10:17:35,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:35,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:35,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:35,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:35,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:35,432 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 259 [2022-07-12 10:17:35,433 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 191 transitions, 442 flow. Second operand has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:35,433 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:35,433 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 259 [2022-07-12 10:17:35,433 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:35,471 INFO L129 PetriNetUnfolder]: 6/310 cut-off events. [2022-07-12 10:17:35,471 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-12 10:17:35,473 INFO L84 FinitePrefix]: Finished finitePrefix Result has 392 conditions, 310 events. 6/310 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 836 event pairs, 0 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 383. Up to 36 conditions per place. [2022-07-12 10:17:35,473 INFO L132 encePairwiseOnDemand]: 256/259 looper letters, 15 selfloop transitions, 2 changer transitions 0/195 dead transitions. [2022-07-12 10:17:35,473 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 195 transitions, 484 flow [2022-07-12 10:17:35,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:35,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:35,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 609 transitions. [2022-07-12 10:17:35,475 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7837837837837838 [2022-07-12 10:17:35,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 609 transitions. [2022-07-12 10:17:35,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 609 transitions. [2022-07-12 10:17:35,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:35,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 609 transitions. [2022-07-12 10:17:35,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:35,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 259.0) internal successors, (1036), 4 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:35,478 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 259.0) internal successors, (1036), 4 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:35,478 INFO L186 Difference]: Start difference. First operand has 223 places, 191 transitions, 442 flow. Second operand 3 states and 609 transitions. [2022-07-12 10:17:35,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 195 transitions, 484 flow [2022-07-12 10:17:35,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 195 transitions, 454 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:35,481 INFO L242 Difference]: Finished difference. Result has 207 places, 192 transitions, 424 flow [2022-07-12 10:17:35,482 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=259, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=424, PETRI_PLACES=207, PETRI_TRANSITIONS=192} [2022-07-12 10:17:35,482 INFO L279 CegarLoopForPetriNet]: 223 programPoint places, -16 predicate places. [2022-07-12 10:17:35,482 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 192 transitions, 424 flow [2022-07-12 10:17:35,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:35,483 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:35,483 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] [2022-07-12 10:17:35,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-12 10:17:35,483 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:35,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:35,483 INFO L85 PathProgramCache]: Analyzing trace with hash -183362971, now seen corresponding path program 1 times [2022-07-12 10:17:35,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:35,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407290098] [2022-07-12 10:17:35,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:35,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:35,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:35,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:35,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407290098] [2022-07-12 10:17:35,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407290098] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:35,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677521323] [2022-07-12 10:17:35,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:35,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:35,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:35,507 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) [2022-07-12 10:17:35,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:17:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:35,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:35,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:35,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:35,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677521323] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:35,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:35,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:35,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293947692] [2022-07-12 10:17:35,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:35,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:35,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:35,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:35,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:35,622 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 259 [2022-07-12 10:17:35,623 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 192 transitions, 424 flow. Second operand has 10 states, 10 states have (on average 198.3) internal successors, (1983), 10 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:35,624 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:35,624 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 259 [2022-07-12 10:17:35,624 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:35,771 INFO L129 PetriNetUnfolder]: 4/282 cut-off events. [2022-07-12 10:17:35,771 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-12 10:17:35,772 INFO L84 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 282 events. 4/282 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 682 event pairs, 0 based on Foata normal form. 2/280 useless extension candidates. Maximal degree in co-relation 356. Up to 19 conditions per place. [2022-07-12 10:17:35,773 INFO L132 encePairwiseOnDemand]: 253/259 looper letters, 16 selfloop transitions, 9 changer transitions 0/202 dead transitions. [2022-07-12 10:17:35,773 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 202 transitions, 496 flow [2022-07-12 10:17:35,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:35,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:35,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1791 transitions. [2022-07-12 10:17:35,776 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7683397683397684 [2022-07-12 10:17:35,776 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1791 transitions. [2022-07-12 10:17:35,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1791 transitions. [2022-07-12 10:17:35,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:35,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1791 transitions. [2022-07-12 10:17:35,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 199.0) internal successors, (1791), 9 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:35,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 259.0) internal successors, (2590), 10 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:35,782 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 259.0) internal successors, (2590), 10 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:35,783 INFO L186 Difference]: Start difference. First operand has 207 places, 192 transitions, 424 flow. Second operand 9 states and 1791 transitions. [2022-07-12 10:17:35,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 202 transitions, 496 flow [2022-07-12 10:17:35,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 202 transitions, 494 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:35,786 INFO L242 Difference]: Finished difference. Result has 217 places, 198 transitions, 472 flow [2022-07-12 10:17:35,786 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=259, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=472, PETRI_PLACES=217, PETRI_TRANSITIONS=198} [2022-07-12 10:17:35,786 INFO L279 CegarLoopForPetriNet]: 223 programPoint places, -6 predicate places. [2022-07-12 10:17:35,786 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 198 transitions, 472 flow [2022-07-12 10:17:35,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 198.3) internal successors, (1983), 10 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:35,787 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:35,788 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:35,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:36,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:36,003 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:36,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:36,003 INFO L85 PathProgramCache]: Analyzing trace with hash 2006824300, now seen corresponding path program 1 times [2022-07-12 10:17:36,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:36,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768531022] [2022-07-12 10:17:36,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:36,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-12 10:17:36,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:36,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768531022] [2022-07-12 10:17:36,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768531022] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:36,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:36,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:17:36,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438026030] [2022-07-12 10:17:36,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:36,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:17:36,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:36,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:17:36,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:17:36,042 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 259 [2022-07-12 10:17:36,042 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 198 transitions, 472 flow. Second operand has 5 states, 5 states have (on average 175.6) internal successors, (878), 5 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:36,043 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:36,043 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 259 [2022-07-12 10:17:36,043 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand