./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_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 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:50:56,669 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:50:56,671 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:50:56,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:50:56,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:50:56,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:50:56,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:50:56,712 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:50:56,713 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:50:56,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:50:56,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:50:56,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:50:56,723 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:50:56,724 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:50:56,725 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:50:56,726 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:50:56,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:50:56,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:50:56,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:50:56,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:50:56,736 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:50:56,737 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:50:56,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:50:56,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:50:56,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:50:56,751 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:50:56,753 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:50:56,753 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:50:56,754 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:50:56,754 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:50:56,754 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:50:56,755 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:50:56,756 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:50:56,756 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:50:56,757 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:50:56,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:50:56,758 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:50:56,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:50:56,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:50:56,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:50:56,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:50:56,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:50:56,761 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:50:56,777 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:50:56,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:50:56,778 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:50:56,778 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:50:56,779 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:50:56,779 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:50:56,779 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:50:56,779 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:50:56,780 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:50:56,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:50:56,780 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:50:56,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:50:56,781 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:50:56,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:50:56,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:50:56,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:50:56,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:50:56,781 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:50:56,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:50:56,782 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:50:56,782 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:50:56,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:50:56,782 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:50:56,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:50:56,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:50:56,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:50:56,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:50:56,783 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:50:56,783 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:50:56,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:50:56,783 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:50:56,784 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:50:56,784 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:50:56,784 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 [2022-07-21 08:50:57,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:50:57,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:50:57,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:50:57,042 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:50:57,043 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:50:57,044 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i [2022-07-21 08:50:57,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/268e2b7c4/48233515416641d999597a6faa03f77f/FLAGbddeafad0 [2022-07-21 08:50:57,551 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:50:57,551 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i [2022-07-21 08:50:57,563 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/268e2b7c4/48233515416641d999597a6faa03f77f/FLAGbddeafad0 [2022-07-21 08:50:57,581 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/268e2b7c4/48233515416641d999597a6faa03f77f [2022-07-21 08:50:57,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:50:57,584 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:50:57,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:50:57,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:50:57,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:50:57,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:50:57" (1/1) ... [2022-07-21 08:50:57,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29e31750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:57, skipping insertion in model container [2022-07-21 08:50:57,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:50:57" (1/1) ... [2022-07-21 08:50:57,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:50:57,622 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:50:57,902 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_22-deref_read_racefree.i[30176,30189] [2022-07-21 08:50:57,918 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:50:57,926 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:50:57,955 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_22-deref_read_racefree.i[30176,30189] [2022-07-21 08:50:57,971 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:50:58,002 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:50:58,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:58 WrapperNode [2022-07-21 08:50:58,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:50:58,004 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:50:58,004 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:50:58,004 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:50:58,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:58" (1/1) ... [2022-07-21 08:50:58,029 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:58" (1/1) ... [2022-07-21 08:50:58,044 INFO L137 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2022-07-21 08:50:58,045 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:50:58,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:50:58,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:50:58,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:50:58,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:58" (1/1) ... [2022-07-21 08:50:58,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:58" (1/1) ... [2022-07-21 08:50:58,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:58" (1/1) ... [2022-07-21 08:50:58,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:58" (1/1) ... [2022-07-21 08:50:58,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:58" (1/1) ... [2022-07-21 08:50:58,061 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:58" (1/1) ... [2022-07-21 08:50:58,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:58" (1/1) ... [2022-07-21 08:50:58,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:50:58,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:50:58,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:50:58,065 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:50:58,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:58" (1/1) ... [2022-07-21 08:50:58,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:50:58,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:50:58,091 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 08:50:58,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 08:50:58,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 08:50:58,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:50:58,129 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-21 08:50:58,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:50:58,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:50:58,129 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-21 08:50:58,129 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-21 08:50:58,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:50:58,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:50:58,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:50:58,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:50:58,131 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 08:50:58,217 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:50:58,218 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:50:58,362 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:50:58,367 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:50:58,368 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2022-07-21 08:50:58,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:50:58 BoogieIcfgContainer [2022-07-21 08:50:58,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:50:58,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:50:58,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:50:58,373 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:50:58,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:50:57" (1/3) ... [2022-07-21 08:50:58,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5034b3f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:50:58, skipping insertion in model container [2022-07-21 08:50:58,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:58" (2/3) ... [2022-07-21 08:50:58,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5034b3f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:50:58, skipping insertion in model container [2022-07-21 08:50:58,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:50:58" (3/3) ... [2022-07-21 08:50:58,375 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_22-deref_read_racefree.i [2022-07-21 08:50:58,378 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:50:58,385 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:50:58,385 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 08:50:58,385 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:50:58,418 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:50:58,441 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 99 places, 106 transitions, 217 flow [2022-07-21 08:50:58,482 INFO L129 PetriNetUnfolder]: 14/140 cut-off events. [2022-07-21 08:50:58,483 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:50:58,486 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 140 events. 14/140 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 315 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 71. Up to 4 conditions per place. [2022-07-21 08:50:58,487 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 106 transitions, 217 flow [2022-07-21 08:50:58,490 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 106 transitions, 217 flow [2022-07-21 08:50:58,497 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:50:58,501 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:50:58,502 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:50:58,515 INFO L129 PetriNetUnfolder]: 4/89 cut-off events. [2022-07-21 08:50:58,516 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:50:58,516 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:58,517 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] [2022-07-21 08:50:58,517 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:58,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:58,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1463212038, now seen corresponding path program 1 times [2022-07-21 08:50:58,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:58,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788163360] [2022-07-21 08:50:58,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:58,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:58,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:58,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:58,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:58,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788163360] [2022-07-21 08:50:58,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788163360] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:58,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:58,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:50:58,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593083887] [2022-07-21 08:50:58,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:58,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:50:58,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:58,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:50:58,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:50:58,749 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 106 [2022-07-21 08:50:58,751 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 106 transitions, 217 flow. Second operand has 2 states, 2 states have (on average 94.5) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:58,752 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:58,752 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 106 [2022-07-21 08:50:58,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:58,779 INFO L129 PetriNetUnfolder]: 0/124 cut-off events. [2022-07-21 08:50:58,781 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:50:58,782 INFO L84 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 124 events. 0/124 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 189 event pairs, 0 based on Foata normal form. 14/134 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-07-21 08:50:58,783 INFO L132 encePairwiseOnDemand]: 96/106 looper letters, 1 selfloop transitions, 0 changer transitions 12/95 dead transitions. [2022-07-21 08:50:58,784 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 95 transitions, 197 flow [2022-07-21 08:50:58,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:50:58,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:50:58,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 199 transitions. [2022-07-21 08:50:58,795 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9386792452830188 [2022-07-21 08:50:58,796 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 199 transitions. [2022-07-21 08:50:58,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 199 transitions. [2022-07-21 08:50:58,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:58,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 199 transitions. [2022-07-21 08:50:58,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 99.5) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:58,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:58,813 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:58,814 INFO L186 Difference]: Start difference. First operand has 99 places, 106 transitions, 217 flow. Second operand 2 states and 199 transitions. [2022-07-21 08:50:58,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 95 transitions, 197 flow [2022-07-21 08:50:58,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 95 transitions, 197 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:58,825 INFO L242 Difference]: Finished difference. Result has 99 places, 83 transitions, 171 flow [2022-07-21 08:50:58,827 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=171, PETRI_PLACES=99, PETRI_TRANSITIONS=83} [2022-07-21 08:50:58,830 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, 0 predicate places. [2022-07-21 08:50:58,831 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 83 transitions, 171 flow [2022-07-21 08:50:58,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 94.5) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:58,831 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:58,832 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:58,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:50:58,833 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:58,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:58,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1169809031, now seen corresponding path program 1 times [2022-07-21 08:50:58,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:58,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944197366] [2022-07-21 08:50:58,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:58,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:58,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:58,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:58,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944197366] [2022-07-21 08:50:58,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944197366] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:58,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:58,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:50:58,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131914040] [2022-07-21 08:50:58,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:58,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:50:58,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:58,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:50:58,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:50:58,914 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 106 [2022-07-21 08:50:58,915 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 83 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:58,915 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:58,915 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 106 [2022-07-21 08:50:58,915 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:58,951 INFO L129 PetriNetUnfolder]: 0/87 cut-off events. [2022-07-21 08:50:58,954 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:50:58,955 INFO L84 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 87 events. 0/87 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-21 08:50:58,955 INFO L132 encePairwiseOnDemand]: 103/106 looper letters, 8 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2022-07-21 08:50:58,955 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 85 transitions, 195 flow [2022-07-21 08:50:58,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:50:58,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:50:58,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 272 transitions. [2022-07-21 08:50:58,958 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8553459119496856 [2022-07-21 08:50:58,960 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 272 transitions. [2022-07-21 08:50:58,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 272 transitions. [2022-07-21 08:50:58,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:58,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 272 transitions. [2022-07-21 08:50:58,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:58,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:58,963 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:58,964 INFO L186 Difference]: Start difference. First operand has 99 places, 83 transitions, 171 flow. Second operand 3 states and 272 transitions. [2022-07-21 08:50:58,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 85 transitions, 195 flow [2022-07-21 08:50:58,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 85 transitions, 195 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:58,966 INFO L242 Difference]: Finished difference. Result has 90 places, 83 transitions, 179 flow [2022-07-21 08:50:58,968 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=90, PETRI_TRANSITIONS=83} [2022-07-21 08:50:58,969 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, -9 predicate places. [2022-07-21 08:50:58,969 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 83 transitions, 179 flow [2022-07-21 08:50:58,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:58,969 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:58,969 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:58,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:50:58,970 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:58,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:58,972 INFO L85 PathProgramCache]: Analyzing trace with hash 602894772, now seen corresponding path program 1 times [2022-07-21 08:50:58,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:58,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687940842] [2022-07-21 08:50:58,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:58,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:59,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:59,016 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:50:59,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:59,061 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:50:59,061 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:50:59,062 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:50:59,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:50:59,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:50:59,065 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-21 08:50:59,071 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:50:59,071 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-21 08:50:59,092 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:50:59,097 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 128 places, 139 transitions, 290 flow [2022-07-21 08:50:59,127 INFO L129 PetriNetUnfolder]: 24/212 cut-off events. [2022-07-21 08:50:59,127 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 08:50:59,129 INFO L84 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 212 events. 24/212 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 591 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 141. Up to 6 conditions per place. [2022-07-21 08:50:59,130 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 139 transitions, 290 flow [2022-07-21 08:50:59,131 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 139 transitions, 290 flow [2022-07-21 08:50:59,133 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:50:59,134 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:50:59,134 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:50:59,139 INFO L129 PetriNetUnfolder]: 4/89 cut-off events. [2022-07-21 08:50:59,140 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:50:59,140 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:59,140 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] [2022-07-21 08:50:59,140 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:59,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:59,141 INFO L85 PathProgramCache]: Analyzing trace with hash -2146504794, now seen corresponding path program 1 times [2022-07-21 08:50:59,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:59,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242670249] [2022-07-21 08:50:59,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:59,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:59,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:59,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242670249] [2022-07-21 08:50:59,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242670249] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:59,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:59,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:50:59,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930030329] [2022-07-21 08:50:59,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:59,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:50:59,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:59,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:50:59,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:50:59,169 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 139 [2022-07-21 08:50:59,169 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 139 transitions, 290 flow. Second operand has 2 states, 2 states have (on average 120.5) internal successors, (241), 2 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:59,169 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:59,169 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 139 [2022-07-21 08:50:59,169 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:59,196 INFO L129 PetriNetUnfolder]: 0/185 cut-off events. [2022-07-21 08:50:59,197 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-21 08:50:59,197 INFO L84 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 185 events. 0/185 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 443 event pairs, 0 based on Foata normal form. 26/205 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2022-07-21 08:50:59,198 INFO L132 encePairwiseOnDemand]: 123/139 looper letters, 2 selfloop transitions, 0 changer transitions 12/122 dead transitions. [2022-07-21 08:50:59,198 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 122 transitions, 260 flow [2022-07-21 08:50:59,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:50:59,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:50:59,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 258 transitions. [2022-07-21 08:50:59,202 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9280575539568345 [2022-07-21 08:50:59,202 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 258 transitions. [2022-07-21 08:50:59,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 258 transitions. [2022-07-21 08:50:59,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:59,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 258 transitions. [2022-07-21 08:50:59,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 129.0) internal successors, (258), 2 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:59,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:59,205 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:59,205 INFO L186 Difference]: Start difference. First operand has 128 places, 139 transitions, 290 flow. Second operand 2 states and 258 transitions. [2022-07-21 08:50:59,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 122 transitions, 260 flow [2022-07-21 08:50:59,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 122 transitions, 258 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:59,211 INFO L242 Difference]: Finished difference. Result has 128 places, 110 transitions, 230 flow [2022-07-21 08:50:59,211 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=230, PETRI_PLACES=128, PETRI_TRANSITIONS=110} [2022-07-21 08:50:59,213 INFO L279 CegarLoopForPetriNet]: 128 programPoint places, 0 predicate places. [2022-07-21 08:50:59,213 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 110 transitions, 230 flow [2022-07-21 08:50:59,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 120.5) internal successors, (241), 2 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:59,213 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:59,213 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] [2022-07-21 08:50:59,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 08:50:59,214 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:59,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:59,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1855059495, now seen corresponding path program 1 times [2022-07-21 08:50:59,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:59,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500264506] [2022-07-21 08:50:59,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:59,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:59,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:59,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:59,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500264506] [2022-07-21 08:50:59,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500264506] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:59,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:59,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:50:59,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537549669] [2022-07-21 08:50:59,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:59,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:50:59,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:59,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:50:59,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:50:59,286 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 139 [2022-07-21 08:50:59,287 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 110 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:59,287 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:59,288 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 139 [2022-07-21 08:50:59,288 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:59,327 INFO L129 PetriNetUnfolder]: 0/136 cut-off events. [2022-07-21 08:50:59,327 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:50:59,327 INFO L84 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 136 events. 0/136 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 219 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-07-21 08:50:59,327 INFO L132 encePairwiseOnDemand]: 136/139 looper letters, 11 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2022-07-21 08:50:59,328 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 114 transitions, 264 flow [2022-07-21 08:50:59,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:50:59,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:50:59,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2022-07-21 08:50:59,329 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8465227817745803 [2022-07-21 08:50:59,329 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2022-07-21 08:50:59,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2022-07-21 08:50:59,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:59,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2022-07-21 08:50:59,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:59,332 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) [2022-07-21 08:50:59,333 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) [2022-07-21 08:50:59,333 INFO L186 Difference]: Start difference. First operand has 128 places, 110 transitions, 230 flow. Second operand 3 states and 353 transitions. [2022-07-21 08:50:59,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 114 transitions, 264 flow [2022-07-21 08:50:59,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 114 transitions, 264 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:59,337 INFO L242 Difference]: Finished difference. Result has 119 places, 111 transitions, 242 flow [2022-07-21 08:50:59,337 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=119, PETRI_TRANSITIONS=111} [2022-07-21 08:50:59,339 INFO L279 CegarLoopForPetriNet]: 128 programPoint places, -9 predicate places. [2022-07-21 08:50:59,339 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 111 transitions, 242 flow [2022-07-21 08:50:59,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:59,339 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:59,340 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:59,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 08:50:59,340 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:59,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:59,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1922399296, now seen corresponding path program 1 times [2022-07-21 08:50:59,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:59,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218165191] [2022-07-21 08:50:59,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:59,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:59,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:59,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218165191] [2022-07-21 08:50:59,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218165191] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:50:59,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154357072] [2022-07-21 08:50:59,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:59,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:50:59,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:50:59,423 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:50:59,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 08:50:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:59,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:50:59,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:50:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:59,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:50:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:59,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154357072] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:50:59,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:50:59,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:50:59,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662747811] [2022-07-21 08:50:59,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:50:59,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:50:59,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:59,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:50:59,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:50:59,653 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 139 [2022-07-21 08:50:59,655 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 111 transitions, 242 flow. Second operand has 10 states, 10 states have (on average 114.3) internal successors, (1143), 10 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:59,655 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:59,655 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 139 [2022-07-21 08:50:59,655 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:59,721 INFO L129 PetriNetUnfolder]: 0/110 cut-off events. [2022-07-21 08:50:59,721 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 08:50:59,721 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 110 events. 0/110 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 2/112 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-07-21 08:50:59,721 INFO L132 encePairwiseOnDemand]: 134/139 looper letters, 9 selfloop transitions, 7 changer transitions 0/104 dead transitions. [2022-07-21 08:50:59,721 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 104 transitions, 258 flow [2022-07-21 08:50:59,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:50:59,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:50:59,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1026 transitions. [2022-07-21 08:50:59,724 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8201438848920863 [2022-07-21 08:50:59,724 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1026 transitions. [2022-07-21 08:50:59,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1026 transitions. [2022-07-21 08:50:59,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:59,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1026 transitions. [2022-07-21 08:50:59,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 114.0) internal successors, (1026), 9 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:59,729 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) [2022-07-21 08:50:59,732 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) [2022-07-21 08:50:59,732 INFO L186 Difference]: Start difference. First operand has 119 places, 111 transitions, 242 flow. Second operand 9 states and 1026 transitions. [2022-07-21 08:50:59,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 104 transitions, 258 flow [2022-07-21 08:50:59,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 104 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:50:59,734 INFO L242 Difference]: Finished difference. Result has 113 places, 100 transitions, 230 flow [2022-07-21 08:50:59,734 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=230, PETRI_PLACES=113, PETRI_TRANSITIONS=100} [2022-07-21 08:50:59,737 INFO L279 CegarLoopForPetriNet]: 128 programPoint places, -15 predicate places. [2022-07-21 08:50:59,737 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 100 transitions, 230 flow [2022-07-21 08:50:59,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.3) internal successors, (1143), 10 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:50:59,738 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:59,739 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:59,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 08:50:59,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-21 08:50:59,952 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:59,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:59,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1177181810, now seen corresponding path program 1 times [2022-07-21 08:50:59,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:59,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990616282] [2022-07-21 08:50:59,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:59,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:59,972 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:50:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:59,985 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:50:59,985 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:50:59,985 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:50:59,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:50:59,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 08:50:59,985 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-21 08:50:59,986 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:50:59,986 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-21 08:51:00,011 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:51:00,012 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 157 places, 172 transitions, 365 flow [2022-07-21 08:51:00,030 INFO L129 PetriNetUnfolder]: 34/284 cut-off events. [2022-07-21 08:51:00,030 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-21 08:51:00,032 INFO L84 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 284 events. 34/284 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 864 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 216. Up to 8 conditions per place. [2022-07-21 08:51:00,032 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 172 transitions, 365 flow [2022-07-21 08:51:00,034 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 172 transitions, 365 flow [2022-07-21 08:51:00,035 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:00,035 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:51:00,035 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:00,039 INFO L129 PetriNetUnfolder]: 5/91 cut-off events. [2022-07-21 08:51:00,040 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:00,040 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:00,040 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] [2022-07-21 08:51:00,040 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:00,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:00,040 INFO L85 PathProgramCache]: Analyzing trace with hash 277282342, now seen corresponding path program 1 times [2022-07-21 08:51:00,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:00,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237313045] [2022-07-21 08:51:00,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:00,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:00,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:00,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:00,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:00,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237313045] [2022-07-21 08:51:00,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237313045] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:00,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:00,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:51:00,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086712348] [2022-07-21 08:51:00,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:00,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:51:00,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:00,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:51:00,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:51:00,054 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 172 [2022-07-21 08:51:00,054 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 172 transitions, 365 flow. Second operand has 2 states, 2 states have (on average 146.5) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,054 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:00,054 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 172 [2022-07-21 08:51:00,054 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:00,077 INFO L129 PetriNetUnfolder]: 0/246 cut-off events. [2022-07-21 08:51:00,077 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-07-21 08:51:00,078 INFO L84 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 246 events. 0/246 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 722 event pairs, 0 based on Foata normal form. 42/280 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-07-21 08:51:00,078 INFO L132 encePairwiseOnDemand]: 150/172 looper letters, 3 selfloop transitions, 0 changer transitions 12/149 dead transitions. [2022-07-21 08:51:00,078 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 149 transitions, 325 flow [2022-07-21 08:51:00,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:51:00,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:51:00,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 317 transitions. [2022-07-21 08:51:00,079 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9215116279069767 [2022-07-21 08:51:00,079 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 317 transitions. [2022-07-21 08:51:00,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 317 transitions. [2022-07-21 08:51:00,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:00,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 317 transitions. [2022-07-21 08:51:00,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 158.5) internal successors, (317), 2 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,081 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,081 INFO L186 Difference]: Start difference. First operand has 157 places, 172 transitions, 365 flow. Second operand 2 states and 317 transitions. [2022-07-21 08:51:00,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 149 transitions, 325 flow [2022-07-21 08:51:00,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 149 transitions, 319 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:00,083 INFO L242 Difference]: Finished difference. Result has 157 places, 137 transitions, 289 flow [2022-07-21 08:51:00,084 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=289, PETRI_PLACES=157, PETRI_TRANSITIONS=137} [2022-07-21 08:51:00,084 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 0 predicate places. [2022-07-21 08:51:00,085 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 137 transitions, 289 flow [2022-07-21 08:51:00,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 146.5) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,085 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:00,085 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] [2022-07-21 08:51:00,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 08:51:00,085 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:00,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:00,086 INFO L85 PathProgramCache]: Analyzing trace with hash -16120665, now seen corresponding path program 1 times [2022-07-21 08:51:00,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:00,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400066316] [2022-07-21 08:51:00,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:00,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:00,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:00,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:00,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400066316] [2022-07-21 08:51:00,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400066316] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:00,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:00,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:00,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360713750] [2022-07-21 08:51:00,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:00,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:00,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:00,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:00,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:00,114 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 172 [2022-07-21 08:51:00,115 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 137 transitions, 289 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:00,115 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 172 [2022-07-21 08:51:00,115 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:00,143 INFO L129 PetriNetUnfolder]: 0/185 cut-off events. [2022-07-21 08:51:00,143 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 08:51:00,143 INFO L84 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 185 events. 0/185 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 402 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-07-21 08:51:00,144 INFO L132 encePairwiseOnDemand]: 169/172 looper letters, 12 selfloop transitions, 2 changer transitions 0/141 dead transitions. [2022-07-21 08:51:00,144 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 141 transitions, 325 flow [2022-07-21 08:51:00,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:00,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:00,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2022-07-21 08:51:00,145 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8372093023255814 [2022-07-21 08:51:00,145 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2022-07-21 08:51:00,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2022-07-21 08:51:00,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:00,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2022-07-21 08:51:00,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,148 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,148 INFO L186 Difference]: Start difference. First operand has 157 places, 137 transitions, 289 flow. Second operand 3 states and 432 transitions. [2022-07-21 08:51:00,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 141 transitions, 325 flow [2022-07-21 08:51:00,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 141 transitions, 325 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:00,150 INFO L242 Difference]: Finished difference. Result has 148 places, 138 transitions, 301 flow [2022-07-21 08:51:00,151 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=301, PETRI_PLACES=148, PETRI_TRANSITIONS=138} [2022-07-21 08:51:00,152 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, -9 predicate places. [2022-07-21 08:51:00,152 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 138 transitions, 301 flow [2022-07-21 08:51:00,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,152 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:00,152 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:00,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 08:51:00,152 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:00,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:00,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1156559264, now seen corresponding path program 1 times [2022-07-21 08:51:00,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:00,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735785540] [2022-07-21 08:51:00,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:00,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:00,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:00,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735785540] [2022-07-21 08:51:00,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735785540] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:00,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769918353] [2022-07-21 08:51:00,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:00,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:00,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:00,211 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:00,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 08:51:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:00,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:00,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:00,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:00,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:00,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769918353] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:00,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:00,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:00,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198408923] [2022-07-21 08:51:00,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:00,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:00,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:00,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:00,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:00,380 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 172 [2022-07-21 08:51:00,381 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 138 transitions, 301 flow. Second operand has 10 states, 10 states have (on average 140.3) internal successors, (1403), 10 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,381 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:00,381 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 172 [2022-07-21 08:51:00,381 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:00,479 INFO L129 PetriNetUnfolder]: 0/159 cut-off events. [2022-07-21 08:51:00,480 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-21 08:51:00,480 INFO L84 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 159 events. 0/159 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 247 event pairs, 0 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-21 08:51:00,481 INFO L132 encePairwiseOnDemand]: 166/172 looper letters, 13 selfloop transitions, 9 changer transitions 0/148 dead transitions. [2022-07-21 08:51:00,481 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 148 transitions, 367 flow [2022-07-21 08:51:00,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:00,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:00,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1266 transitions. [2022-07-21 08:51:00,484 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8178294573643411 [2022-07-21 08:51:00,484 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1266 transitions. [2022-07-21 08:51:00,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1266 transitions. [2022-07-21 08:51:00,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:00,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1266 transitions. [2022-07-21 08:51:00,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 140.66666666666666) internal successors, (1266), 9 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,489 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,489 INFO L186 Difference]: Start difference. First operand has 148 places, 138 transitions, 301 flow. Second operand 9 states and 1266 transitions. [2022-07-21 08:51:00,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 148 transitions, 367 flow [2022-07-21 08:51:00,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 148 transitions, 365 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:00,492 INFO L242 Difference]: Finished difference. Result has 158 places, 144 transitions, 349 flow [2022-07-21 08:51:00,492 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=349, PETRI_PLACES=158, PETRI_TRANSITIONS=144} [2022-07-21 08:51:00,493 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 1 predicate places. [2022-07-21 08:51:00,493 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 144 transitions, 349 flow [2022-07-21 08:51:00,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 140.3) internal successors, (1403), 10 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,493 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:00,494 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:00,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:00,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 08:51:00,712 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:00,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:00,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1450639895, now seen corresponding path program 1 times [2022-07-21 08:51:00,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:00,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099023925] [2022-07-21 08:51:00,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:00,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:00,727 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:00,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:00,759 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:00,760 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:00,760 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:00,760 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:00,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 08:51:00,760 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-21 08:51:00,760 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:00,761 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-21 08:51:00,783 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:51:00,786 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 186 places, 205 transitions, 442 flow [2022-07-21 08:51:00,820 INFO L129 PetriNetUnfolder]: 44/356 cut-off events. [2022-07-21 08:51:00,820 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-21 08:51:00,825 INFO L84 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 356 events. 44/356 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1145 event pairs, 0 based on Foata normal form. 0/302 useless extension candidates. Maximal degree in co-relation 292. Up to 10 conditions per place. [2022-07-21 08:51:00,825 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 205 transitions, 442 flow [2022-07-21 08:51:00,828 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 205 transitions, 442 flow [2022-07-21 08:51:00,830 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:00,831 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:51:00,831 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:00,835 INFO L129 PetriNetUnfolder]: 4/87 cut-off events. [2022-07-21 08:51:00,835 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:00,835 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:00,835 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] [2022-07-21 08:51:00,836 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:00,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:00,836 INFO L85 PathProgramCache]: Analyzing trace with hash 144638854, now seen corresponding path program 1 times [2022-07-21 08:51:00,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:00,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587037877] [2022-07-21 08:51:00,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:00,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:00,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:00,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:00,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587037877] [2022-07-21 08:51:00,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587037877] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:00,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:00,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:51:00,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691084467] [2022-07-21 08:51:00,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:00,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:51:00,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:00,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:51:00,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:51:00,850 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 205 [2022-07-21 08:51:00,850 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 205 transitions, 442 flow. Second operand has 2 states, 2 states have (on average 172.5) internal successors, (345), 2 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,850 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:00,850 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 205 [2022-07-21 08:51:00,850 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:00,901 INFO L129 PetriNetUnfolder]: 0/307 cut-off events. [2022-07-21 08:51:00,901 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-21 08:51:00,901 INFO L84 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 307 events. 0/307 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 992 event pairs, 0 based on Foata normal form. 64/361 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2022-07-21 08:51:00,902 INFO L132 encePairwiseOnDemand]: 177/205 looper letters, 4 selfloop transitions, 0 changer transitions 12/176 dead transitions. [2022-07-21 08:51:00,902 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 176 transitions, 392 flow [2022-07-21 08:51:00,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:51:00,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:51:00,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 376 transitions. [2022-07-21 08:51:00,903 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9170731707317074 [2022-07-21 08:51:00,903 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 376 transitions. [2022-07-21 08:51:00,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 376 transitions. [2022-07-21 08:51:00,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:00,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 376 transitions. [2022-07-21 08:51:00,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 188.0) internal successors, (376), 2 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,905 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,905 INFO L186 Difference]: Start difference. First operand has 186 places, 205 transitions, 442 flow. Second operand 2 states and 376 transitions. [2022-07-21 08:51:00,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 176 transitions, 392 flow [2022-07-21 08:51:00,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 176 transitions, 380 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:00,907 INFO L242 Difference]: Finished difference. Result has 186 places, 164 transitions, 348 flow [2022-07-21 08:51:00,908 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=348, PETRI_PLACES=186, PETRI_TRANSITIONS=164} [2022-07-21 08:51:00,908 INFO L279 CegarLoopForPetriNet]: 186 programPoint places, 0 predicate places. [2022-07-21 08:51:00,908 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 164 transitions, 348 flow [2022-07-21 08:51:00,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 172.5) internal successors, (345), 2 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,908 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:00,908 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] [2022-07-21 08:51:00,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 08:51:00,909 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:00,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:00,909 INFO L85 PathProgramCache]: Analyzing trace with hash -148764153, now seen corresponding path program 1 times [2022-07-21 08:51:00,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:00,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255934768] [2022-07-21 08:51:00,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:00,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:00,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:00,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:00,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255934768] [2022-07-21 08:51:00,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255934768] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:00,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:00,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:00,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701567671] [2022-07-21 08:51:00,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:00,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:00,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:00,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:00,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:00,926 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 205 [2022-07-21 08:51:00,926 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 164 transitions, 348 flow. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,926 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:00,926 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 205 [2022-07-21 08:51:00,926 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:00,961 INFO L129 PetriNetUnfolder]: 0/234 cut-off events. [2022-07-21 08:51:00,961 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 08:51:00,961 INFO L84 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 234 events. 0/234 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 587 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-07-21 08:51:00,962 INFO L132 encePairwiseOnDemand]: 202/205 looper letters, 13 selfloop transitions, 2 changer transitions 0/168 dead transitions. [2022-07-21 08:51:00,962 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 168 transitions, 386 flow [2022-07-21 08:51:00,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:00,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:00,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2022-07-21 08:51:00,963 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8308943089430895 [2022-07-21 08:51:00,963 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2022-07-21 08:51:00,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2022-07-21 08:51:00,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:00,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2022-07-21 08:51:00,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,965 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,966 INFO L186 Difference]: Start difference. First operand has 186 places, 164 transitions, 348 flow. Second operand 3 states and 511 transitions. [2022-07-21 08:51:00,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 168 transitions, 386 flow [2022-07-21 08:51:00,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 168 transitions, 386 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:00,968 INFO L242 Difference]: Finished difference. Result has 177 places, 165 transitions, 360 flow [2022-07-21 08:51:00,969 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=360, PETRI_PLACES=177, PETRI_TRANSITIONS=165} [2022-07-21 08:51:00,969 INFO L279 CegarLoopForPetriNet]: 186 programPoint places, -9 predicate places. [2022-07-21 08:51:00,969 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 165 transitions, 360 flow [2022-07-21 08:51:00,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:00,969 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:00,969 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:00,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 08:51:00,970 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:00,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:00,970 INFO L85 PathProgramCache]: Analyzing trace with hash -965032960, now seen corresponding path program 1 times [2022-07-21 08:51:00,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:00,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922151661] [2022-07-21 08:51:00,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:00,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:00,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:00,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:00,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922151661] [2022-07-21 08:51:00,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922151661] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:00,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911303074] [2022-07-21 08:51:00,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:00,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:00,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:00,996 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:00,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 08:51:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:01,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:01,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:01,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:01,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:01,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911303074] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:01,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:01,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:01,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618748171] [2022-07-21 08:51:01,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:01,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:01,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:01,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:01,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:01,120 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 205 [2022-07-21 08:51:01,121 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 165 transitions, 360 flow. Second operand has 10 states, 10 states have (on average 166.3) internal successors, (1663), 10 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:01,121 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:01,121 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 205 [2022-07-21 08:51:01,121 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:01,200 INFO L129 PetriNetUnfolder]: 0/208 cut-off events. [2022-07-21 08:51:01,200 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-21 08:51:01,200 INFO L84 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 208 events. 0/208 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 431 event pairs, 0 based on Foata normal form. 2/210 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-21 08:51:01,200 INFO L132 encePairwiseOnDemand]: 199/205 looper letters, 14 selfloop transitions, 9 changer transitions 0/175 dead transitions. [2022-07-21 08:51:01,200 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 175 transitions, 428 flow [2022-07-21 08:51:01,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:01,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:01,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1501 transitions. [2022-07-21 08:51:01,203 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.813550135501355 [2022-07-21 08:51:01,203 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1501 transitions. [2022-07-21 08:51:01,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1501 transitions. [2022-07-21 08:51:01,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:01,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1501 transitions. [2022-07-21 08:51:01,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 166.77777777777777) internal successors, (1501), 9 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:01,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 205.0) internal successors, (2050), 10 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:01,209 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 205.0) internal successors, (2050), 10 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:01,209 INFO L186 Difference]: Start difference. First operand has 177 places, 165 transitions, 360 flow. Second operand 9 states and 1501 transitions. [2022-07-21 08:51:01,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 175 transitions, 428 flow [2022-07-21 08:51:01,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 175 transitions, 426 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:01,212 INFO L242 Difference]: Finished difference. Result has 187 places, 171 transitions, 408 flow [2022-07-21 08:51:01,212 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=408, PETRI_PLACES=187, PETRI_TRANSITIONS=171} [2022-07-21 08:51:01,212 INFO L279 CegarLoopForPetriNet]: 186 programPoint places, 1 predicate places. [2022-07-21 08:51:01,212 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 171 transitions, 408 flow [2022-07-21 08:51:01,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 166.3) internal successors, (1663), 10 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:01,213 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:01,213 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] [2022-07-21 08:51:01,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:01,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:01,430 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:01,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:01,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1583364555, now seen corresponding path program 1 times [2022-07-21 08:51:01,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:01,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718887728] [2022-07-21 08:51:01,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:01,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:01,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:01,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:01,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718887728] [2022-07-21 08:51:01,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718887728] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:01,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858445517] [2022-07-21 08:51:01,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:01,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:01,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:01,500 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:01,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 08:51:01,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:01,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:51:01,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:01,624 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:01,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:01,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858445517] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:01,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:01,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:51:01,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718577402] [2022-07-21 08:51:01,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:01,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:51:01,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:01,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:51:01,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:51:01,703 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 205 [2022-07-21 08:51:01,705 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 171 transitions, 408 flow. Second operand has 18 states, 18 states have (on average 166.61111111111111) internal successors, (2999), 18 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:01,705 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:01,705 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 205 [2022-07-21 08:51:01,705 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:01,811 INFO L129 PetriNetUnfolder]: 0/182 cut-off events. [2022-07-21 08:51:01,811 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-07-21 08:51:01,811 INFO L84 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 182 events. 0/182 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 287 event pairs, 0 based on Foata normal form. 2/184 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-21 08:51:01,811 INFO L132 encePairwiseOnDemand]: 200/205 looper letters, 15 selfloop transitions, 13 changer transitions 0/168 dead transitions. [2022-07-21 08:51:01,811 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 168 transitions, 470 flow [2022-07-21 08:51:01,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 08:51:01,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-21 08:51:01,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2490 transitions. [2022-07-21 08:51:01,815 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8097560975609757 [2022-07-21 08:51:01,816 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2490 transitions. [2022-07-21 08:51:01,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2490 transitions. [2022-07-21 08:51:01,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:01,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2490 transitions. [2022-07-21 08:51:01,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 166.0) internal successors, (2490), 15 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:01,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 205.0) internal successors, (3280), 16 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:01,826 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 205.0) internal successors, (3280), 16 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:01,826 INFO L186 Difference]: Start difference. First operand has 187 places, 171 transitions, 408 flow. Second operand 15 states and 2490 transitions. [2022-07-21 08:51:01,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 168 transitions, 470 flow [2022-07-21 08:51:01,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 168 transitions, 453 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-07-21 08:51:01,829 INFO L242 Difference]: Finished difference. Result has 184 places, 161 transitions, 402 flow [2022-07-21 08:51:01,829 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=402, PETRI_PLACES=184, PETRI_TRANSITIONS=161} [2022-07-21 08:51:01,829 INFO L279 CegarLoopForPetriNet]: 186 programPoint places, -2 predicate places. [2022-07-21 08:51:01,829 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 161 transitions, 402 flow [2022-07-21 08:51:01,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 166.61111111111111) internal successors, (2999), 18 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:01,830 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:01,830 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:01,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:02,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-21 08:51:02,048 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:02,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:02,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1301575835, now seen corresponding path program 1 times [2022-07-21 08:51:02,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:02,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239127719] [2022-07-21 08:51:02,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:02,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:02,074 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:02,099 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:02,099 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:02,099 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:02,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:02,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 08:51:02,100 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-21 08:51:02,100 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:02,100 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-21 08:51:02,130 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:51:02,132 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 215 places, 238 transitions, 521 flow [2022-07-21 08:51:02,185 INFO L129 PetriNetUnfolder]: 54/428 cut-off events. [2022-07-21 08:51:02,185 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-21 08:51:02,206 INFO L84 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 428 events. 54/428 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1420 event pairs, 0 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 369. Up to 12 conditions per place. [2022-07-21 08:51:02,206 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 238 transitions, 521 flow [2022-07-21 08:51:02,209 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 215 places, 238 transitions, 521 flow [2022-07-21 08:51:02,210 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:02,210 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:51:02,210 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:02,214 INFO L129 PetriNetUnfolder]: 4/89 cut-off events. [2022-07-21 08:51:02,214 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:02,214 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:02,214 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] [2022-07-21 08:51:02,214 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:02,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:02,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1457129031, now seen corresponding path program 1 times [2022-07-21 08:51:02,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:02,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319228429] [2022-07-21 08:51:02,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:02,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:02,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:02,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:02,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:02,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319228429] [2022-07-21 08:51:02,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319228429] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:02,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:02,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:02,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430313314] [2022-07-21 08:51:02,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:02,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:02,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:02,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:02,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:02,278 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 238 [2022-07-21 08:51:02,278 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 238 transitions, 521 flow. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:02,279 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:02,279 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 238 [2022-07-21 08:51:02,279 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:02,355 INFO L129 PetriNetUnfolder]: 0/343 cut-off events. [2022-07-21 08:51:02,355 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-21 08:51:02,355 INFO L84 FinitePrefix]: Finished finitePrefix Result has 409 conditions, 343 events. 0/343 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1139 event pairs, 0 based on Foata normal form. 379/712 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-07-21 08:51:02,356 INFO L132 encePairwiseOnDemand]: 201/238 looper letters, 14 selfloop transitions, 2 changer transitions 12/207 dead transitions. [2022-07-21 08:51:02,356 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 207 transitions, 491 flow [2022-07-21 08:51:02,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:02,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:02,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2022-07-21 08:51:02,358 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8837535014005602 [2022-07-21 08:51:02,358 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2022-07-21 08:51:02,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2022-07-21 08:51:02,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:02,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2022-07-21 08:51:02,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:02,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:02,361 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:02,361 INFO L186 Difference]: Start difference. First operand has 215 places, 238 transitions, 521 flow. Second operand 3 states and 631 transitions. [2022-07-21 08:51:02,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 207 transitions, 491 flow [2022-07-21 08:51:02,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 207 transitions, 471 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:02,365 INFO L242 Difference]: Finished difference. Result has 217 places, 192 transitions, 419 flow [2022-07-21 08:51:02,365 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=419, PETRI_PLACES=217, PETRI_TRANSITIONS=192} [2022-07-21 08:51:02,366 INFO L279 CegarLoopForPetriNet]: 215 programPoint places, 2 predicate places. [2022-07-21 08:51:02,366 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 192 transitions, 419 flow [2022-07-21 08:51:02,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:02,366 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:02,366 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:02,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 08:51:02,367 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:02,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:02,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1797989088, now seen corresponding path program 1 times [2022-07-21 08:51:02,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:02,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315103270] [2022-07-21 08:51:02,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:02,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:02,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:02,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315103270] [2022-07-21 08:51:02,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315103270] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:02,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999821801] [2022-07-21 08:51:02,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:02,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:02,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:02,419 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:02,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 08:51:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:02,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:02,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:02,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:02,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:02,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999821801] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:02,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:02,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:02,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688480877] [2022-07-21 08:51:02,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:02,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:02,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:02,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:02,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:02,567 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 238 [2022-07-21 08:51:02,569 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 192 transitions, 419 flow. Second operand has 10 states, 10 states have (on average 192.3) internal successors, (1923), 10 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:02,569 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:02,569 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 238 [2022-07-21 08:51:02,569 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:02,643 INFO L129 PetriNetUnfolder]: 0/257 cut-off events. [2022-07-21 08:51:02,643 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-21 08:51:02,644 INFO L84 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 257 events. 0/257 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 613 event pairs, 0 based on Foata normal form. 2/259 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-21 08:51:02,644 INFO L132 encePairwiseOnDemand]: 232/238 looper letters, 15 selfloop transitions, 9 changer transitions 0/202 dead transitions. [2022-07-21 08:51:02,644 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 202 transitions, 489 flow [2022-07-21 08:51:02,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:02,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:02,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1736 transitions. [2022-07-21 08:51:02,647 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8104575163398693 [2022-07-21 08:51:02,647 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1736 transitions. [2022-07-21 08:51:02,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1736 transitions. [2022-07-21 08:51:02,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:02,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1736 transitions. [2022-07-21 08:51:02,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 192.88888888888889) internal successors, (1736), 9 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:02,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 238.0) internal successors, (2380), 10 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:02,672 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 238.0) internal successors, (2380), 10 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:02,673 INFO L186 Difference]: Start difference. First operand has 217 places, 192 transitions, 419 flow. Second operand 9 states and 1736 transitions. [2022-07-21 08:51:02,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 202 transitions, 489 flow [2022-07-21 08:51:02,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 202 transitions, 487 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:02,682 INFO L242 Difference]: Finished difference. Result has 215 places, 198 transitions, 467 flow [2022-07-21 08:51:02,682 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=204, 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=467, PETRI_PLACES=215, PETRI_TRANSITIONS=198} [2022-07-21 08:51:02,683 INFO L279 CegarLoopForPetriNet]: 215 programPoint places, 0 predicate places. [2022-07-21 08:51:02,683 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 198 transitions, 467 flow [2022-07-21 08:51:02,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 192.3) internal successors, (1923), 10 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:02,684 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:02,684 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] [2022-07-21 08:51:02,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:02,885 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 [2022-07-21 08:51:02,885 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:02,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:02,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1377325333, now seen corresponding path program 1 times [2022-07-21 08:51:02,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:02,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132785415] [2022-07-21 08:51:02,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:02,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:02,941 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:02,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:02,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132785415] [2022-07-21 08:51:02,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132785415] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:02,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592590441] [2022-07-21 08:51:02,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:02,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:02,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:02,956 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:02,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 08:51:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:03,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:51:03,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:03,084 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:03,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:03,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592590441] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:03,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:03,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:51:03,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671978406] [2022-07-21 08:51:03,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:03,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:51:03,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:03,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:51:03,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:51:03,164 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 238 [2022-07-21 08:51:03,166 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 198 transitions, 467 flow. Second operand has 18 states, 18 states have (on average 192.61111111111111) internal successors, (3467), 18 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:03,167 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:03,167 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 238 [2022-07-21 08:51:03,167 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:03,299 INFO L129 PetriNetUnfolder]: 0/218 cut-off events. [2022-07-21 08:51:03,299 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-07-21 08:51:03,299 INFO L84 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 218 events. 0/218 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 385 event pairs, 0 based on Foata normal form. 3/221 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-21 08:51:03,299 INFO L132 encePairwiseOnDemand]: 233/238 looper letters, 18 selfloop transitions, 16 changer transitions 0/200 dead transitions. [2022-07-21 08:51:03,299 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 200 transitions, 565 flow [2022-07-21 08:51:03,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 08:51:03,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-21 08:51:03,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3457 transitions. [2022-07-21 08:51:03,304 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8069561157796452 [2022-07-21 08:51:03,304 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3457 transitions. [2022-07-21 08:51:03,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3457 transitions. [2022-07-21 08:51:03,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:03,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3457 transitions. [2022-07-21 08:51:03,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 192.05555555555554) internal successors, (3457), 18 states have internal predecessors, (3457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:03,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 238.0) internal successors, (4522), 19 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:03,315 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 238.0) internal successors, (4522), 19 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:03,315 INFO L186 Difference]: Start difference. First operand has 215 places, 198 transitions, 467 flow. Second operand 18 states and 3457 transitions. [2022-07-21 08:51:03,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 200 transitions, 565 flow [2022-07-21 08:51:03,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 200 transitions, 544 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-07-21 08:51:03,319 INFO L242 Difference]: Finished difference. Result has 215 places, 191 transitions, 480 flow [2022-07-21 08:51:03,319 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=480, PETRI_PLACES=215, PETRI_TRANSITIONS=191} [2022-07-21 08:51:03,319 INFO L279 CegarLoopForPetriNet]: 215 programPoint places, 0 predicate places. [2022-07-21 08:51:03,319 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 191 transitions, 480 flow [2022-07-21 08:51:03,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 192.61111111111111) internal successors, (3467), 18 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:03,320 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:03,320 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:03,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:03,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:03,541 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:03,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:03,541 INFO L85 PathProgramCache]: Analyzing trace with hash -544530782, now seen corresponding path program 1 times [2022-07-21 08:51:03,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:03,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318734763] [2022-07-21 08:51:03,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:03,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:03,553 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:03,580 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:03,581 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:03,581 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:03,581 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:03,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-21 08:51:03,581 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-21 08:51:03,581 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:03,581 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-21 08:51:03,598 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:51:03,600 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 244 places, 271 transitions, 602 flow [2022-07-21 08:51:03,647 INFO L129 PetriNetUnfolder]: 64/500 cut-off events. [2022-07-21 08:51:03,647 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-21 08:51:03,654 INFO L84 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 500 events. 64/500 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1726 event pairs, 0 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 447. Up to 14 conditions per place. [2022-07-21 08:51:03,654 INFO L82 GeneralOperation]: Start removeDead. Operand has 244 places, 271 transitions, 602 flow [2022-07-21 08:51:03,658 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 244 places, 271 transitions, 602 flow [2022-07-21 08:51:03,659 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:03,659 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:51:03,659 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:03,662 INFO L129 PetriNetUnfolder]: 5/94 cut-off events. [2022-07-21 08:51:03,662 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:03,663 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:03,663 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] [2022-07-21 08:51:03,663 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:03,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:03,663 INFO L85 PathProgramCache]: Analyzing trace with hash 506591591, now seen corresponding path program 1 times [2022-07-21 08:51:03,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:03,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210892711] [2022-07-21 08:51:03,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:03,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:03,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:03,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:03,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:03,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210892711] [2022-07-21 08:51:03,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210892711] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:03,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:03,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:03,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897276616] [2022-07-21 08:51:03,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:03,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:03,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:03,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:03,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:03,676 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 271 [2022-07-21 08:51:03,677 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 271 transitions, 602 flow. Second operand has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:03,677 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:03,677 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 271 [2022-07-21 08:51:03,677 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:03,736 INFO L129 PetriNetUnfolder]: 0/404 cut-off events. [2022-07-21 08:51:03,737 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-21 08:51:03,737 INFO L84 FinitePrefix]: Finished finitePrefix Result has 485 conditions, 404 events. 0/404 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1410 event pairs, 0 based on Foata normal form. 558/950 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-07-21 08:51:03,737 INFO L132 encePairwiseOnDemand]: 228/271 looper letters, 15 selfloop transitions, 2 changer transitions 12/234 dead transitions. [2022-07-21 08:51:03,738 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 234 transitions, 562 flow [2022-07-21 08:51:03,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:03,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:03,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 716 transitions. [2022-07-21 08:51:03,754 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8806888068880688 [2022-07-21 08:51:03,754 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 716 transitions. [2022-07-21 08:51:03,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 716 transitions. [2022-07-21 08:51:03,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:03,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 716 transitions. [2022-07-21 08:51:03,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:03,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:03,756 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:03,756 INFO L186 Difference]: Start difference. First operand has 244 places, 271 transitions, 602 flow. Second operand 3 states and 716 transitions. [2022-07-21 08:51:03,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 234 transitions, 562 flow [2022-07-21 08:51:03,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 234 transitions, 532 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:03,760 INFO L242 Difference]: Finished difference. Result has 246 places, 219 transitions, 478 flow [2022-07-21 08:51:03,760 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=478, PETRI_PLACES=246, PETRI_TRANSITIONS=219} [2022-07-21 08:51:03,760 INFO L279 CegarLoopForPetriNet]: 244 programPoint places, 2 predicate places. [2022-07-21 08:51:03,760 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 219 transitions, 478 flow [2022-07-21 08:51:03,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:03,761 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:03,761 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:03,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-21 08:51:03,761 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:03,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:03,761 INFO L85 PathProgramCache]: Analyzing trace with hash 639539648, now seen corresponding path program 1 times [2022-07-21 08:51:03,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:03,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546674366] [2022-07-21 08:51:03,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:03,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:03,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:03,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546674366] [2022-07-21 08:51:03,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546674366] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:03,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882677074] [2022-07-21 08:51:03,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:03,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:03,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:03,784 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:03,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 08:51:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:03,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:03,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:03,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:03,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:03,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882677074] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:03,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:03,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:03,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816792812] [2022-07-21 08:51:03,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:03,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:03,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:03,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:03,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:03,902 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 271 [2022-07-21 08:51:03,903 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 219 transitions, 478 flow. Second operand has 10 states, 10 states have (on average 218.3) internal successors, (2183), 10 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:03,903 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:03,903 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 271 [2022-07-21 08:51:03,903 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:03,989 INFO L129 PetriNetUnfolder]: 0/306 cut-off events. [2022-07-21 08:51:03,989 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-21 08:51:03,989 INFO L84 FinitePrefix]: Finished finitePrefix Result has 390 conditions, 306 events. 0/306 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 798 event pairs, 0 based on Foata normal form. 2/308 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-21 08:51:03,990 INFO L132 encePairwiseOnDemand]: 265/271 looper letters, 16 selfloop transitions, 9 changer transitions 0/229 dead transitions. [2022-07-21 08:51:03,990 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 229 transitions, 550 flow [2022-07-21 08:51:03,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:03,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:03,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1971 transitions. [2022-07-21 08:51:03,993 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8081180811808119 [2022-07-21 08:51:03,993 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1971 transitions. [2022-07-21 08:51:03,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1971 transitions. [2022-07-21 08:51:03,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:03,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1971 transitions. [2022-07-21 08:51:03,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 219.0) internal successors, (1971), 9 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:03,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 271.0) internal successors, (2710), 10 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:03,999 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 271.0) internal successors, (2710), 10 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:03,999 INFO L186 Difference]: Start difference. First operand has 246 places, 219 transitions, 478 flow. Second operand 9 states and 1971 transitions. [2022-07-21 08:51:03,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 229 transitions, 550 flow [2022-07-21 08:51:04,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 229 transitions, 548 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:04,002 INFO L242 Difference]: Finished difference. Result has 244 places, 225 transitions, 526 flow [2022-07-21 08:51:04,003 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=526, PETRI_PLACES=244, PETRI_TRANSITIONS=225} [2022-07-21 08:51:04,003 INFO L279 CegarLoopForPetriNet]: 244 programPoint places, 0 predicate places. [2022-07-21 08:51:04,003 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 225 transitions, 526 flow [2022-07-21 08:51:04,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 218.3) internal successors, (2183), 10 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:04,003 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:04,003 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] [2022-07-21 08:51:04,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:04,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:04,221 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:04,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:04,221 INFO L85 PathProgramCache]: Analyzing trace with hash -2089549643, now seen corresponding path program 1 times [2022-07-21 08:51:04,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:04,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128523946] [2022-07-21 08:51:04,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:04,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:04,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:04,286 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:04,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:04,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128523946] [2022-07-21 08:51:04,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128523946] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:04,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950983784] [2022-07-21 08:51:04,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:04,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:04,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:04,288 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:04,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 08:51:04,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:04,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:51:04,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:04,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:04,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950983784] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:04,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:04,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:51:04,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148386903] [2022-07-21 08:51:04,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:04,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:51:04,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:04,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:51:04,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:51:04,495 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 271 [2022-07-21 08:51:04,497 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 225 transitions, 526 flow. Second operand has 18 states, 18 states have (on average 218.61111111111111) internal successors, (3935), 18 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:04,497 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:04,497 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 271 [2022-07-21 08:51:04,497 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:04,660 INFO L129 PetriNetUnfolder]: 0/254 cut-off events. [2022-07-21 08:51:04,660 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-21 08:51:04,660 INFO L84 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 254 events. 0/254 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 483 event pairs, 0 based on Foata normal form. 4/258 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-07-21 08:51:04,661 INFO L132 encePairwiseOnDemand]: 266/271 looper letters, 21 selfloop transitions, 19 changer transitions 0/232 dead transitions. [2022-07-21 08:51:04,661 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 232 transitions, 660 flow [2022-07-21 08:51:04,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:51:04,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:51:04,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4580 transitions. [2022-07-21 08:51:04,665 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8047794763661922 [2022-07-21 08:51:04,665 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4580 transitions. [2022-07-21 08:51:04,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4580 transitions. [2022-07-21 08:51:04,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:04,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4580 transitions. [2022-07-21 08:51:04,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 218.0952380952381) internal successors, (4580), 21 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:04,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 271.0) internal successors, (5962), 22 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:04,676 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 271.0) internal successors, (5962), 22 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:04,676 INFO L186 Difference]: Start difference. First operand has 244 places, 225 transitions, 526 flow. Second operand 21 states and 4580 transitions. [2022-07-21 08:51:04,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 232 transitions, 660 flow [2022-07-21 08:51:04,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 232 transitions, 635 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-07-21 08:51:04,680 INFO L242 Difference]: Finished difference. Result has 247 places, 221 transitions, 558 flow [2022-07-21 08:51:04,680 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=558, PETRI_PLACES=247, PETRI_TRANSITIONS=221} [2022-07-21 08:51:04,681 INFO L279 CegarLoopForPetriNet]: 244 programPoint places, 3 predicate places. [2022-07-21 08:51:04,681 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 221 transitions, 558 flow [2022-07-21 08:51:04,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 218.61111111111111) internal successors, (3935), 18 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:04,681 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:04,681 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:04,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-21 08:51:04,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-21 08:51:04,912 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:04,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:04,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1513194560, now seen corresponding path program 1 times [2022-07-21 08:51:04,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:04,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889551123] [2022-07-21 08:51:04,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:04,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:04,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:04,926 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:04,941 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:04,941 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:04,941 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:04,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:04,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-21 08:51:04,942 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-21 08:51:04,942 WARN L231 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:04,942 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-07-21 08:51:04,957 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:51:04,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 273 places, 304 transitions, 685 flow [2022-07-21 08:51:05,015 INFO L129 PetriNetUnfolder]: 74/572 cut-off events. [2022-07-21 08:51:05,015 INFO L130 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-07-21 08:51:05,023 INFO L84 FinitePrefix]: Finished finitePrefix Result has 622 conditions, 572 events. 74/572 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2005 event pairs, 0 based on Foata normal form. 0/482 useless extension candidates. Maximal degree in co-relation 526. Up to 16 conditions per place. [2022-07-21 08:51:05,024 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 304 transitions, 685 flow [2022-07-21 08:51:05,048 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 273 places, 304 transitions, 685 flow [2022-07-21 08:51:05,049 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:05,049 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:51:05,049 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:05,052 INFO L129 PetriNetUnfolder]: 5/90 cut-off events. [2022-07-21 08:51:05,052 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:05,053 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:05,053 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] [2022-07-21 08:51:05,053 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:05,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:05,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1294590823, now seen corresponding path program 1 times [2022-07-21 08:51:05,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:05,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086217548] [2022-07-21 08:51:05,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:05,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:05,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:05,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:05,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086217548] [2022-07-21 08:51:05,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086217548] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:05,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:05,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:05,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981279552] [2022-07-21 08:51:05,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:05,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:05,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:05,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:05,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:05,076 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 304 [2022-07-21 08:51:05,076 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 304 transitions, 685 flow. Second operand has 3 states, 3 states have (on average 244.0) internal successors, (732), 3 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:05,077 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:05,077 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 304 [2022-07-21 08:51:05,077 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:05,150 INFO L129 PetriNetUnfolder]: 0/465 cut-off events. [2022-07-21 08:51:05,150 INFO L130 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-07-21 08:51:05,150 INFO L84 FinitePrefix]: Finished finitePrefix Result has 562 conditions, 465 events. 0/465 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1687 event pairs, 0 based on Foata normal form. 773/1224 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-07-21 08:51:05,151 INFO L132 encePairwiseOnDemand]: 255/304 looper letters, 16 selfloop transitions, 2 changer transitions 12/261 dead transitions. [2022-07-21 08:51:05,151 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 261 transitions, 635 flow [2022-07-21 08:51:05,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:05,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:05,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 801 transitions. [2022-07-21 08:51:05,153 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8782894736842105 [2022-07-21 08:51:05,153 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 801 transitions. [2022-07-21 08:51:05,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 801 transitions. [2022-07-21 08:51:05,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:05,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 801 transitions. [2022-07-21 08:51:05,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:05,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:05,157 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:05,157 INFO L186 Difference]: Start difference. First operand has 273 places, 304 transitions, 685 flow. Second operand 3 states and 801 transitions. [2022-07-21 08:51:05,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 261 transitions, 635 flow [2022-07-21 08:51:05,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 261 transitions, 593 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:05,161 INFO L242 Difference]: Finished difference. Result has 275 places, 246 transitions, 537 flow [2022-07-21 08:51:05,161 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=537, PETRI_PLACES=275, PETRI_TRANSITIONS=246} [2022-07-21 08:51:05,161 INFO L279 CegarLoopForPetriNet]: 273 programPoint places, 2 predicate places. [2022-07-21 08:51:05,161 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 246 transitions, 537 flow [2022-07-21 08:51:05,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 244.0) internal successors, (732), 3 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:05,162 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:05,162 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:05,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-21 08:51:05,163 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:05,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:05,163 INFO L85 PathProgramCache]: Analyzing trace with hash 2052585952, now seen corresponding path program 1 times [2022-07-21 08:51:05,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:05,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703822494] [2022-07-21 08:51:05,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:05,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:05,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:05,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:05,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:05,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703822494] [2022-07-21 08:51:05,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703822494] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:05,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649055884] [2022-07-21 08:51:05,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:05,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:05,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:05,204 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:05,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 08:51:05,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:05,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:05,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:05,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:05,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:05,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:05,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649055884] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:05,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:05,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:05,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775648361] [2022-07-21 08:51:05,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:05,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:05,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:05,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:05,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:05,342 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 304 [2022-07-21 08:51:05,343 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 246 transitions, 537 flow. Second operand has 10 states, 10 states have (on average 244.3) internal successors, (2443), 10 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:05,343 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:05,344 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 304 [2022-07-21 08:51:05,344 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:05,454 INFO L129 PetriNetUnfolder]: 0/355 cut-off events. [2022-07-21 08:51:05,454 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-07-21 08:51:05,454 INFO L84 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 355 events. 0/355 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 979 event pairs, 0 based on Foata normal form. 2/357 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-07-21 08:51:05,455 INFO L132 encePairwiseOnDemand]: 298/304 looper letters, 17 selfloop transitions, 9 changer transitions 0/256 dead transitions. [2022-07-21 08:51:05,455 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 256 transitions, 611 flow [2022-07-21 08:51:05,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:05,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:05,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2206 transitions. [2022-07-21 08:51:05,457 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8062865497076024 [2022-07-21 08:51:05,457 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2206 transitions. [2022-07-21 08:51:05,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2206 transitions. [2022-07-21 08:51:05,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:05,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2206 transitions. [2022-07-21 08:51:05,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 245.11111111111111) internal successors, (2206), 9 states have internal predecessors, (2206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:05,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 304.0) internal successors, (3040), 10 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:05,463 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 304.0) internal successors, (3040), 10 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:05,463 INFO L186 Difference]: Start difference. First operand has 275 places, 246 transitions, 537 flow. Second operand 9 states and 2206 transitions. [2022-07-21 08:51:05,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 256 transitions, 611 flow [2022-07-21 08:51:05,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 256 transitions, 609 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:05,466 INFO L242 Difference]: Finished difference. Result has 273 places, 252 transitions, 585 flow [2022-07-21 08:51:05,467 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=585, PETRI_PLACES=273, PETRI_TRANSITIONS=252} [2022-07-21 08:51:05,467 INFO L279 CegarLoopForPetriNet]: 273 programPoint places, 0 predicate places. [2022-07-21 08:51:05,467 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 252 transitions, 585 flow [2022-07-21 08:51:05,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 244.3) internal successors, (2443), 10 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:05,468 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:05,468 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] [2022-07-21 08:51:05,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:05,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-21 08:51:05,684 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:05,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:05,684 INFO L85 PathProgramCache]: Analyzing trace with hash 900912405, now seen corresponding path program 1 times [2022-07-21 08:51:05,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:05,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897367660] [2022-07-21 08:51:05,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:05,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:05,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:05,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897367660] [2022-07-21 08:51:05,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897367660] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:05,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340607891] [2022-07-21 08:51:05,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:05,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:05,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:05,748 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:05,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 08:51:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:05,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:51:05,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:05,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:05,966 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:05,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340607891] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:05,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:05,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:51:05,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979417345] [2022-07-21 08:51:05,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:05,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:51:05,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:05,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:51:05,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:51:05,969 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 304 [2022-07-21 08:51:05,971 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 252 transitions, 585 flow. Second operand has 18 states, 18 states have (on average 244.61111111111111) internal successors, (4403), 18 states have internal predecessors, (4403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:05,972 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:05,972 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 304 [2022-07-21 08:51:05,972 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:06,145 INFO L129 PetriNetUnfolder]: 0/303 cut-off events. [2022-07-21 08:51:06,145 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-07-21 08:51:06,146 INFO L84 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 303 events. 0/303 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 639 event pairs, 0 based on Foata normal form. 4/307 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-21 08:51:06,146 INFO L132 encePairwiseOnDemand]: 298/304 looper letters, 25 selfloop transitions, 21 changer transitions 0/276 dead transitions. [2022-07-21 08:51:06,146 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 276 transitions, 785 flow [2022-07-21 08:51:06,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:51:06,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:51:06,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5132 transitions. [2022-07-21 08:51:06,150 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8038847117794486 [2022-07-21 08:51:06,150 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5132 transitions. [2022-07-21 08:51:06,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5132 transitions. [2022-07-21 08:51:06,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:06,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5132 transitions. [2022-07-21 08:51:06,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 244.38095238095238) internal successors, (5132), 21 states have internal predecessors, (5132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:06,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 304.0) internal successors, (6688), 22 states have internal predecessors, (6688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:06,162 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 304.0) internal successors, (6688), 22 states have internal predecessors, (6688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:06,162 INFO L186 Difference]: Start difference. First operand has 273 places, 252 transitions, 585 flow. Second operand 21 states and 5132 transitions. [2022-07-21 08:51:06,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 276 transitions, 785 flow [2022-07-21 08:51:06,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 276 transitions, 771 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:06,167 INFO L242 Difference]: Finished difference. Result has 297 places, 265 transitions, 709 flow [2022-07-21 08:51:06,167 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=709, PETRI_PLACES=297, PETRI_TRANSITIONS=265} [2022-07-21 08:51:06,167 INFO L279 CegarLoopForPetriNet]: 273 programPoint places, 24 predicate places. [2022-07-21 08:51:06,168 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 265 transitions, 709 flow [2022-07-21 08:51:06,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 244.61111111111111) internal successors, (4403), 18 states have internal predecessors, (4403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:06,169 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:06,169 INFO L200 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:06,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:06,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-21 08:51:06,384 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:06,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:06,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1779148577, now seen corresponding path program 1 times [2022-07-21 08:51:06,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:06,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010225358] [2022-07-21 08:51:06,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:06,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:06,418 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:06,434 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:06,434 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:06,434 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:06,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:06,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-21 08:51:06,435 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-21 08:51:06,435 WARN L231 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:06,435 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-07-21 08:51:06,451 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:51:06,453 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 302 places, 337 transitions, 770 flow [2022-07-21 08:51:06,524 INFO L129 PetriNetUnfolder]: 84/644 cut-off events. [2022-07-21 08:51:06,524 INFO L130 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-07-21 08:51:06,536 INFO L84 FinitePrefix]: Finished finitePrefix Result has 705 conditions, 644 events. 84/644 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2266 event pairs, 0 based on Foata normal form. 0/542 useless extension candidates. Maximal degree in co-relation 606. Up to 18 conditions per place. [2022-07-21 08:51:06,536 INFO L82 GeneralOperation]: Start removeDead. Operand has 302 places, 337 transitions, 770 flow [2022-07-21 08:51:06,542 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 302 places, 337 transitions, 770 flow [2022-07-21 08:51:06,543 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:06,543 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:51:06,543 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:06,546 INFO L129 PetriNetUnfolder]: 5/93 cut-off events. [2022-07-21 08:51:06,546 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:06,546 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:06,546 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] [2022-07-21 08:51:06,547 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:06,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:06,547 INFO L85 PathProgramCache]: Analyzing trace with hash -180437562, now seen corresponding path program 1 times [2022-07-21 08:51:06,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:06,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806255135] [2022-07-21 08:51:06,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:06,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:06,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:06,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:06,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806255135] [2022-07-21 08:51:06,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806255135] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:06,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:06,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:51:06,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330042806] [2022-07-21 08:51:06,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:06,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:51:06,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:06,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:51:06,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:51:06,559 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 337 [2022-07-21 08:51:06,559 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 337 transitions, 770 flow. Second operand has 2 states, 2 states have (on average 276.5) internal successors, (553), 2 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:06,559 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:06,560 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 337 [2022-07-21 08:51:06,560 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:06,658 INFO L129 PetriNetUnfolder]: 0/551 cut-off events. [2022-07-21 08:51:06,658 INFO L130 PetriNetUnfolder]: For 148/148 co-relation queries the response was YES. [2022-07-21 08:51:06,659 INFO L84 FinitePrefix]: Finished finitePrefix Result has 621 conditions, 551 events. 0/551 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2092 event pairs, 0 based on Foata normal form. 212/745 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-07-21 08:51:06,659 INFO L132 encePairwiseOnDemand]: 285/337 looper letters, 8 selfloop transitions, 0 changer transitions 12/284 dead transitions. [2022-07-21 08:51:06,660 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 284 transitions, 680 flow [2022-07-21 08:51:06,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:51:06,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:51:06,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 612 transitions. [2022-07-21 08:51:06,661 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9080118694362018 [2022-07-21 08:51:06,661 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 612 transitions. [2022-07-21 08:51:06,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 612 transitions. [2022-07-21 08:51:06,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:06,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 612 transitions. [2022-07-21 08:51:06,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 306.0) internal successors, (612), 2 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:06,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 337.0) internal successors, (1011), 3 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:06,663 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 337.0) internal successors, (1011), 3 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:06,663 INFO L186 Difference]: Start difference. First operand has 302 places, 337 transitions, 770 flow. Second operand 2 states and 612 transitions. [2022-07-21 08:51:06,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 284 transitions, 680 flow [2022-07-21 08:51:06,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 284 transitions, 624 flow, removed 28 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:06,666 INFO L242 Difference]: Finished difference. Result has 302 places, 272 transitions, 584 flow [2022-07-21 08:51:06,666 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=584, PETRI_PLACES=302, PETRI_TRANSITIONS=272} [2022-07-21 08:51:06,667 INFO L279 CegarLoopForPetriNet]: 302 programPoint places, 0 predicate places. [2022-07-21 08:51:06,667 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 272 transitions, 584 flow [2022-07-21 08:51:06,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 276.5) internal successors, (553), 2 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:06,667 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:06,667 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] [2022-07-21 08:51:06,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-21 08:51:06,667 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:06,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:06,668 INFO L85 PathProgramCache]: Analyzing trace with hash -473840569, now seen corresponding path program 1 times [2022-07-21 08:51:06,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:06,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980681775] [2022-07-21 08:51:06,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:06,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:06,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:06,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:06,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980681775] [2022-07-21 08:51:06,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980681775] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:06,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:06,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:06,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882072542] [2022-07-21 08:51:06,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:06,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:06,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:06,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:06,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:06,685 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 337 [2022-07-21 08:51:06,685 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 272 transitions, 584 flow. Second operand has 3 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:06,685 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:06,685 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 337 [2022-07-21 08:51:06,686 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:06,764 INFO L129 PetriNetUnfolder]: 0/430 cut-off events. [2022-07-21 08:51:06,764 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-21 08:51:06,765 INFO L84 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 430 events. 0/430 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1318 event pairs, 0 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2022-07-21 08:51:06,765 INFO L132 encePairwiseOnDemand]: 334/337 looper letters, 17 selfloop transitions, 2 changer transitions 0/276 dead transitions. [2022-07-21 08:51:06,766 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 276 transitions, 630 flow [2022-07-21 08:51:06,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:06,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:06,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 827 transitions. [2022-07-21 08:51:06,767 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8180019782393669 [2022-07-21 08:51:06,767 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 827 transitions. [2022-07-21 08:51:06,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 827 transitions. [2022-07-21 08:51:06,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:06,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 827 transitions. [2022-07-21 08:51:06,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:06,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:06,769 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:06,769 INFO L186 Difference]: Start difference. First operand has 302 places, 272 transitions, 584 flow. Second operand 3 states and 827 transitions. [2022-07-21 08:51:06,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 276 transitions, 630 flow [2022-07-21 08:51:06,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 276 transitions, 630 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:06,772 INFO L242 Difference]: Finished difference. Result has 293 places, 273 transitions, 596 flow [2022-07-21 08:51:06,773 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=596, PETRI_PLACES=293, PETRI_TRANSITIONS=273} [2022-07-21 08:51:06,773 INFO L279 CegarLoopForPetriNet]: 302 programPoint places, -9 predicate places. [2022-07-21 08:51:06,773 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 273 transitions, 596 flow [2022-07-21 08:51:06,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:06,773 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:06,773 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:06,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-21 08:51:06,774 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:06,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:06,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1853817472, now seen corresponding path program 1 times [2022-07-21 08:51:06,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:06,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129744226] [2022-07-21 08:51:06,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:06,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:06,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:06,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:06,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:06,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129744226] [2022-07-21 08:51:06,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129744226] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:06,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680989871] [2022-07-21 08:51:06,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:06,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:06,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:06,812 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:06,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 08:51:06,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:06,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:06,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:06,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:06,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680989871] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:06,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:06,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:06,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423038176] [2022-07-21 08:51:06,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:06,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:06,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:06,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:06,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:06,991 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 337 [2022-07-21 08:51:06,993 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 273 transitions, 596 flow. Second operand has 10 states, 10 states have (on average 270.3) internal successors, (2703), 10 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:06,993 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:06,993 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 337 [2022-07-21 08:51:06,993 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:07,121 INFO L129 PetriNetUnfolder]: 0/404 cut-off events. [2022-07-21 08:51:07,122 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-21 08:51:07,122 INFO L84 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 404 events. 0/404 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1169 event pairs, 0 based on Foata normal form. 2/406 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-07-21 08:51:07,123 INFO L132 encePairwiseOnDemand]: 331/337 looper letters, 18 selfloop transitions, 9 changer transitions 0/283 dead transitions. [2022-07-21 08:51:07,123 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 283 transitions, 672 flow [2022-07-21 08:51:07,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:07,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:07,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2441 transitions. [2022-07-21 08:51:07,125 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8048137157929443 [2022-07-21 08:51:07,125 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2441 transitions. [2022-07-21 08:51:07,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2441 transitions. [2022-07-21 08:51:07,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:07,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2441 transitions. [2022-07-21 08:51:07,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 271.22222222222223) internal successors, (2441), 9 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:07,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 337.0) internal successors, (3370), 10 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:07,131 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 337.0) internal successors, (3370), 10 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:07,131 INFO L186 Difference]: Start difference. First operand has 293 places, 273 transitions, 596 flow. Second operand 9 states and 2441 transitions. [2022-07-21 08:51:07,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 283 transitions, 672 flow [2022-07-21 08:51:07,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 283 transitions, 670 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:07,135 INFO L242 Difference]: Finished difference. Result has 303 places, 279 transitions, 644 flow [2022-07-21 08:51:07,135 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=644, PETRI_PLACES=303, PETRI_TRANSITIONS=279} [2022-07-21 08:51:07,135 INFO L279 CegarLoopForPetriNet]: 302 programPoint places, 1 predicate places. [2022-07-21 08:51:07,136 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 279 transitions, 644 flow [2022-07-21 08:51:07,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 270.3) internal successors, (2703), 10 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:07,136 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:07,136 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] [2022-07-21 08:51:07,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-21 08:51:07,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-21 08:51:07,362 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:07,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:07,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1758776885, now seen corresponding path program 1 times [2022-07-21 08:51:07,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:07,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081129631] [2022-07-21 08:51:07,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:07,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:07,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:07,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:07,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081129631] [2022-07-21 08:51:07,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081129631] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:07,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803191985] [2022-07-21 08:51:07,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:07,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:07,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:07,410 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:07,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 08:51:07,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:07,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:51:07,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:07,552 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:07,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:07,634 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:07,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803191985] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:07,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:07,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:51:07,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951741700] [2022-07-21 08:51:07,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:07,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:51:07,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:07,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:51:07,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:51:07,638 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 337 [2022-07-21 08:51:07,640 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 279 transitions, 644 flow. Second operand has 18 states, 18 states have (on average 270.6111111111111) internal successors, (4871), 18 states have internal predecessors, (4871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:07,640 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:07,641 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 337 [2022-07-21 08:51:07,641 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:07,829 INFO L129 PetriNetUnfolder]: 0/352 cut-off events. [2022-07-21 08:51:07,829 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-07-21 08:51:07,829 INFO L84 FinitePrefix]: Finished finitePrefix Result has 508 conditions, 352 events. 0/352 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 822 event pairs, 0 based on Foata normal form. 4/356 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-07-21 08:51:07,830 INFO L132 encePairwiseOnDemand]: 331/337 looper letters, 26 selfloop transitions, 21 changer transitions 0/303 dead transitions. [2022-07-21 08:51:07,830 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 303 transitions, 846 flow [2022-07-21 08:51:07,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:51:07,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:51:07,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5679 transitions. [2022-07-21 08:51:07,834 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8024586689275116 [2022-07-21 08:51:07,834 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5679 transitions. [2022-07-21 08:51:07,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5679 transitions. [2022-07-21 08:51:07,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:07,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5679 transitions. [2022-07-21 08:51:07,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 270.42857142857144) internal successors, (5679), 21 states have internal predecessors, (5679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:07,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 337.0) internal successors, (7414), 22 states have internal predecessors, (7414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:07,845 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 337.0) internal successors, (7414), 22 states have internal predecessors, (7414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:07,845 INFO L186 Difference]: Start difference. First operand has 303 places, 279 transitions, 644 flow. Second operand 21 states and 5679 transitions. [2022-07-21 08:51:07,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 303 transitions, 846 flow [2022-07-21 08:51:07,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 303 transitions, 832 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:07,850 INFO L242 Difference]: Finished difference. Result has 327 places, 292 transitions, 768 flow [2022-07-21 08:51:07,850 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=768, PETRI_PLACES=327, PETRI_TRANSITIONS=292} [2022-07-21 08:51:07,850 INFO L279 CegarLoopForPetriNet]: 302 programPoint places, 25 predicate places. [2022-07-21 08:51:07,850 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 292 transitions, 768 flow [2022-07-21 08:51:07,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 270.6111111111111) internal successors, (4871), 18 states have internal predecessors, (4871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:07,851 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:07,851 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:07,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:08,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-21 08:51:08,071 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:08,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:08,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1304864171, now seen corresponding path program 1 times [2022-07-21 08:51:08,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:08,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904741126] [2022-07-21 08:51:08,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:08,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:08,224 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:08,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:08,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904741126] [2022-07-21 08:51:08,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904741126] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:08,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290283836] [2022-07-21 08:51:08,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:08,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:08,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:08,239 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:08,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 08:51:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:08,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:51:08,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:08,455 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:08,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:08,701 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:08,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290283836] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:08,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:08,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:51:08,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439069104] [2022-07-21 08:51:08,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:08,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:51:08,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:08,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:51:08,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:51:08,707 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 337 [2022-07-21 08:51:08,711 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 292 transitions, 768 flow. Second operand has 34 states, 34 states have (on average 270.79411764705884) internal successors, (9207), 34 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:08,711 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:08,711 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 337 [2022-07-21 08:51:08,711 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:08,970 INFO L129 PetriNetUnfolder]: 0/326 cut-off events. [2022-07-21 08:51:08,970 INFO L130 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-07-21 08:51:08,970 INFO L84 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 326 events. 0/326 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 679 event pairs, 0 based on Foata normal form. 2/328 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-07-21 08:51:08,971 INFO L132 encePairwiseOnDemand]: 332/337 looper letters, 27 selfloop transitions, 25 changer transitions 0/296 dead transitions. [2022-07-21 08:51:08,971 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 296 transitions, 912 flow [2022-07-21 08:51:08,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 08:51:08,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-21 08:51:08,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7290 transitions. [2022-07-21 08:51:08,976 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8011869436201781 [2022-07-21 08:51:08,976 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7290 transitions. [2022-07-21 08:51:08,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7290 transitions. [2022-07-21 08:51:08,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:08,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7290 transitions. [2022-07-21 08:51:08,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 270.0) internal successors, (7290), 27 states have internal predecessors, (7290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:08,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 337.0) internal successors, (9436), 28 states have internal predecessors, (9436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:08,990 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 337.0) internal successors, (9436), 28 states have internal predecessors, (9436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:08,990 INFO L186 Difference]: Start difference. First operand has 327 places, 292 transitions, 768 flow. Second operand 27 states and 7290 transitions. [2022-07-21 08:51:08,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 296 transitions, 912 flow [2022-07-21 08:51:08,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 296 transitions, 858 flow, removed 7 selfloop flow, removed 13 redundant places. [2022-07-21 08:51:08,995 INFO L242 Difference]: Finished difference. Result has 327 places, 282 transitions, 751 flow [2022-07-21 08:51:08,995 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=751, PETRI_PLACES=327, PETRI_TRANSITIONS=282} [2022-07-21 08:51:08,995 INFO L279 CegarLoopForPetriNet]: 302 programPoint places, 25 predicate places. [2022-07-21 08:51:08,995 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 282 transitions, 751 flow [2022-07-21 08:51:08,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 270.79411764705884) internal successors, (9207), 34 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:08,997 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:08,997 INFO L200 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:09,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-21 08:51:09,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-21 08:51:09,211 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:09,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:09,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1236984545, now seen corresponding path program 1 times [2022-07-21 08:51:09,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:09,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118514242] [2022-07-21 08:51:09,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:09,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:09,235 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:09,264 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:09,264 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:09,264 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:09,264 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:09,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-21 08:51:09,264 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 08:51:09,265 WARN L231 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:09,265 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-07-21 08:51:09,292 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:51:09,294 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 331 places, 370 transitions, 857 flow [2022-07-21 08:51:09,377 INFO L129 PetriNetUnfolder]: 94/716 cut-off events. [2022-07-21 08:51:09,377 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-07-21 08:51:09,392 INFO L84 FinitePrefix]: Finished finitePrefix Result has 789 conditions, 716 events. 94/716 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2535 event pairs, 0 based on Foata normal form. 0/602 useless extension candidates. Maximal degree in co-relation 687. Up to 20 conditions per place. [2022-07-21 08:51:09,392 INFO L82 GeneralOperation]: Start removeDead. Operand has 331 places, 370 transitions, 857 flow [2022-07-21 08:51:09,399 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 331 places, 370 transitions, 857 flow [2022-07-21 08:51:09,399 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:09,399 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:51:09,399 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:09,402 INFO L129 PetriNetUnfolder]: 4/88 cut-off events. [2022-07-21 08:51:09,402 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:09,402 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:09,402 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] [2022-07-21 08:51:09,403 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:09,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:09,403 INFO L85 PathProgramCache]: Analyzing trace with hash -210332282, now seen corresponding path program 1 times [2022-07-21 08:51:09,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:09,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192055434] [2022-07-21 08:51:09,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:09,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:09,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:09,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:09,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:09,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192055434] [2022-07-21 08:51:09,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192055434] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:09,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:09,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:51:09,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489132057] [2022-07-21 08:51:09,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:09,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:51:09,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:09,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:51:09,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:51:09,413 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 370 [2022-07-21 08:51:09,413 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 370 transitions, 857 flow. Second operand has 2 states, 2 states have (on average 302.5) internal successors, (605), 2 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:09,413 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:09,413 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 370 [2022-07-21 08:51:09,413 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:09,500 INFO L129 PetriNetUnfolder]: 0/612 cut-off events. [2022-07-21 08:51:09,500 INFO L130 PetriNetUnfolder]: For 201/201 co-relation queries the response was YES. [2022-07-21 08:51:09,500 INFO L84 FinitePrefix]: Finished finitePrefix Result has 695 conditions, 612 events. 0/612 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2366 event pairs, 0 based on Foata normal form. 264/856 useless extension candidates. Maximal degree in co-relation 0. Up to 10 conditions per place. [2022-07-21 08:51:09,501 INFO L132 encePairwiseOnDemand]: 312/370 looper letters, 9 selfloop transitions, 0 changer transitions 12/311 dead transitions. [2022-07-21 08:51:09,501 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 311 transitions, 757 flow [2022-07-21 08:51:09,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:51:09,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:51:09,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 671 transitions. [2022-07-21 08:51:09,502 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9067567567567567 [2022-07-21 08:51:09,502 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 671 transitions. [2022-07-21 08:51:09,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 671 transitions. [2022-07-21 08:51:09,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:09,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 671 transitions. [2022-07-21 08:51:09,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 335.5) internal successors, (671), 2 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:09,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 370.0) internal successors, (1110), 3 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:09,527 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 370.0) internal successors, (1110), 3 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:09,527 INFO L186 Difference]: Start difference. First operand has 331 places, 370 transitions, 857 flow. Second operand 2 states and 671 transitions. [2022-07-21 08:51:09,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 311 transitions, 757 flow [2022-07-21 08:51:09,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 311 transitions, 685 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:09,531 INFO L242 Difference]: Finished difference. Result has 331 places, 299 transitions, 643 flow [2022-07-21 08:51:09,532 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=643, PETRI_PLACES=331, PETRI_TRANSITIONS=299} [2022-07-21 08:51:09,532 INFO L279 CegarLoopForPetriNet]: 331 programPoint places, 0 predicate places. [2022-07-21 08:51:09,532 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 299 transitions, 643 flow [2022-07-21 08:51:09,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 302.5) internal successors, (605), 2 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:09,532 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:09,532 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] [2022-07-21 08:51:09,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-21 08:51:09,532 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:09,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:09,533 INFO L85 PathProgramCache]: Analyzing trace with hash -503735289, now seen corresponding path program 1 times [2022-07-21 08:51:09,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:09,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701558461] [2022-07-21 08:51:09,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:09,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:09,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:09,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701558461] [2022-07-21 08:51:09,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701558461] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:09,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:09,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:09,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797277852] [2022-07-21 08:51:09,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:09,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:09,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:09,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:09,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:09,548 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 370 [2022-07-21 08:51:09,549 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 299 transitions, 643 flow. Second operand has 3 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:09,549 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:09,549 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 370 [2022-07-21 08:51:09,549 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:09,646 INFO L129 PetriNetUnfolder]: 0/479 cut-off events. [2022-07-21 08:51:09,646 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-21 08:51:09,646 INFO L84 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 479 events. 0/479 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1504 event pairs, 0 based on Foata normal form. 0/470 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2022-07-21 08:51:09,647 INFO L132 encePairwiseOnDemand]: 367/370 looper letters, 18 selfloop transitions, 2 changer transitions 0/303 dead transitions. [2022-07-21 08:51:09,647 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 303 transitions, 691 flow [2022-07-21 08:51:09,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:09,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:09,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 906 transitions. [2022-07-21 08:51:09,648 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8162162162162162 [2022-07-21 08:51:09,648 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 906 transitions. [2022-07-21 08:51:09,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 906 transitions. [2022-07-21 08:51:09,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:09,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 906 transitions. [2022-07-21 08:51:09,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.0) internal successors, (906), 3 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:09,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:09,650 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:09,650 INFO L186 Difference]: Start difference. First operand has 331 places, 299 transitions, 643 flow. Second operand 3 states and 906 transitions. [2022-07-21 08:51:09,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 303 transitions, 691 flow [2022-07-21 08:51:09,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 303 transitions, 691 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:09,654 INFO L242 Difference]: Finished difference. Result has 322 places, 300 transitions, 655 flow [2022-07-21 08:51:09,654 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=655, PETRI_PLACES=322, PETRI_TRANSITIONS=300} [2022-07-21 08:51:09,654 INFO L279 CegarLoopForPetriNet]: 331 programPoint places, -9 predicate places. [2022-07-21 08:51:09,654 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 300 transitions, 655 flow [2022-07-21 08:51:09,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:09,655 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:09,655 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:09,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-21 08:51:09,655 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:09,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:09,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1805231264, now seen corresponding path program 1 times [2022-07-21 08:51:09,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:09,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279273567] [2022-07-21 08:51:09,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:09,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:09,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:09,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:09,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279273567] [2022-07-21 08:51:09,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279273567] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:09,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216618717] [2022-07-21 08:51:09,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:09,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:09,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:09,692 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:09,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 08:51:09,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:09,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:09,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:09,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:09,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216618717] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:09,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:09,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:09,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29419518] [2022-07-21 08:51:09,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:09,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:09,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:09,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:09,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:09,845 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 370 [2022-07-21 08:51:09,846 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 300 transitions, 655 flow. Second operand has 10 states, 10 states have (on average 296.3) internal successors, (2963), 10 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:09,846 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:09,846 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 370 [2022-07-21 08:51:09,846 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:09,964 INFO L129 PetriNetUnfolder]: 0/453 cut-off events. [2022-07-21 08:51:09,964 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-07-21 08:51:09,964 INFO L84 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 453 events. 0/453 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1345 event pairs, 0 based on Foata normal form. 2/455 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-07-21 08:51:09,965 INFO L132 encePairwiseOnDemand]: 364/370 looper letters, 19 selfloop transitions, 9 changer transitions 0/310 dead transitions. [2022-07-21 08:51:09,965 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 310 transitions, 733 flow [2022-07-21 08:51:09,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:09,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:09,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2676 transitions. [2022-07-21 08:51:09,967 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8036036036036036 [2022-07-21 08:51:09,967 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2676 transitions. [2022-07-21 08:51:09,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2676 transitions. [2022-07-21 08:51:09,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:09,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2676 transitions. [2022-07-21 08:51:09,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 297.3333333333333) internal successors, (2676), 9 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:09,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 370.0) internal successors, (3700), 10 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:09,972 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 370.0) internal successors, (3700), 10 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:09,972 INFO L186 Difference]: Start difference. First operand has 322 places, 300 transitions, 655 flow. Second operand 9 states and 2676 transitions. [2022-07-21 08:51:09,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 310 transitions, 733 flow [2022-07-21 08:51:09,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 310 transitions, 731 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:09,977 INFO L242 Difference]: Finished difference. Result has 332 places, 306 transitions, 703 flow [2022-07-21 08:51:09,977 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=703, PETRI_PLACES=332, PETRI_TRANSITIONS=306} [2022-07-21 08:51:09,977 INFO L279 CegarLoopForPetriNet]: 331 programPoint places, 1 predicate places. [2022-07-21 08:51:09,978 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 306 transitions, 703 flow [2022-07-21 08:51:09,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 296.3) internal successors, (2963), 10 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:09,978 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:09,978 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] [2022-07-21 08:51:09,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:10,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:10,194 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:10,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:10,194 INFO L85 PathProgramCache]: Analyzing trace with hash 484043797, now seen corresponding path program 1 times [2022-07-21 08:51:10,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:10,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505593023] [2022-07-21 08:51:10,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:10,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:10,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:10,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505593023] [2022-07-21 08:51:10,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505593023] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:10,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718959687] [2022-07-21 08:51:10,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:10,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:10,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:10,252 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:10,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 08:51:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:10,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:51:10,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:10,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:10,515 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:10,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718959687] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:10,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:10,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:51:10,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160207293] [2022-07-21 08:51:10,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:10,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:51:10,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:10,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:51:10,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:51:10,519 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 370 [2022-07-21 08:51:10,521 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 306 transitions, 703 flow. Second operand has 18 states, 18 states have (on average 296.6111111111111) internal successors, (5339), 18 states have internal predecessors, (5339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:10,522 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:10,522 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 370 [2022-07-21 08:51:10,522 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:10,732 INFO L129 PetriNetUnfolder]: 0/401 cut-off events. [2022-07-21 08:51:10,732 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-21 08:51:10,733 INFO L84 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 401 events. 0/401 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1006 event pairs, 0 based on Foata normal form. 4/405 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-21 08:51:10,733 INFO L132 encePairwiseOnDemand]: 364/370 looper letters, 27 selfloop transitions, 21 changer transitions 0/330 dead transitions. [2022-07-21 08:51:10,733 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 330 transitions, 907 flow [2022-07-21 08:51:10,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:51:10,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:51:10,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6226 transitions. [2022-07-21 08:51:10,738 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8012870012870013 [2022-07-21 08:51:10,738 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6226 transitions. [2022-07-21 08:51:10,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6226 transitions. [2022-07-21 08:51:10,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:10,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6226 transitions. [2022-07-21 08:51:10,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 296.4761904761905) internal successors, (6226), 21 states have internal predecessors, (6226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:10,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 370.0) internal successors, (8140), 22 states have internal predecessors, (8140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:10,748 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 370.0) internal successors, (8140), 22 states have internal predecessors, (8140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:10,748 INFO L186 Difference]: Start difference. First operand has 332 places, 306 transitions, 703 flow. Second operand 21 states and 6226 transitions. [2022-07-21 08:51:10,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 330 transitions, 907 flow [2022-07-21 08:51:10,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 330 transitions, 893 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:10,753 INFO L242 Difference]: Finished difference. Result has 356 places, 319 transitions, 827 flow [2022-07-21 08:51:10,753 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=827, PETRI_PLACES=356, PETRI_TRANSITIONS=319} [2022-07-21 08:51:10,753 INFO L279 CegarLoopForPetriNet]: 331 programPoint places, 25 predicate places. [2022-07-21 08:51:10,754 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 319 transitions, 827 flow [2022-07-21 08:51:10,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 296.6111111111111) internal successors, (5339), 18 states have internal predecessors, (5339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:10,754 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:10,754 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:10,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:10,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-21 08:51:10,972 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:10,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:10,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1803030795, now seen corresponding path program 1 times [2022-07-21 08:51:10,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:10,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850488582] [2022-07-21 08:51:10,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:10,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:11,102 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:11,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:11,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850488582] [2022-07-21 08:51:11,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850488582] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:11,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068767306] [2022-07-21 08:51:11,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:11,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:11,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:11,120 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:11,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 08:51:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:11,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:51:11,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:11,331 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:11,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:11,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068767306] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:11,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:11,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:51:11,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849201537] [2022-07-21 08:51:11,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:11,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:51:11,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:11,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:51:11,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:51:11,569 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 370 [2022-07-21 08:51:11,581 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 319 transitions, 827 flow. Second operand has 34 states, 34 states have (on average 296.79411764705884) internal successors, (10091), 34 states have internal predecessors, (10091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:11,587 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:11,587 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 370 [2022-07-21 08:51:11,587 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:11,883 INFO L129 PetriNetUnfolder]: 0/362 cut-off events. [2022-07-21 08:51:11,883 INFO L130 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-07-21 08:51:11,883 INFO L84 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 362 events. 0/362 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 777 event pairs, 0 based on Foata normal form. 3/365 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-21 08:51:11,884 INFO L132 encePairwiseOnDemand]: 365/370 looper letters, 30 selfloop transitions, 28 changer transitions 0/328 dead transitions. [2022-07-21 08:51:11,884 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 328 transitions, 1017 flow [2022-07-21 08:51:11,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 08:51:11,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-21 08:51:11,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8881 transitions. [2022-07-21 08:51:11,893 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8000900900900901 [2022-07-21 08:51:11,893 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8881 transitions. [2022-07-21 08:51:11,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8881 transitions. [2022-07-21 08:51:11,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:11,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8881 transitions. [2022-07-21 08:51:11,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 296.03333333333336) internal successors, (8881), 30 states have internal predecessors, (8881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:11,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 370.0) internal successors, (11470), 31 states have internal predecessors, (11470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:11,920 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 370.0) internal successors, (11470), 31 states have internal predecessors, (11470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:11,920 INFO L186 Difference]: Start difference. First operand has 356 places, 319 transitions, 827 flow. Second operand 30 states and 8881 transitions. [2022-07-21 08:51:11,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 328 transitions, 1017 flow [2022-07-21 08:51:11,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 328 transitions, 957 flow, removed 8 selfloop flow, removed 13 redundant places. [2022-07-21 08:51:11,926 INFO L242 Difference]: Finished difference. Result has 359 places, 312 transitions, 834 flow [2022-07-21 08:51:11,927 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=834, PETRI_PLACES=359, PETRI_TRANSITIONS=312} [2022-07-21 08:51:11,927 INFO L279 CegarLoopForPetriNet]: 331 programPoint places, 28 predicate places. [2022-07-21 08:51:11,928 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 312 transitions, 834 flow [2022-07-21 08:51:11,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 296.79411764705884) internal successors, (10091), 34 states have internal predecessors, (10091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:11,929 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:11,929 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:11,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:12,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-21 08:51:12,135 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:12,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:12,136 INFO L85 PathProgramCache]: Analyzing trace with hash 226570656, now seen corresponding path program 1 times [2022-07-21 08:51:12,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:12,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665461807] [2022-07-21 08:51:12,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:12,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:12,153 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:12,174 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:12,174 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:12,174 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:12,174 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:12,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-21 08:51:12,174 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 08:51:12,175 WARN L231 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:12,175 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-07-21 08:51:12,194 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:51:12,196 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 360 places, 403 transitions, 946 flow [2022-07-21 08:51:12,326 INFO L129 PetriNetUnfolder]: 104/788 cut-off events. [2022-07-21 08:51:12,326 INFO L130 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-07-21 08:51:12,336 INFO L84 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 788 events. 104/788 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2829 event pairs, 0 based on Foata normal form. 0/662 useless extension candidates. Maximal degree in co-relation 769. Up to 22 conditions per place. [2022-07-21 08:51:12,336 INFO L82 GeneralOperation]: Start removeDead. Operand has 360 places, 403 transitions, 946 flow [2022-07-21 08:51:12,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 360 places, 403 transitions, 946 flow [2022-07-21 08:51:12,343 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:12,344 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:51:12,344 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:12,346 INFO L129 PetriNetUnfolder]: 5/91 cut-off events. [2022-07-21 08:51:12,347 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:12,347 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:12,347 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:12,347 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:12,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:12,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1498309670, now seen corresponding path program 1 times [2022-07-21 08:51:12,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:12,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696798886] [2022-07-21 08:51:12,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:12,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:12,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:12,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696798886] [2022-07-21 08:51:12,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696798886] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:12,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:12,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:51:12,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028560612] [2022-07-21 08:51:12,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:12,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:51:12,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:12,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:51:12,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:51:12,357 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 403 [2022-07-21 08:51:12,357 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 403 transitions, 946 flow. Second operand has 2 states, 2 states have (on average 328.5) internal successors, (657), 2 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:12,357 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:12,357 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 403 [2022-07-21 08:51:12,357 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:12,459 INFO L129 PetriNetUnfolder]: 0/673 cut-off events. [2022-07-21 08:51:12,460 INFO L130 PetriNetUnfolder]: For 265/265 co-relation queries the response was YES. [2022-07-21 08:51:12,460 INFO L84 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 673 events. 0/673 cut-off events. For 265/265 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2590 event pairs, 0 based on Foata normal form. 322/973 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-21 08:51:12,461 INFO L132 encePairwiseOnDemand]: 339/403 looper letters, 10 selfloop transitions, 0 changer transitions 12/338 dead transitions. [2022-07-21 08:51:12,461 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 338 transitions, 836 flow [2022-07-21 08:51:12,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:51:12,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:51:12,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 730 transitions. [2022-07-21 08:51:12,462 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9057071960297767 [2022-07-21 08:51:12,462 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 730 transitions. [2022-07-21 08:51:12,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 730 transitions. [2022-07-21 08:51:12,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:12,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 730 transitions. [2022-07-21 08:51:12,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 365.0) internal successors, (730), 2 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:12,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 403.0) internal successors, (1209), 3 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:12,464 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 403.0) internal successors, (1209), 3 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:12,464 INFO L186 Difference]: Start difference. First operand has 360 places, 403 transitions, 946 flow. Second operand 2 states and 730 transitions. [2022-07-21 08:51:12,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 338 transitions, 836 flow [2022-07-21 08:51:12,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 338 transitions, 746 flow, removed 45 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:12,468 INFO L242 Difference]: Finished difference. Result has 360 places, 326 transitions, 702 flow [2022-07-21 08:51:12,468 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=702, PETRI_PLACES=360, PETRI_TRANSITIONS=326} [2022-07-21 08:51:12,469 INFO L279 CegarLoopForPetriNet]: 360 programPoint places, 0 predicate places. [2022-07-21 08:51:12,469 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 326 transitions, 702 flow [2022-07-21 08:51:12,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 328.5) internal successors, (657), 2 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:12,469 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:12,469 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] [2022-07-21 08:51:12,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-21 08:51:12,469 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:12,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:12,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1204906663, now seen corresponding path program 1 times [2022-07-21 08:51:12,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:12,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311286887] [2022-07-21 08:51:12,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:12,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:12,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:12,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:12,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311286887] [2022-07-21 08:51:12,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311286887] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:12,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:12,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:12,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697805410] [2022-07-21 08:51:12,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:12,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:12,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:12,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:12,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:12,483 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 403 [2022-07-21 08:51:12,483 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 326 transitions, 702 flow. Second operand has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:12,483 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:12,483 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 403 [2022-07-21 08:51:12,483 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:12,602 INFO L129 PetriNetUnfolder]: 0/528 cut-off events. [2022-07-21 08:51:12,602 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-07-21 08:51:12,602 INFO L84 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 528 events. 0/528 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1685 event pairs, 0 based on Foata normal form. 0/518 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-07-21 08:51:12,603 INFO L132 encePairwiseOnDemand]: 400/403 looper letters, 19 selfloop transitions, 2 changer transitions 0/330 dead transitions. [2022-07-21 08:51:12,603 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 330 transitions, 752 flow [2022-07-21 08:51:12,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:12,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:12,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 985 transitions. [2022-07-21 08:51:12,606 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8147229114971051 [2022-07-21 08:51:12,606 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 985 transitions. [2022-07-21 08:51:12,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 985 transitions. [2022-07-21 08:51:12,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:12,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 985 transitions. [2022-07-21 08:51:12,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 328.3333333333333) internal successors, (985), 3 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:12,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:12,608 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:12,608 INFO L186 Difference]: Start difference. First operand has 360 places, 326 transitions, 702 flow. Second operand 3 states and 985 transitions. [2022-07-21 08:51:12,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 330 transitions, 752 flow [2022-07-21 08:51:12,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 330 transitions, 752 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:12,612 INFO L242 Difference]: Finished difference. Result has 351 places, 327 transitions, 714 flow [2022-07-21 08:51:12,612 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=714, PETRI_PLACES=351, PETRI_TRANSITIONS=327} [2022-07-21 08:51:12,612 INFO L279 CegarLoopForPetriNet]: 360 programPoint places, -9 predicate places. [2022-07-21 08:51:12,612 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 327 transitions, 714 flow [2022-07-21 08:51:12,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:12,613 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:12,613 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:12,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-21 08:51:12,613 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:12,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:12,613 INFO L85 PathProgramCache]: Analyzing trace with hash 144830272, now seen corresponding path program 1 times [2022-07-21 08:51:12,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:12,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433810676] [2022-07-21 08:51:12,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:12,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:12,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:12,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:12,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433810676] [2022-07-21 08:51:12,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433810676] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:12,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48285229] [2022-07-21 08:51:12,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:12,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:12,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:12,635 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:12,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 08:51:12,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:12,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:12,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:12,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:12,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48285229] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:12,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:12,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:12,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583885384] [2022-07-21 08:51:12,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:12,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:12,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:12,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:12,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:12,810 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 403 [2022-07-21 08:51:12,811 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 327 transitions, 714 flow. Second operand has 10 states, 10 states have (on average 322.3) internal successors, (3223), 10 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:12,812 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:12,812 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 403 [2022-07-21 08:51:12,812 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:12,958 INFO L129 PetriNetUnfolder]: 0/502 cut-off events. [2022-07-21 08:51:12,958 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-21 08:51:12,959 INFO L84 FinitePrefix]: Finished finitePrefix Result has 639 conditions, 502 events. 0/502 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1531 event pairs, 0 based on Foata normal form. 2/504 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-07-21 08:51:12,960 INFO L132 encePairwiseOnDemand]: 397/403 looper letters, 20 selfloop transitions, 9 changer transitions 0/337 dead transitions. [2022-07-21 08:51:12,960 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 337 transitions, 794 flow [2022-07-21 08:51:12,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:12,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:12,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2911 transitions. [2022-07-21 08:51:12,963 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8025916735594155 [2022-07-21 08:51:12,963 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2911 transitions. [2022-07-21 08:51:12,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2911 transitions. [2022-07-21 08:51:12,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:12,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2911 transitions. [2022-07-21 08:51:12,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 323.44444444444446) internal successors, (2911), 9 states have internal predecessors, (2911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:12,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 403.0) internal successors, (4030), 10 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:12,967 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 403.0) internal successors, (4030), 10 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:12,967 INFO L186 Difference]: Start difference. First operand has 351 places, 327 transitions, 714 flow. Second operand 9 states and 2911 transitions. [2022-07-21 08:51:12,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 337 transitions, 794 flow [2022-07-21 08:51:12,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 337 transitions, 792 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:12,972 INFO L242 Difference]: Finished difference. Result has 361 places, 333 transitions, 762 flow [2022-07-21 08:51:12,972 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=762, PETRI_PLACES=361, PETRI_TRANSITIONS=333} [2022-07-21 08:51:12,972 INFO L279 CegarLoopForPetriNet]: 360 programPoint places, 1 predicate places. [2022-07-21 08:51:12,972 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 333 transitions, 762 flow [2022-07-21 08:51:12,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 322.3) internal successors, (3223), 10 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:12,973 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:12,973 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] [2022-07-21 08:51:12,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:13,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:13,188 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:13,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:13,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1371680437, now seen corresponding path program 1 times [2022-07-21 08:51:13,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:13,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170651960] [2022-07-21 08:51:13,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:13,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:13,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:13,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170651960] [2022-07-21 08:51:13,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170651960] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:13,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495873325] [2022-07-21 08:51:13,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:13,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:13,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:13,271 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:13,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 08:51:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:13,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:51:13,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:13,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:13,535 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:13,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495873325] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:13,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:13,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:51:13,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273775858] [2022-07-21 08:51:13,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:13,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:51:13,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:13,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:51:13,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:51:13,538 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 403 [2022-07-21 08:51:13,540 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 333 transitions, 762 flow. Second operand has 18 states, 18 states have (on average 322.6111111111111) internal successors, (5807), 18 states have internal predecessors, (5807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:13,540 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:13,540 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 403 [2022-07-21 08:51:13,540 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:13,767 INFO L129 PetriNetUnfolder]: 0/450 cut-off events. [2022-07-21 08:51:13,767 INFO L130 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-07-21 08:51:13,767 INFO L84 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 450 events. 0/450 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1190 event pairs, 0 based on Foata normal form. 4/454 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-21 08:51:13,770 INFO L132 encePairwiseOnDemand]: 397/403 looper letters, 28 selfloop transitions, 21 changer transitions 0/357 dead transitions. [2022-07-21 08:51:13,770 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 357 transitions, 968 flow [2022-07-21 08:51:13,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:51:13,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:51:13,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6773 transitions. [2022-07-21 08:51:13,774 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8003072196620584 [2022-07-21 08:51:13,774 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6773 transitions. [2022-07-21 08:51:13,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6773 transitions. [2022-07-21 08:51:13,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:13,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6773 transitions. [2022-07-21 08:51:13,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 322.5238095238095) internal successors, (6773), 21 states have internal predecessors, (6773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:13,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 403.0) internal successors, (8866), 22 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:13,784 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 403.0) internal successors, (8866), 22 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:13,784 INFO L186 Difference]: Start difference. First operand has 361 places, 333 transitions, 762 flow. Second operand 21 states and 6773 transitions. [2022-07-21 08:51:13,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 357 transitions, 968 flow [2022-07-21 08:51:13,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 357 transitions, 954 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:13,789 INFO L242 Difference]: Finished difference. Result has 385 places, 346 transitions, 886 flow [2022-07-21 08:51:13,789 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=886, PETRI_PLACES=385, PETRI_TRANSITIONS=346} [2022-07-21 08:51:13,790 INFO L279 CegarLoopForPetriNet]: 360 programPoint places, 25 predicate places. [2022-07-21 08:51:13,790 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 346 transitions, 886 flow [2022-07-21 08:51:13,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 322.6111111111111) internal successors, (5807), 18 states have internal predecessors, (5807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:13,790 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:13,790 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:13,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:14,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:14,006 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:14,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:14,006 INFO L85 PathProgramCache]: Analyzing trace with hash -149142613, now seen corresponding path program 1 times [2022-07-21 08:51:14,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:14,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677211263] [2022-07-21 08:51:14,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:14,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:14,146 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:14,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:14,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677211263] [2022-07-21 08:51:14,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677211263] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:14,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460756712] [2022-07-21 08:51:14,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:14,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:14,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:14,148 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:14,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 08:51:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:14,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:51:14,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:14,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:14,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460756712] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:14,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:14,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:51:14,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997158526] [2022-07-21 08:51:14,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:14,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:51:14,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:14,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:51:14,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:51:14,651 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 403 [2022-07-21 08:51:14,655 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 346 transitions, 886 flow. Second operand has 34 states, 34 states have (on average 322.79411764705884) internal successors, (10975), 34 states have internal predecessors, (10975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:14,656 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:14,656 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 403 [2022-07-21 08:51:14,656 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:15,063 INFO L129 PetriNetUnfolder]: 0/398 cut-off events. [2022-07-21 08:51:15,079 INFO L130 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-07-21 08:51:15,080 INFO L84 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 398 events. 0/398 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 875 event pairs, 0 based on Foata normal form. 4/402 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-07-21 08:51:15,081 INFO L132 encePairwiseOnDemand]: 398/403 looper letters, 33 selfloop transitions, 31 changer transitions 0/360 dead transitions. [2022-07-21 08:51:15,082 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 360 transitions, 1122 flow [2022-07-21 08:51:15,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 08:51:15,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-21 08:51:15,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 10628 transitions. [2022-07-21 08:51:15,088 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7991578314158959 [2022-07-21 08:51:15,088 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 10628 transitions. [2022-07-21 08:51:15,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 10628 transitions. [2022-07-21 08:51:15,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:15,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 10628 transitions. [2022-07-21 08:51:15,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 322.06060606060606) internal successors, (10628), 33 states have internal predecessors, (10628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:15,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 403.0) internal successors, (13702), 34 states have internal predecessors, (13702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:15,137 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 403.0) internal successors, (13702), 34 states have internal predecessors, (13702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:15,137 INFO L186 Difference]: Start difference. First operand has 385 places, 346 transitions, 886 flow. Second operand 33 states and 10628 transitions. [2022-07-21 08:51:15,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 360 transitions, 1122 flow [2022-07-21 08:51:15,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 360 transitions, 1056 flow, removed 9 selfloop flow, removed 13 redundant places. [2022-07-21 08:51:15,143 INFO L242 Difference]: Finished difference. Result has 391 places, 342 transitions, 917 flow [2022-07-21 08:51:15,144 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=917, PETRI_PLACES=391, PETRI_TRANSITIONS=342} [2022-07-21 08:51:15,144 INFO L279 CegarLoopForPetriNet]: 360 programPoint places, 31 predicate places. [2022-07-21 08:51:15,144 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 342 transitions, 917 flow [2022-07-21 08:51:15,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 322.79411764705884) internal successors, (10975), 34 states have internal predecessors, (10975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:15,145 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:15,146 INFO L200 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:15,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:15,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:15,346 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:15,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:15,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1786652926, now seen corresponding path program 1 times [2022-07-21 08:51:15,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:15,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651781311] [2022-07-21 08:51:15,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:15,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:15,377 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:15,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:15,434 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:15,435 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:15,435 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:15,435 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:15,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-21 08:51:15,435 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 08:51:15,436 WARN L231 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:15,436 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2022-07-21 08:51:15,457 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:51:15,459 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 389 places, 436 transitions, 1037 flow [2022-07-21 08:51:15,579 INFO L129 PetriNetUnfolder]: 114/860 cut-off events. [2022-07-21 08:51:15,579 INFO L130 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2022-07-21 08:51:15,603 INFO L84 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 860 events. 114/860 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3087 event pairs, 0 based on Foata normal form. 0/722 useless extension candidates. Maximal degree in co-relation 852. Up to 24 conditions per place. [2022-07-21 08:51:15,603 INFO L82 GeneralOperation]: Start removeDead. Operand has 389 places, 436 transitions, 1037 flow [2022-07-21 08:51:15,614 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 389 places, 436 transitions, 1037 flow [2022-07-21 08:51:15,615 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:15,615 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:51:15,615 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:15,618 INFO L129 PetriNetUnfolder]: 4/87 cut-off events. [2022-07-21 08:51:15,618 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:15,619 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:15,619 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] [2022-07-21 08:51:15,619 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:15,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:15,619 INFO L85 PathProgramCache]: Analyzing trace with hash 650520998, now seen corresponding path program 1 times [2022-07-21 08:51:15,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:15,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130741500] [2022-07-21 08:51:15,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:15,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:15,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:15,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:15,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130741500] [2022-07-21 08:51:15,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130741500] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:15,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:15,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:51:15,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264736875] [2022-07-21 08:51:15,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:15,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:51:15,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:15,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:51:15,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:51:15,634 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 354 out of 436 [2022-07-21 08:51:15,635 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 436 transitions, 1037 flow. Second operand has 2 states, 2 states have (on average 354.5) internal successors, (709), 2 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:15,635 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:15,635 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 354 of 436 [2022-07-21 08:51:15,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:15,764 INFO L129 PetriNetUnfolder]: 0/734 cut-off events. [2022-07-21 08:51:15,764 INFO L130 PetriNetUnfolder]: For 341/341 co-relation queries the response was YES. [2022-07-21 08:51:15,764 INFO L84 FinitePrefix]: Finished finitePrefix Result has 846 conditions, 734 events. 0/734 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2888 event pairs, 0 based on Foata normal form. 386/1096 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-07-21 08:51:15,766 INFO L132 encePairwiseOnDemand]: 366/436 looper letters, 11 selfloop transitions, 0 changer transitions 12/365 dead transitions. [2022-07-21 08:51:15,766 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 365 transitions, 917 flow [2022-07-21 08:51:15,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:51:15,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:51:15,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 789 transitions. [2022-07-21 08:51:15,767 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9048165137614679 [2022-07-21 08:51:15,767 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 789 transitions. [2022-07-21 08:51:15,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 789 transitions. [2022-07-21 08:51:15,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:15,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 789 transitions. [2022-07-21 08:51:15,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 394.5) internal successors, (789), 2 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:15,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 436.0) internal successors, (1308), 3 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:15,769 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 436.0) internal successors, (1308), 3 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:15,769 INFO L186 Difference]: Start difference. First operand has 389 places, 436 transitions, 1037 flow. Second operand 2 states and 789 transitions. [2022-07-21 08:51:15,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 365 transitions, 917 flow [2022-07-21 08:51:15,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 365 transitions, 807 flow, removed 55 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:15,774 INFO L242 Difference]: Finished difference. Result has 389 places, 353 transitions, 761 flow [2022-07-21 08:51:15,775 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=761, PETRI_PLACES=389, PETRI_TRANSITIONS=353} [2022-07-21 08:51:15,775 INFO L279 CegarLoopForPetriNet]: 389 programPoint places, 0 predicate places. [2022-07-21 08:51:15,775 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 353 transitions, 761 flow [2022-07-21 08:51:15,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 354.5) internal successors, (709), 2 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:15,775 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:15,776 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] [2022-07-21 08:51:15,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-21 08:51:15,776 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:15,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:15,776 INFO L85 PathProgramCache]: Analyzing trace with hash 357117991, now seen corresponding path program 1 times [2022-07-21 08:51:15,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:15,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525673153] [2022-07-21 08:51:15,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:15,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:15,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:15,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525673153] [2022-07-21 08:51:15,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525673153] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:15,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:15,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:15,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639814394] [2022-07-21 08:51:15,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:15,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:15,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:15,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:15,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:15,811 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 347 out of 436 [2022-07-21 08:51:15,811 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 353 transitions, 761 flow. Second operand has 3 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:15,811 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:15,811 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 347 of 436 [2022-07-21 08:51:15,811 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:15,929 INFO L129 PetriNetUnfolder]: 0/577 cut-off events. [2022-07-21 08:51:15,929 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-21 08:51:15,930 INFO L84 FinitePrefix]: Finished finitePrefix Result has 694 conditions, 577 events. 0/577 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1872 event pairs, 0 based on Foata normal form. 0/566 useless extension candidates. Maximal degree in co-relation 0. Up to 66 conditions per place. [2022-07-21 08:51:15,931 INFO L132 encePairwiseOnDemand]: 433/436 looper letters, 20 selfloop transitions, 2 changer transitions 0/357 dead transitions. [2022-07-21 08:51:15,931 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 357 transitions, 813 flow [2022-07-21 08:51:15,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:15,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:15,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1064 transitions. [2022-07-21 08:51:15,932 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8134556574923547 [2022-07-21 08:51:15,932 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1064 transitions. [2022-07-21 08:51:15,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1064 transitions. [2022-07-21 08:51:15,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:15,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1064 transitions. [2022-07-21 08:51:15,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 354.6666666666667) internal successors, (1064), 3 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:15,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:15,935 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:15,935 INFO L186 Difference]: Start difference. First operand has 389 places, 353 transitions, 761 flow. Second operand 3 states and 1064 transitions. [2022-07-21 08:51:15,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 357 transitions, 813 flow [2022-07-21 08:51:15,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 357 transitions, 813 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:15,939 INFO L242 Difference]: Finished difference. Result has 380 places, 354 transitions, 773 flow [2022-07-21 08:51:15,940 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=773, PETRI_PLACES=380, PETRI_TRANSITIONS=354} [2022-07-21 08:51:15,940 INFO L279 CegarLoopForPetriNet]: 389 programPoint places, -9 predicate places. [2022-07-21 08:51:15,940 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 354 transitions, 773 flow [2022-07-21 08:51:15,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:15,941 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:15,941 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:15,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-07-21 08:51:15,941 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:15,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:15,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1754914144, now seen corresponding path program 1 times [2022-07-21 08:51:15,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:15,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213707736] [2022-07-21 08:51:15,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:15,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:15,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:15,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213707736] [2022-07-21 08:51:15,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213707736] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:15,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404272481] [2022-07-21 08:51:15,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:15,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:15,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:15,980 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:15,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 08:51:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:16,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:16,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:16,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:16,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404272481] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:16,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:16,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:16,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389005261] [2022-07-21 08:51:16,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:16,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:16,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:16,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:16,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:16,204 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 436 [2022-07-21 08:51:16,205 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 354 transitions, 773 flow. Second operand has 10 states, 10 states have (on average 348.3) internal successors, (3483), 10 states have internal predecessors, (3483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:16,205 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:16,205 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 436 [2022-07-21 08:51:16,205 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:16,360 INFO L129 PetriNetUnfolder]: 0/551 cut-off events. [2022-07-21 08:51:16,360 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-07-21 08:51:16,360 INFO L84 FinitePrefix]: Finished finitePrefix Result has 701 conditions, 551 events. 0/551 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1715 event pairs, 0 based on Foata normal form. 2/553 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-07-21 08:51:16,361 INFO L132 encePairwiseOnDemand]: 430/436 looper letters, 21 selfloop transitions, 9 changer transitions 0/364 dead transitions. [2022-07-21 08:51:16,361 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 364 transitions, 855 flow [2022-07-21 08:51:16,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:16,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:16,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3146 transitions. [2022-07-21 08:51:16,363 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8017329255861366 [2022-07-21 08:51:16,364 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3146 transitions. [2022-07-21 08:51:16,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3146 transitions. [2022-07-21 08:51:16,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:16,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3146 transitions. [2022-07-21 08:51:16,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 349.55555555555554) internal successors, (3146), 9 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:16,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:16,368 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:16,368 INFO L186 Difference]: Start difference. First operand has 380 places, 354 transitions, 773 flow. Second operand 9 states and 3146 transitions. [2022-07-21 08:51:16,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 364 transitions, 855 flow [2022-07-21 08:51:16,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 364 transitions, 853 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:16,373 INFO L242 Difference]: Finished difference. Result has 390 places, 360 transitions, 821 flow [2022-07-21 08:51:16,373 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=821, PETRI_PLACES=390, PETRI_TRANSITIONS=360} [2022-07-21 08:51:16,374 INFO L279 CegarLoopForPetriNet]: 389 programPoint places, 1 predicate places. [2022-07-21 08:51:16,374 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 360 transitions, 821 flow [2022-07-21 08:51:16,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 348.3) internal successors, (3483), 10 states have internal predecessors, (3483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:16,374 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:16,374 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:16,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:16,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-21 08:51:16,592 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:16,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:16,592 INFO L85 PathProgramCache]: Analyzing trace with hash 126719509, now seen corresponding path program 1 times [2022-07-21 08:51:16,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:16,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294515624] [2022-07-21 08:51:16,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:16,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:16,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:16,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:16,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294515624] [2022-07-21 08:51:16,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294515624] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:16,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525739111] [2022-07-21 08:51:16,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:16,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:16,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:16,683 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:16,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 08:51:16,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:16,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:51:16,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:16,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:16,951 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:16,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525739111] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:16,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:16,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:51:16,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238109063] [2022-07-21 08:51:16,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:16,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:51:16,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:16,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:51:16,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:51:16,956 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 436 [2022-07-21 08:51:16,959 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 360 transitions, 821 flow. Second operand has 18 states, 18 states have (on average 348.6111111111111) internal successors, (6275), 18 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:16,959 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:16,959 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 436 [2022-07-21 08:51:16,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:17,194 INFO L129 PetriNetUnfolder]: 0/499 cut-off events. [2022-07-21 08:51:17,195 INFO L130 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-07-21 08:51:17,195 INFO L84 FinitePrefix]: Finished finitePrefix Result has 718 conditions, 499 events. 0/499 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1374 event pairs, 0 based on Foata normal form. 4/503 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-07-21 08:51:17,196 INFO L132 encePairwiseOnDemand]: 430/436 looper letters, 29 selfloop transitions, 21 changer transitions 0/384 dead transitions. [2022-07-21 08:51:17,196 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 384 transitions, 1029 flow [2022-07-21 08:51:17,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:51:17,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:51:17,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7320 transitions. [2022-07-21 08:51:17,200 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.799475753604194 [2022-07-21 08:51:17,200 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7320 transitions. [2022-07-21 08:51:17,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7320 transitions. [2022-07-21 08:51:17,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:17,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7320 transitions. [2022-07-21 08:51:17,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 348.57142857142856) internal successors, (7320), 21 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:17,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 436.0) internal successors, (9592), 22 states have internal predecessors, (9592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:17,210 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 436.0) internal successors, (9592), 22 states have internal predecessors, (9592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:17,210 INFO L186 Difference]: Start difference. First operand has 390 places, 360 transitions, 821 flow. Second operand 21 states and 7320 transitions. [2022-07-21 08:51:17,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 384 transitions, 1029 flow [2022-07-21 08:51:17,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 384 transitions, 1015 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:17,216 INFO L242 Difference]: Finished difference. Result has 414 places, 373 transitions, 945 flow [2022-07-21 08:51:17,216 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=945, PETRI_PLACES=414, PETRI_TRANSITIONS=373} [2022-07-21 08:51:17,216 INFO L279 CegarLoopForPetriNet]: 389 programPoint places, 25 predicate places. [2022-07-21 08:51:17,216 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 373 transitions, 945 flow [2022-07-21 08:51:17,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 348.6111111111111) internal successors, (6275), 18 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:17,217 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:17,217 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:17,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:17,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-21 08:51:17,434 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:17,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:17,434 INFO L85 PathProgramCache]: Analyzing trace with hash -256688757, now seen corresponding path program 1 times [2022-07-21 08:51:17,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:17,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037074913] [2022-07-21 08:51:17,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:17,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:17,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:17,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037074913] [2022-07-21 08:51:17,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037074913] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:17,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781376926] [2022-07-21 08:51:17,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:17,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:17,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:17,545 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:17,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-21 08:51:17,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:17,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:51:17,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:17,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:18,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781376926] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:18,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:18,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:51:18,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657920592] [2022-07-21 08:51:18,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:18,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:51:18,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:18,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:51:18,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:51:18,031 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 436 [2022-07-21 08:51:18,035 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 373 transitions, 945 flow. Second operand has 34 states, 34 states have (on average 348.79411764705884) internal successors, (11859), 34 states have internal predecessors, (11859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:18,035 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:18,035 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 436 [2022-07-21 08:51:18,035 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:18,456 INFO L129 PetriNetUnfolder]: 0/434 cut-off events. [2022-07-21 08:51:18,457 INFO L130 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2022-07-21 08:51:18,457 INFO L84 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 434 events. 0/434 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 973 event pairs, 0 based on Foata normal form. 5/439 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-21 08:51:18,457 INFO L132 encePairwiseOnDemand]: 431/436 looper letters, 36 selfloop transitions, 34 changer transitions 0/392 dead transitions. [2022-07-21 08:51:18,457 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 392 transitions, 1227 flow [2022-07-21 08:51:18,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 08:51:18,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-21 08:51:18,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 12531 transitions. [2022-07-21 08:51:18,464 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7983562691131498 [2022-07-21 08:51:18,464 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 12531 transitions. [2022-07-21 08:51:18,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 12531 transitions. [2022-07-21 08:51:18,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:18,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 12531 transitions. [2022-07-21 08:51:18,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 348.0833333333333) internal successors, (12531), 36 states have internal predecessors, (12531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:18,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 436.0) internal successors, (16132), 37 states have internal predecessors, (16132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:18,481 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 436.0) internal successors, (16132), 37 states have internal predecessors, (16132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:18,481 INFO L186 Difference]: Start difference. First operand has 414 places, 373 transitions, 945 flow. Second operand 36 states and 12531 transitions. [2022-07-21 08:51:18,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 392 transitions, 1227 flow [2022-07-21 08:51:18,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 392 transitions, 1155 flow, removed 10 selfloop flow, removed 13 redundant places. [2022-07-21 08:51:18,487 INFO L242 Difference]: Finished difference. Result has 423 places, 372 transitions, 1000 flow [2022-07-21 08:51:18,487 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1000, PETRI_PLACES=423, PETRI_TRANSITIONS=372} [2022-07-21 08:51:18,487 INFO L279 CegarLoopForPetriNet]: 389 programPoint places, 34 predicate places. [2022-07-21 08:51:18,487 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 372 transitions, 1000 flow [2022-07-21 08:51:18,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 348.79411764705884) internal successors, (11859), 34 states have internal predecessors, (11859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:18,489 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:18,489 INFO L200 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:18,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:18,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:18,706 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:18,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:18,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1101802981, now seen corresponding path program 1 times [2022-07-21 08:51:18,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:18,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629929268] [2022-07-21 08:51:18,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:18,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:18,728 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:18,762 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:18,762 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:18,762 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:18,763 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:18,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-07-21 08:51:18,763 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 08:51:18,765 WARN L231 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:18,765 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2022-07-21 08:51:18,789 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:51:18,792 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 418 places, 469 transitions, 1130 flow [2022-07-21 08:51:18,933 INFO L129 PetriNetUnfolder]: 124/932 cut-off events. [2022-07-21 08:51:18,933 INFO L130 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2022-07-21 08:51:18,959 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1047 conditions, 932 events. 124/932 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3462 event pairs, 0 based on Foata normal form. 0/782 useless extension candidates. Maximal degree in co-relation 936. Up to 26 conditions per place. [2022-07-21 08:51:18,959 INFO L82 GeneralOperation]: Start removeDead. Operand has 418 places, 469 transitions, 1130 flow [2022-07-21 08:51:18,971 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 418 places, 469 transitions, 1130 flow [2022-07-21 08:51:18,972 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:18,972 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:51:18,972 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:18,976 INFO L129 PetriNetUnfolder]: 5/90 cut-off events. [2022-07-21 08:51:18,976 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:18,976 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:18,976 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] [2022-07-21 08:51:18,976 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:18,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:18,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1247865991, now seen corresponding path program 1 times [2022-07-21 08:51:18,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:18,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245450974] [2022-07-21 08:51:18,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:18,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:18,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:18,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:18,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245450974] [2022-07-21 08:51:18,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245450974] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:18,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:18,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:18,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601187753] [2022-07-21 08:51:18,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:18,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:18,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:18,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:18,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:18,992 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 373 out of 469 [2022-07-21 08:51:18,993 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 469 transitions, 1130 flow. Second operand has 3 states, 3 states have (on average 374.0) internal successors, (1122), 3 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:18,993 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:18,993 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 373 of 469 [2022-07-21 08:51:18,993 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:19,186 INFO L129 PetriNetUnfolder]: 0/770 cut-off events. [2022-07-21 08:51:19,186 INFO L130 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2022-07-21 08:51:19,186 INFO L84 FinitePrefix]: Finished finitePrefix Result has 962 conditions, 770 events. 0/770 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3037 event pairs, 0 based on Foata normal form. 2389/3135 useless extension candidates. Maximal degree in co-relation 0. Up to 72 conditions per place. [2022-07-21 08:51:19,188 INFO L132 encePairwiseOnDemand]: 390/469 looper letters, 21 selfloop transitions, 2 changer transitions 12/396 dead transitions. [2022-07-21 08:51:19,188 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 396 transitions, 1030 flow [2022-07-21 08:51:19,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:19,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:19,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1226 transitions. [2022-07-21 08:51:19,189 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8713574982231699 [2022-07-21 08:51:19,189 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1226 transitions. [2022-07-21 08:51:19,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1226 transitions. [2022-07-21 08:51:19,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:19,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1226 transitions. [2022-07-21 08:51:19,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 408.6666666666667) internal successors, (1226), 3 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:19,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 469.0) internal successors, (1876), 4 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:19,192 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 469.0) internal successors, (1876), 4 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:19,192 INFO L186 Difference]: Start difference. First operand has 418 places, 469 transitions, 1130 flow. Second operand 3 states and 1226 transitions. [2022-07-21 08:51:19,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 396 transitions, 1030 flow [2022-07-21 08:51:19,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 396 transitions, 898 flow, removed 66 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:19,197 INFO L242 Difference]: Finished difference. Result has 420 places, 381 transitions, 832 flow [2022-07-21 08:51:19,198 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=832, PETRI_PLACES=420, PETRI_TRANSITIONS=381} [2022-07-21 08:51:19,198 INFO L279 CegarLoopForPetriNet]: 418 programPoint places, 2 predicate places. [2022-07-21 08:51:19,198 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 381 transitions, 832 flow [2022-07-21 08:51:19,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 374.0) internal successors, (1122), 3 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:19,199 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:19,199 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:19,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-07-21 08:51:19,199 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:19,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:19,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1954451712, now seen corresponding path program 1 times [2022-07-21 08:51:19,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:19,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976307931] [2022-07-21 08:51:19,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:19,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:19,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:19,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:19,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976307931] [2022-07-21 08:51:19,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976307931] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:19,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008481312] [2022-07-21 08:51:19,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:19,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:19,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:19,240 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:19,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-21 08:51:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:19,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:19,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:19,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:19,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:19,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008481312] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:19,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:19,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:19,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035444184] [2022-07-21 08:51:19,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:19,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:19,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:19,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:19,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:19,462 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 372 out of 469 [2022-07-21 08:51:19,463 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 381 transitions, 832 flow. Second operand has 10 states, 10 states have (on average 374.3) internal successors, (3743), 10 states have internal predecessors, (3743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:19,463 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:19,464 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 372 of 469 [2022-07-21 08:51:19,464 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:19,657 INFO L129 PetriNetUnfolder]: 0/600 cut-off events. [2022-07-21 08:51:19,658 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-07-21 08:51:19,658 INFO L84 FinitePrefix]: Finished finitePrefix Result has 762 conditions, 600 events. 0/600 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1901 event pairs, 0 based on Foata normal form. 2/602 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-07-21 08:51:19,659 INFO L132 encePairwiseOnDemand]: 463/469 looper letters, 22 selfloop transitions, 9 changer transitions 0/391 dead transitions. [2022-07-21 08:51:19,659 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 391 transitions, 916 flow [2022-07-21 08:51:19,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:19,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:19,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3381 transitions. [2022-07-21 08:51:19,662 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8009950248756219 [2022-07-21 08:51:19,662 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3381 transitions. [2022-07-21 08:51:19,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3381 transitions. [2022-07-21 08:51:19,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:19,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3381 transitions. [2022-07-21 08:51:19,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 375.6666666666667) internal successors, (3381), 9 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:19,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 469.0) internal successors, (4690), 10 states have internal predecessors, (4690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:19,668 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 469.0) internal successors, (4690), 10 states have internal predecessors, (4690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:19,668 INFO L186 Difference]: Start difference. First operand has 420 places, 381 transitions, 832 flow. Second operand 9 states and 3381 transitions. [2022-07-21 08:51:19,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 391 transitions, 916 flow [2022-07-21 08:51:19,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 391 transitions, 914 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:19,675 INFO L242 Difference]: Finished difference. Result has 418 places, 387 transitions, 880 flow [2022-07-21 08:51:19,675 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=880, PETRI_PLACES=418, PETRI_TRANSITIONS=387} [2022-07-21 08:51:19,676 INFO L279 CegarLoopForPetriNet]: 418 programPoint places, 0 predicate places. [2022-07-21 08:51:19,676 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 387 transitions, 880 flow [2022-07-21 08:51:19,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 374.3) internal successors, (3743), 10 states have internal predecessors, (3743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:19,676 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:19,677 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] [2022-07-21 08:51:19,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:19,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:19,895 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:19,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:19,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1044128309, now seen corresponding path program 1 times [2022-07-21 08:51:19,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:19,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342364163] [2022-07-21 08:51:19,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:19,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:19,963 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:19,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:19,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342364163] [2022-07-21 08:51:19,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342364163] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:19,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307211947] [2022-07-21 08:51:19,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:19,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:19,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:19,965 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:19,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-21 08:51:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:20,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:51:20,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:20,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:20,259 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:20,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307211947] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:20,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:20,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:51:20,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046764583] [2022-07-21 08:51:20,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:20,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:51:20,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:20,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:51:20,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:51:20,276 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 372 out of 469 [2022-07-21 08:51:20,279 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 387 transitions, 880 flow. Second operand has 18 states, 18 states have (on average 374.6111111111111) internal successors, (6743), 18 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:20,279 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:20,279 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 372 of 469 [2022-07-21 08:51:20,279 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:20,538 INFO L129 PetriNetUnfolder]: 0/548 cut-off events. [2022-07-21 08:51:20,538 INFO L130 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2022-07-21 08:51:20,538 INFO L84 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 548 events. 0/548 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1557 event pairs, 0 based on Foata normal form. 4/552 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-07-21 08:51:20,539 INFO L132 encePairwiseOnDemand]: 463/469 looper letters, 30 selfloop transitions, 21 changer transitions 0/411 dead transitions. [2022-07-21 08:51:20,540 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 411 transitions, 1090 flow [2022-07-21 08:51:20,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:51:20,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:51:20,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7867 transitions. [2022-07-21 08:51:20,571 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7987612955630014 [2022-07-21 08:51:20,571 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7867 transitions. [2022-07-21 08:51:20,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7867 transitions. [2022-07-21 08:51:20,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:20,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7867 transitions. [2022-07-21 08:51:20,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 374.6190476190476) internal successors, (7867), 21 states have internal predecessors, (7867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:20,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 469.0) internal successors, (10318), 22 states have internal predecessors, (10318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:20,582 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 469.0) internal successors, (10318), 22 states have internal predecessors, (10318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:20,582 INFO L186 Difference]: Start difference. First operand has 418 places, 387 transitions, 880 flow. Second operand 21 states and 7867 transitions. [2022-07-21 08:51:20,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 411 transitions, 1090 flow [2022-07-21 08:51:20,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 411 transitions, 1076 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:20,589 INFO L242 Difference]: Finished difference. Result has 442 places, 400 transitions, 1004 flow [2022-07-21 08:51:20,590 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1004, PETRI_PLACES=442, PETRI_TRANSITIONS=400} [2022-07-21 08:51:20,590 INFO L279 CegarLoopForPetriNet]: 418 programPoint places, 24 predicate places. [2022-07-21 08:51:20,590 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 400 transitions, 1004 flow [2022-07-21 08:51:20,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 374.6111111111111) internal successors, (6743), 18 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:20,591 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:20,591 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:20,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:20,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:20,809 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:20,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:20,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1480392363, now seen corresponding path program 1 times [2022-07-21 08:51:20,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:20,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51504543] [2022-07-21 08:51:20,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:20,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:20,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:20,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:20,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51504543] [2022-07-21 08:51:20,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51504543] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:20,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264636993] [2022-07-21 08:51:20,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:20,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:20,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:20,938 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:20,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-21 08:51:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:21,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:51:21,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:21,172 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:21,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:21,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264636993] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:21,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:21,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:51:21,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955261940] [2022-07-21 08:51:21,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:21,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:51:21,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:21,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:51:21,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:51:21,425 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 372 out of 469 [2022-07-21 08:51:21,429 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 400 transitions, 1004 flow. Second operand has 34 states, 34 states have (on average 374.79411764705884) internal successors, (12743), 34 states have internal predecessors, (12743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:21,430 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:21,430 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 372 of 469 [2022-07-21 08:51:21,430 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:21,919 INFO L129 PetriNetUnfolder]: 0/470 cut-off events. [2022-07-21 08:51:21,919 INFO L130 PetriNetUnfolder]: For 195/195 co-relation queries the response was YES. [2022-07-21 08:51:21,919 INFO L84 FinitePrefix]: Finished finitePrefix Result has 741 conditions, 470 events. 0/470 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1071 event pairs, 0 based on Foata normal form. 6/476 useless extension candidates. Maximal degree in co-relation 0. Up to 21 conditions per place. [2022-07-21 08:51:21,920 INFO L132 encePairwiseOnDemand]: 464/469 looper letters, 39 selfloop transitions, 37 changer transitions 0/424 dead transitions. [2022-07-21 08:51:21,920 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 424 transitions, 1332 flow [2022-07-21 08:51:21,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-21 08:51:21,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-21 08:51:21,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 14590 transitions. [2022-07-21 08:51:21,929 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7976600513913946 [2022-07-21 08:51:21,929 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 14590 transitions. [2022-07-21 08:51:21,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 14590 transitions. [2022-07-21 08:51:21,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:21,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 14590 transitions. [2022-07-21 08:51:21,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 374.1025641025641) internal successors, (14590), 39 states have internal predecessors, (14590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:21,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 469.0) internal successors, (18760), 40 states have internal predecessors, (18760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:21,952 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 469.0) internal successors, (18760), 40 states have internal predecessors, (18760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:21,952 INFO L186 Difference]: Start difference. First operand has 442 places, 400 transitions, 1004 flow. Second operand 39 states and 14590 transitions. [2022-07-21 08:51:21,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 424 transitions, 1332 flow [2022-07-21 08:51:21,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 424 transitions, 1254 flow, removed 11 selfloop flow, removed 13 redundant places. [2022-07-21 08:51:21,961 INFO L242 Difference]: Finished difference. Result has 454 places, 402 transitions, 1083 flow [2022-07-21 08:51:21,961 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1083, PETRI_PLACES=454, PETRI_TRANSITIONS=402} [2022-07-21 08:51:21,962 INFO L279 CegarLoopForPetriNet]: 418 programPoint places, 36 predicate places. [2022-07-21 08:51:21,962 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 402 transitions, 1083 flow [2022-07-21 08:51:21,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 374.79411764705884) internal successors, (12743), 34 states have internal predecessors, (12743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:21,963 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:21,963 INFO L200 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:21,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:22,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-07-21 08:51:22,181 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:22,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:22,181 INFO L85 PathProgramCache]: Analyzing trace with hash 176240361, now seen corresponding path program 1 times [2022-07-21 08:51:22,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:22,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57055812] [2022-07-21 08:51:22,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:22,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:22,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:22,204 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:22,226 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:22,226 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:22,227 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:22,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:22,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-07-21 08:51:22,227 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-21 08:51:22,227 WARN L231 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:22,227 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2022-07-21 08:51:22,252 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:51:22,255 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 447 places, 502 transitions, 1225 flow [2022-07-21 08:51:22,418 INFO L129 PetriNetUnfolder]: 134/1004 cut-off events. [2022-07-21 08:51:22,419 INFO L130 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2022-07-21 08:51:22,449 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 1004 events. 134/1004 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3710 event pairs, 0 based on Foata normal form. 0/842 useless extension candidates. Maximal degree in co-relation 1021. Up to 28 conditions per place. [2022-07-21 08:51:22,450 INFO L82 GeneralOperation]: Start removeDead. Operand has 447 places, 502 transitions, 1225 flow [2022-07-21 08:51:22,463 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 447 places, 502 transitions, 1225 flow [2022-07-21 08:51:22,464 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:22,464 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:51:22,465 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:22,468 INFO L129 PetriNetUnfolder]: 5/92 cut-off events. [2022-07-21 08:51:22,468 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:22,468 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:22,468 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] [2022-07-21 08:51:22,468 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:22,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:22,469 INFO L85 PathProgramCache]: Analyzing trace with hash -417816633, now seen corresponding path program 1 times [2022-07-21 08:51:22,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:22,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82105855] [2022-07-21 08:51:22,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:22,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:22,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:22,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:22,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82105855] [2022-07-21 08:51:22,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82105855] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:22,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:22,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:22,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443622130] [2022-07-21 08:51:22,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:22,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:22,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:22,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:22,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:22,483 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 399 out of 502 [2022-07-21 08:51:22,483 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 502 transitions, 1225 flow. Second operand has 3 states, 3 states have (on average 400.0) internal successors, (1200), 3 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:22,483 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:22,483 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 399 of 502 [2022-07-21 08:51:22,483 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:22,733 INFO L129 PetriNetUnfolder]: 0/831 cut-off events. [2022-07-21 08:51:22,733 INFO L130 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2022-07-21 08:51:22,734 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1045 conditions, 831 events. 0/831 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3298 event pairs, 0 based on Foata normal form. 2820/3625 useless extension candidates. Maximal degree in co-relation 0. Up to 78 conditions per place. [2022-07-21 08:51:22,735 INFO L132 encePairwiseOnDemand]: 417/502 looper letters, 22 selfloop transitions, 2 changer transitions 12/423 dead transitions. [2022-07-21 08:51:22,735 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 423 transitions, 1115 flow [2022-07-21 08:51:22,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:22,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:22,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1311 transitions. [2022-07-21 08:51:22,736 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8705179282868526 [2022-07-21 08:51:22,736 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1311 transitions. [2022-07-21 08:51:22,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1311 transitions. [2022-07-21 08:51:22,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:22,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1311 transitions. [2022-07-21 08:51:22,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 437.0) internal successors, (1311), 3 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:22,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:22,738 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:22,739 INFO L186 Difference]: Start difference. First operand has 447 places, 502 transitions, 1225 flow. Second operand 3 states and 1311 transitions. [2022-07-21 08:51:22,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 423 transitions, 1115 flow [2022-07-21 08:51:22,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 423 transitions, 959 flow, removed 78 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:22,744 INFO L242 Difference]: Finished difference. Result has 449 places, 408 transitions, 891 flow [2022-07-21 08:51:22,744 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=891, PETRI_PLACES=449, PETRI_TRANSITIONS=408} [2022-07-21 08:51:22,745 INFO L279 CegarLoopForPetriNet]: 447 programPoint places, 2 predicate places. [2022-07-21 08:51:22,745 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 408 transitions, 891 flow [2022-07-21 08:51:22,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 400.0) internal successors, (1200), 3 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:22,745 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:22,745 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:22,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-07-21 08:51:22,746 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:22,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:22,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1901634592, now seen corresponding path program 1 times [2022-07-21 08:51:22,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:22,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510011867] [2022-07-21 08:51:22,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:22,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:22,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:22,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:22,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510011867] [2022-07-21 08:51:22,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510011867] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:22,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234425545] [2022-07-21 08:51:22,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:22,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:22,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:22,774 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:22,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-21 08:51:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:22,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:22,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:22,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:23,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234425545] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:23,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:23,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:23,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665918110] [2022-07-21 08:51:23,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:23,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:23,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:23,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:23,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:23,022 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 398 out of 502 [2022-07-21 08:51:23,023 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 408 transitions, 891 flow. Second operand has 10 states, 10 states have (on average 400.3) internal successors, (4003), 10 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:23,024 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:23,024 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 398 of 502 [2022-07-21 08:51:23,024 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:23,226 INFO L129 PetriNetUnfolder]: 0/649 cut-off events. [2022-07-21 08:51:23,226 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-07-21 08:51:23,226 INFO L84 FinitePrefix]: Finished finitePrefix Result has 824 conditions, 649 events. 0/649 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2085 event pairs, 0 based on Foata normal form. 2/651 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2022-07-21 08:51:23,228 INFO L132 encePairwiseOnDemand]: 496/502 looper letters, 23 selfloop transitions, 9 changer transitions 0/418 dead transitions. [2022-07-21 08:51:23,228 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 418 transitions, 977 flow [2022-07-21 08:51:23,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:23,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:23,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3616 transitions. [2022-07-21 08:51:23,230 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8003541389995573 [2022-07-21 08:51:23,230 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3616 transitions. [2022-07-21 08:51:23,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3616 transitions. [2022-07-21 08:51:23,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:23,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3616 transitions. [2022-07-21 08:51:23,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 401.77777777777777) internal successors, (3616), 9 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:23,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 502.0) internal successors, (5020), 10 states have internal predecessors, (5020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:23,236 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 502.0) internal successors, (5020), 10 states have internal predecessors, (5020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:23,236 INFO L186 Difference]: Start difference. First operand has 449 places, 408 transitions, 891 flow. Second operand 9 states and 3616 transitions. [2022-07-21 08:51:23,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 418 transitions, 977 flow [2022-07-21 08:51:23,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 418 transitions, 975 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:23,242 INFO L242 Difference]: Finished difference. Result has 447 places, 414 transitions, 939 flow [2022-07-21 08:51:23,242 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=939, PETRI_PLACES=447, PETRI_TRANSITIONS=414} [2022-07-21 08:51:23,243 INFO L279 CegarLoopForPetriNet]: 447 programPoint places, 0 predicate places. [2022-07-21 08:51:23,243 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 414 transitions, 939 flow [2022-07-21 08:51:23,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 400.3) internal successors, (4003), 10 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:23,243 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:23,244 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] [2022-07-21 08:51:23,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:23,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-21 08:51:23,462 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:23,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:23,462 INFO L85 PathProgramCache]: Analyzing trace with hash -171060459, now seen corresponding path program 1 times [2022-07-21 08:51:23,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:23,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077725971] [2022-07-21 08:51:23,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:23,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:23,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:23,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:23,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077725971] [2022-07-21 08:51:23,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077725971] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:23,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893602513] [2022-07-21 08:51:23,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:23,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:23,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:23,540 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:23,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-21 08:51:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:23,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:51:23,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:23,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:23,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893602513] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:23,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:23,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:51:23,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362933734] [2022-07-21 08:51:23,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:23,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:51:23,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:23,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:51:23,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:51:23,846 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 398 out of 502 [2022-07-21 08:51:23,848 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 414 transitions, 939 flow. Second operand has 18 states, 18 states have (on average 400.6111111111111) internal successors, (7211), 18 states have internal predecessors, (7211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:23,848 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:23,848 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 398 of 502 [2022-07-21 08:51:23,849 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:24,181 INFO L129 PetriNetUnfolder]: 0/597 cut-off events. [2022-07-21 08:51:24,182 INFO L130 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-07-21 08:51:24,182 INFO L84 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 597 events. 0/597 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1739 event pairs, 0 based on Foata normal form. 4/601 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-07-21 08:51:24,183 INFO L132 encePairwiseOnDemand]: 496/502 looper letters, 31 selfloop transitions, 21 changer transitions 0/438 dead transitions. [2022-07-21 08:51:24,183 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 438 transitions, 1151 flow [2022-07-21 08:51:24,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:51:24,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:51:24,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 8414 transitions. [2022-07-21 08:51:24,187 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.798140770252324 [2022-07-21 08:51:24,188 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 8414 transitions. [2022-07-21 08:51:24,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 8414 transitions. [2022-07-21 08:51:24,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:24,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 8414 transitions. [2022-07-21 08:51:24,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 400.6666666666667) internal successors, (8414), 21 states have internal predecessors, (8414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:24,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 502.0) internal successors, (11044), 22 states have internal predecessors, (11044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:24,200 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 502.0) internal successors, (11044), 22 states have internal predecessors, (11044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:24,200 INFO L186 Difference]: Start difference. First operand has 447 places, 414 transitions, 939 flow. Second operand 21 states and 8414 transitions. [2022-07-21 08:51:24,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 438 transitions, 1151 flow [2022-07-21 08:51:24,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 438 transitions, 1137 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:24,207 INFO L242 Difference]: Finished difference. Result has 471 places, 427 transitions, 1063 flow [2022-07-21 08:51:24,207 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1063, PETRI_PLACES=471, PETRI_TRANSITIONS=427} [2022-07-21 08:51:24,209 INFO L279 CegarLoopForPetriNet]: 447 programPoint places, 24 predicate places. [2022-07-21 08:51:24,209 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 427 transitions, 1063 flow [2022-07-21 08:51:24,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 400.6111111111111) internal successors, (7211), 18 states have internal predecessors, (7211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:24,210 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:24,210 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:24,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:24,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-21 08:51:24,428 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:24,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:24,428 INFO L85 PathProgramCache]: Analyzing trace with hash 767133451, now seen corresponding path program 1 times [2022-07-21 08:51:24,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:24,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005162024] [2022-07-21 08:51:24,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:24,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:24,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:24,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005162024] [2022-07-21 08:51:24,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005162024] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:24,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112705897] [2022-07-21 08:51:24,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:24,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:24,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:24,549 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:24,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-21 08:51:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:24,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:51:24,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:24,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:25,034 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:25,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112705897] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:25,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:25,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:51:25,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132978037] [2022-07-21 08:51:25,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:25,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:51:25,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:25,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:51:25,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:51:25,040 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 398 out of 502 [2022-07-21 08:51:25,045 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 427 transitions, 1063 flow. Second operand has 34 states, 34 states have (on average 400.79411764705884) internal successors, (13627), 34 states have internal predecessors, (13627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:25,045 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:25,045 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 398 of 502 [2022-07-21 08:51:25,045 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:25,543 INFO L129 PetriNetUnfolder]: 0/506 cut-off events. [2022-07-21 08:51:25,543 INFO L130 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2022-07-21 08:51:25,544 INFO L84 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 506 events. 0/506 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1169 event pairs, 0 based on Foata normal form. 7/513 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-07-21 08:51:25,545 INFO L132 encePairwiseOnDemand]: 497/502 looper letters, 42 selfloop transitions, 40 changer transitions 0/456 dead transitions. [2022-07-21 08:51:25,545 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 456 transitions, 1437 flow [2022-07-21 08:51:25,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-21 08:51:25,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-07-21 08:51:25,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 16805 transitions. [2022-07-21 08:51:25,553 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7970498956554734 [2022-07-21 08:51:25,554 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 16805 transitions. [2022-07-21 08:51:25,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 16805 transitions. [2022-07-21 08:51:25,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:25,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 16805 transitions. [2022-07-21 08:51:25,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 400.1190476190476) internal successors, (16805), 42 states have internal predecessors, (16805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:25,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 502.0) internal successors, (21586), 43 states have internal predecessors, (21586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:25,640 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 502.0) internal successors, (21586), 43 states have internal predecessors, (21586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:25,640 INFO L186 Difference]: Start difference. First operand has 471 places, 427 transitions, 1063 flow. Second operand 42 states and 16805 transitions. [2022-07-21 08:51:25,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 456 transitions, 1437 flow [2022-07-21 08:51:25,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 456 transitions, 1353 flow, removed 12 selfloop flow, removed 13 redundant places. [2022-07-21 08:51:25,646 INFO L242 Difference]: Finished difference. Result has 486 places, 432 transitions, 1166 flow [2022-07-21 08:51:25,647 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1166, PETRI_PLACES=486, PETRI_TRANSITIONS=432} [2022-07-21 08:51:25,647 INFO L279 CegarLoopForPetriNet]: 447 programPoint places, 39 predicate places. [2022-07-21 08:51:25,647 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 432 transitions, 1166 flow [2022-07-21 08:51:25,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 400.79411764705884) internal successors, (13627), 34 states have internal predecessors, (13627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:25,649 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:25,649 INFO L200 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:25,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:25,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:25,867 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:25,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:25,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1834102098, now seen corresponding path program 1 times [2022-07-21 08:51:25,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:25,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112335071] [2022-07-21 08:51:25,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:25,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:25,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:25,887 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:25,924 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:25,924 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:25,924 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:25,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:25,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-07-21 08:51:25,925 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-21 08:51:25,925 WARN L231 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:25,925 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2022-07-21 08:51:25,961 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:51:25,964 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 476 places, 535 transitions, 1322 flow [2022-07-21 08:51:26,154 INFO L129 PetriNetUnfolder]: 144/1076 cut-off events. [2022-07-21 08:51:26,154 INFO L130 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-07-21 08:51:26,191 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1224 conditions, 1076 events. 144/1076 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4007 event pairs, 0 based on Foata normal form. 0/902 useless extension candidates. Maximal degree in co-relation 1107. Up to 30 conditions per place. [2022-07-21 08:51:26,191 INFO L82 GeneralOperation]: Start removeDead. Operand has 476 places, 535 transitions, 1322 flow [2022-07-21 08:51:26,207 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 476 places, 535 transitions, 1322 flow [2022-07-21 08:51:26,207 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:26,207 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:51:26,208 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:26,211 INFO L129 PetriNetUnfolder]: 4/91 cut-off events. [2022-07-21 08:51:26,211 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:26,211 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:26,211 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:26,211 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:26,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:26,211 INFO L85 PathProgramCache]: Analyzing trace with hash -51559578, now seen corresponding path program 1 times [2022-07-21 08:51:26,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:26,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513721770] [2022-07-21 08:51:26,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:26,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:26,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:26,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:26,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:26,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513721770] [2022-07-21 08:51:26,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513721770] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:26,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:26,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:51:26,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697580171] [2022-07-21 08:51:26,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:26,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:51:26,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:26,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:51:26,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:51:26,223 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 432 out of 535 [2022-07-21 08:51:26,223 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 535 transitions, 1322 flow. Second operand has 2 states, 2 states have (on average 432.5) internal successors, (865), 2 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:26,223 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:26,224 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 432 of 535 [2022-07-21 08:51:26,224 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:26,431 INFO L129 PetriNetUnfolder]: 0/917 cut-off events. [2022-07-21 08:51:26,432 INFO L130 PetriNetUnfolder]: For 651/651 co-relation queries the response was YES. [2022-07-21 08:51:26,432 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1080 conditions, 917 events. 0/917 cut-off events. For 651/651 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3663 event pairs, 0 based on Foata normal form. 614/1501 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-21 08:51:26,433 INFO L132 encePairwiseOnDemand]: 447/535 looper letters, 14 selfloop transitions, 0 changer transitions 12/446 dead transitions. [2022-07-21 08:51:26,433 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 446 transitions, 1172 flow [2022-07-21 08:51:26,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:51:26,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:51:26,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 966 transitions. [2022-07-21 08:51:26,435 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.902803738317757 [2022-07-21 08:51:26,435 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 966 transitions. [2022-07-21 08:51:26,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 966 transitions. [2022-07-21 08:51:26,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:26,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 966 transitions. [2022-07-21 08:51:26,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 483.0) internal successors, (966), 2 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:26,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 535.0) internal successors, (1605), 3 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:26,437 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 535.0) internal successors, (1605), 3 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:26,437 INFO L186 Difference]: Start difference. First operand has 476 places, 535 transitions, 1322 flow. Second operand 2 states and 966 transitions. [2022-07-21 08:51:26,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 446 transitions, 1172 flow [2022-07-21 08:51:26,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 446 transitions, 990 flow, removed 91 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:26,443 INFO L242 Difference]: Finished difference. Result has 476 places, 434 transitions, 938 flow [2022-07-21 08:51:26,443 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=938, PETRI_PLACES=476, PETRI_TRANSITIONS=434} [2022-07-21 08:51:26,443 INFO L279 CegarLoopForPetriNet]: 476 programPoint places, 0 predicate places. [2022-07-21 08:51:26,443 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 434 transitions, 938 flow [2022-07-21 08:51:26,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 432.5) internal successors, (865), 2 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:26,444 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:26,444 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] [2022-07-21 08:51:26,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-07-21 08:51:26,444 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:26,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:26,444 INFO L85 PathProgramCache]: Analyzing trace with hash -344962585, now seen corresponding path program 1 times [2022-07-21 08:51:26,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:26,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502225098] [2022-07-21 08:51:26,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:26,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:26,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:26,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:26,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:26,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502225098] [2022-07-21 08:51:26,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502225098] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:26,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:26,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:26,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284380040] [2022-07-21 08:51:26,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:26,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:26,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:26,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:26,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:26,460 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 425 out of 535 [2022-07-21 08:51:26,461 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 434 transitions, 938 flow. Second operand has 3 states, 3 states have (on average 426.0) internal successors, (1278), 3 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:26,461 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:26,461 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 425 of 535 [2022-07-21 08:51:26,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:26,648 INFO L129 PetriNetUnfolder]: 0/724 cut-off events. [2022-07-21 08:51:26,648 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-07-21 08:51:26,649 INFO L84 FinitePrefix]: Finished finitePrefix Result has 871 conditions, 724 events. 0/724 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2417 event pairs, 0 based on Foata normal form. 0/710 useless extension candidates. Maximal degree in co-relation 0. Up to 84 conditions per place. [2022-07-21 08:51:26,650 INFO L132 encePairwiseOnDemand]: 532/535 looper letters, 23 selfloop transitions, 2 changer transitions 0/438 dead transitions. [2022-07-21 08:51:26,650 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 438 transitions, 996 flow [2022-07-21 08:51:26,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:26,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:26,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1301 transitions. [2022-07-21 08:51:26,651 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8105919003115265 [2022-07-21 08:51:26,651 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1301 transitions. [2022-07-21 08:51:26,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1301 transitions. [2022-07-21 08:51:26,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:26,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1301 transitions. [2022-07-21 08:51:26,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 433.6666666666667) internal successors, (1301), 3 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:26,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 535.0) internal successors, (2140), 4 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:26,654 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 535.0) internal successors, (2140), 4 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:26,654 INFO L186 Difference]: Start difference. First operand has 476 places, 434 transitions, 938 flow. Second operand 3 states and 1301 transitions. [2022-07-21 08:51:26,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 438 transitions, 996 flow [2022-07-21 08:51:26,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 438 transitions, 996 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:26,659 INFO L242 Difference]: Finished difference. Result has 467 places, 435 transitions, 950 flow [2022-07-21 08:51:26,659 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=950, PETRI_PLACES=467, PETRI_TRANSITIONS=435} [2022-07-21 08:51:26,660 INFO L279 CegarLoopForPetriNet]: 476 programPoint places, -9 predicate places. [2022-07-21 08:51:26,660 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 435 transitions, 950 flow [2022-07-21 08:51:26,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 426.0) internal successors, (1278), 3 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:26,660 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:26,660 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:26,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-07-21 08:51:26,661 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:26,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:26,661 INFO L85 PathProgramCache]: Analyzing trace with hash 438271168, now seen corresponding path program 1 times [2022-07-21 08:51:26,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:26,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648658345] [2022-07-21 08:51:26,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:26,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:26,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:26,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:26,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648658345] [2022-07-21 08:51:26,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648658345] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:26,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521067059] [2022-07-21 08:51:26,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:26,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:26,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:26,683 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:26,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-21 08:51:26,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:26,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:26,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:26,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:26,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:26,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521067059] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:26,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:26,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:26,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693983805] [2022-07-21 08:51:26,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:26,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:26,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:26,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:26,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:26,947 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 424 out of 535 [2022-07-21 08:51:26,948 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 435 transitions, 950 flow. Second operand has 10 states, 10 states have (on average 426.3) internal successors, (4263), 10 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:26,949 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:26,949 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 424 of 535 [2022-07-21 08:51:26,949 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:27,153 INFO L129 PetriNetUnfolder]: 0/698 cut-off events. [2022-07-21 08:51:27,154 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-21 08:51:27,154 INFO L84 FinitePrefix]: Finished finitePrefix Result has 887 conditions, 698 events. 0/698 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2266 event pairs, 0 based on Foata normal form. 2/700 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2022-07-21 08:51:27,155 INFO L132 encePairwiseOnDemand]: 529/535 looper letters, 24 selfloop transitions, 9 changer transitions 0/445 dead transitions. [2022-07-21 08:51:27,155 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 445 transitions, 1038 flow [2022-07-21 08:51:27,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:27,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:27,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3851 transitions. [2022-07-21 08:51:27,159 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7997923156801662 [2022-07-21 08:51:27,159 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3851 transitions. [2022-07-21 08:51:27,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3851 transitions. [2022-07-21 08:51:27,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:27,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3851 transitions. [2022-07-21 08:51:27,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 427.8888888888889) internal successors, (3851), 9 states have internal predecessors, (3851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:27,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 535.0) internal successors, (5350), 10 states have internal predecessors, (5350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:27,164 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 535.0) internal successors, (5350), 10 states have internal predecessors, (5350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:27,164 INFO L186 Difference]: Start difference. First operand has 467 places, 435 transitions, 950 flow. Second operand 9 states and 3851 transitions. [2022-07-21 08:51:27,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 445 transitions, 1038 flow [2022-07-21 08:51:27,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 445 transitions, 1036 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:27,170 INFO L242 Difference]: Finished difference. Result has 477 places, 441 transitions, 998 flow [2022-07-21 08:51:27,170 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=998, PETRI_PLACES=477, PETRI_TRANSITIONS=441} [2022-07-21 08:51:27,171 INFO L279 CegarLoopForPetriNet]: 476 programPoint places, 1 predicate places. [2022-07-21 08:51:27,171 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 441 transitions, 998 flow [2022-07-21 08:51:27,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 426.3) internal successors, (4263), 10 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:27,171 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:27,171 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] [2022-07-21 08:51:27,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:27,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:27,389 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:27,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:27,389 INFO L85 PathProgramCache]: Analyzing trace with hash 776120501, now seen corresponding path program 1 times [2022-07-21 08:51:27,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:27,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68444932] [2022-07-21 08:51:27,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:27,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:27,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:27,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68444932] [2022-07-21 08:51:27,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68444932] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:27,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019803774] [2022-07-21 08:51:27,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:27,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:27,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:27,436 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:27,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-21 08:51:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:27,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:51:27,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:27,675 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:27,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:27,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019803774] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:27,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:27,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:51:27,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332721951] [2022-07-21 08:51:27,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:27,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:51:27,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:27,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:51:27,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:51:27,751 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 424 out of 535 [2022-07-21 08:51:27,753 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 441 transitions, 998 flow. Second operand has 18 states, 18 states have (on average 426.6111111111111) internal successors, (7679), 18 states have internal predecessors, (7679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:27,753 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:27,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 424 of 535 [2022-07-21 08:51:27,754 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:28,039 INFO L129 PetriNetUnfolder]: 0/646 cut-off events. [2022-07-21 08:51:28,039 INFO L130 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2022-07-21 08:51:28,040 INFO L84 FinitePrefix]: Finished finitePrefix Result has 928 conditions, 646 events. 0/646 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1925 event pairs, 0 based on Foata normal form. 4/650 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-07-21 08:51:28,041 INFO L132 encePairwiseOnDemand]: 529/535 looper letters, 32 selfloop transitions, 21 changer transitions 0/465 dead transitions. [2022-07-21 08:51:28,041 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 465 transitions, 1212 flow [2022-07-21 08:51:28,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:51:28,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:51:28,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 8961 transitions. [2022-07-21 08:51:28,046 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7975967957276369 [2022-07-21 08:51:28,046 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 8961 transitions. [2022-07-21 08:51:28,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 8961 transitions. [2022-07-21 08:51:28,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:28,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 8961 transitions. [2022-07-21 08:51:28,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 426.7142857142857) internal successors, (8961), 21 states have internal predecessors, (8961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:28,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 535.0) internal successors, (11770), 22 states have internal predecessors, (11770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:28,060 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 535.0) internal successors, (11770), 22 states have internal predecessors, (11770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:28,060 INFO L186 Difference]: Start difference. First operand has 477 places, 441 transitions, 998 flow. Second operand 21 states and 8961 transitions. [2022-07-21 08:51:28,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 465 transitions, 1212 flow [2022-07-21 08:51:28,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 465 transitions, 1198 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:28,066 INFO L242 Difference]: Finished difference. Result has 501 places, 454 transitions, 1122 flow [2022-07-21 08:51:28,067 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=992, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1122, PETRI_PLACES=501, PETRI_TRANSITIONS=454} [2022-07-21 08:51:28,067 INFO L279 CegarLoopForPetriNet]: 476 programPoint places, 25 predicate places. [2022-07-21 08:51:28,067 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 454 transitions, 1122 flow [2022-07-21 08:51:28,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 426.6111111111111) internal successors, (7679), 18 states have internal predecessors, (7679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:28,068 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:28,069 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:28,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:28,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-07-21 08:51:28,282 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:28,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:28,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1898501803, now seen corresponding path program 1 times [2022-07-21 08:51:28,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:28,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196455117] [2022-07-21 08:51:28,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:28,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:28,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:28,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196455117] [2022-07-21 08:51:28,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196455117] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:28,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789440159] [2022-07-21 08:51:28,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:28,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:28,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:28,411 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:28,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-21 08:51:28,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:28,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:51:28,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:28,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:28,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789440159] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:28,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:28,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:51:28,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995367792] [2022-07-21 08:51:28,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:28,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:51:28,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:28,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:51:28,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:51:28,926 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 424 out of 535 [2022-07-21 08:51:28,930 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 454 transitions, 1122 flow. Second operand has 34 states, 34 states have (on average 426.79411764705884) internal successors, (14511), 34 states have internal predecessors, (14511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:28,930 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:28,931 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 424 of 535 [2022-07-21 08:51:28,931 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:29,484 INFO L129 PetriNetUnfolder]: 0/542 cut-off events. [2022-07-21 08:51:29,485 INFO L130 PetriNetUnfolder]: For 249/249 co-relation queries the response was YES. [2022-07-21 08:51:29,485 INFO L84 FinitePrefix]: Finished finitePrefix Result has 858 conditions, 542 events. 0/542 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1267 event pairs, 0 based on Foata normal form. 8/550 useless extension candidates. Maximal degree in co-relation 0. Up to 25 conditions per place. [2022-07-21 08:51:29,486 INFO L132 encePairwiseOnDemand]: 530/535 looper letters, 45 selfloop transitions, 43 changer transitions 0/488 dead transitions. [2022-07-21 08:51:29,486 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 488 transitions, 1542 flow [2022-07-21 08:51:29,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 08:51:29,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-21 08:51:29,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 19176 transitions. [2022-07-21 08:51:29,495 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7965109034267913 [2022-07-21 08:51:29,495 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 19176 transitions. [2022-07-21 08:51:29,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 19176 transitions. [2022-07-21 08:51:29,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:29,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 19176 transitions. [2022-07-21 08:51:29,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 426.1333333333333) internal successors, (19176), 45 states have internal predecessors, (19176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:29,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 535.0) internal successors, (24610), 46 states have internal predecessors, (24610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:29,520 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 535.0) internal successors, (24610), 46 states have internal predecessors, (24610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:29,521 INFO L186 Difference]: Start difference. First operand has 501 places, 454 transitions, 1122 flow. Second operand 45 states and 19176 transitions. [2022-07-21 08:51:29,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 488 transitions, 1542 flow [2022-07-21 08:51:29,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 488 transitions, 1452 flow, removed 13 selfloop flow, removed 13 redundant places. [2022-07-21 08:51:29,528 INFO L242 Difference]: Finished difference. Result has 519 places, 462 transitions, 1249 flow [2022-07-21 08:51:29,528 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1249, PETRI_PLACES=519, PETRI_TRANSITIONS=462} [2022-07-21 08:51:29,528 INFO L279 CegarLoopForPetriNet]: 476 programPoint places, 43 predicate places. [2022-07-21 08:51:29,528 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 462 transitions, 1249 flow [2022-07-21 08:51:29,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 426.79411764705884) internal successors, (14511), 34 states have internal predecessors, (14511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:29,530 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:29,530 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:29,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-07-21 08:51:29,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:29,747 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:29,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:29,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1167770068, now seen corresponding path program 1 times [2022-07-21 08:51:29,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:29,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902658870] [2022-07-21 08:51:29,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:29,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:29,791 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:29,829 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:29,829 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:29,829 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:29,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:29,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-07-21 08:51:29,830 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 08:51:29,831 WARN L231 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:29,831 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2022-07-21 08:51:29,863 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:51:29,866 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 505 places, 568 transitions, 1421 flow [2022-07-21 08:51:30,090 INFO L129 PetriNetUnfolder]: 154/1148 cut-off events. [2022-07-21 08:51:30,090 INFO L130 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2022-07-21 08:51:30,141 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1314 conditions, 1148 events. 154/1148 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4321 event pairs, 0 based on Foata normal form. 0/962 useless extension candidates. Maximal degree in co-relation 1196. Up to 32 conditions per place. [2022-07-21 08:51:30,141 INFO L82 GeneralOperation]: Start removeDead. Operand has 505 places, 568 transitions, 1421 flow [2022-07-21 08:51:30,159 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 505 places, 568 transitions, 1421 flow [2022-07-21 08:51:30,160 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:30,160 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:51:30,160 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:30,164 INFO L129 PetriNetUnfolder]: 5/93 cut-off events. [2022-07-21 08:51:30,164 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:30,164 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:30,164 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] [2022-07-21 08:51:30,165 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:30,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:30,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1466428135, now seen corresponding path program 1 times [2022-07-21 08:51:30,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:30,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673966251] [2022-07-21 08:51:30,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:30,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:30,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:30,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:30,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673966251] [2022-07-21 08:51:30,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673966251] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:30,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:30,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:30,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163575737] [2022-07-21 08:51:30,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:30,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:30,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:30,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:30,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:30,184 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 451 out of 568 [2022-07-21 08:51:30,184 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 568 transitions, 1421 flow. Second operand has 3 states, 3 states have (on average 452.0) internal successors, (1356), 3 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:30,184 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:30,184 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 451 of 568 [2022-07-21 08:51:30,185 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:30,442 INFO L129 PetriNetUnfolder]: 0/953 cut-off events. [2022-07-21 08:51:30,442 INFO L130 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2022-07-21 08:51:30,443 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1214 conditions, 953 events. 0/953 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3853 event pairs, 0 based on Foata normal form. 3789/4712 useless extension candidates. Maximal degree in co-relation 0. Up to 90 conditions per place. [2022-07-21 08:51:30,444 INFO L132 encePairwiseOnDemand]: 471/568 looper letters, 24 selfloop transitions, 2 changer transitions 12/477 dead transitions. [2022-07-21 08:51:30,445 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 477 transitions, 1291 flow [2022-07-21 08:51:30,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:30,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:30,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1481 transitions. [2022-07-21 08:51:30,446 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.869131455399061 [2022-07-21 08:51:30,446 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1481 transitions. [2022-07-21 08:51:30,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1481 transitions. [2022-07-21 08:51:30,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:30,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1481 transitions. [2022-07-21 08:51:30,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 493.6666666666667) internal successors, (1481), 3 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:30,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 568.0) internal successors, (2272), 4 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:30,449 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 568.0) internal successors, (2272), 4 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:30,449 INFO L186 Difference]: Start difference. First operand has 505 places, 568 transitions, 1421 flow. Second operand 3 states and 1481 transitions. [2022-07-21 08:51:30,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 477 transitions, 1291 flow [2022-07-21 08:51:30,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 477 transitions, 1081 flow, removed 105 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:30,455 INFO L242 Difference]: Finished difference. Result has 507 places, 462 transitions, 1009 flow [2022-07-21 08:51:30,456 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1009, PETRI_PLACES=507, PETRI_TRANSITIONS=462} [2022-07-21 08:51:30,456 INFO L279 CegarLoopForPetriNet]: 505 programPoint places, 2 predicate places. [2022-07-21 08:51:30,456 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 462 transitions, 1009 flow [2022-07-21 08:51:30,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 452.0) internal successors, (1356), 3 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:30,457 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:30,457 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:30,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-07-21 08:51:30,457 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:30,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:30,458 INFO L85 PathProgramCache]: Analyzing trace with hash -2049574688, now seen corresponding path program 1 times [2022-07-21 08:51:30,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:30,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266158560] [2022-07-21 08:51:30,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:30,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:30,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:30,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266158560] [2022-07-21 08:51:30,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266158560] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:30,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916042912] [2022-07-21 08:51:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:30,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:30,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:30,496 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:30,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-21 08:51:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:30,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:30,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:30,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:30,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:30,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916042912] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:30,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:30,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:30,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820454340] [2022-07-21 08:51:30,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:30,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:30,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:30,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:30,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:30,794 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 450 out of 568 [2022-07-21 08:51:30,796 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 462 transitions, 1009 flow. Second operand has 10 states, 10 states have (on average 452.3) internal successors, (4523), 10 states have internal predecessors, (4523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:30,796 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:30,796 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 450 of 568 [2022-07-21 08:51:30,796 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:31,018 INFO L129 PetriNetUnfolder]: 0/747 cut-off events. [2022-07-21 08:51:31,019 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-21 08:51:31,019 INFO L84 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 747 events. 0/747 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2447 event pairs, 0 based on Foata normal form. 2/749 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2022-07-21 08:51:31,020 INFO L132 encePairwiseOnDemand]: 562/568 looper letters, 25 selfloop transitions, 9 changer transitions 0/472 dead transitions. [2022-07-21 08:51:31,020 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 472 transitions, 1099 flow [2022-07-21 08:51:31,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:31,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:31,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4086 transitions. [2022-07-21 08:51:31,023 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7992957746478874 [2022-07-21 08:51:31,023 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4086 transitions. [2022-07-21 08:51:31,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4086 transitions. [2022-07-21 08:51:31,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:31,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4086 transitions. [2022-07-21 08:51:31,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 454.0) internal successors, (4086), 9 states have internal predecessors, (4086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:31,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 568.0) internal successors, (5680), 10 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:31,028 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 568.0) internal successors, (5680), 10 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:31,028 INFO L186 Difference]: Start difference. First operand has 507 places, 462 transitions, 1009 flow. Second operand 9 states and 4086 transitions. [2022-07-21 08:51:31,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 472 transitions, 1099 flow [2022-07-21 08:51:31,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 472 transitions, 1097 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:31,034 INFO L242 Difference]: Finished difference. Result has 505 places, 468 transitions, 1057 flow [2022-07-21 08:51:31,034 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1057, PETRI_PLACES=505, PETRI_TRANSITIONS=468} [2022-07-21 08:51:31,035 INFO L279 CegarLoopForPetriNet]: 505 programPoint places, 0 predicate places. [2022-07-21 08:51:31,035 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 468 transitions, 1057 flow [2022-07-21 08:51:31,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 452.3) internal successors, (4523), 10 states have internal predecessors, (4523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:31,035 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:31,035 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] [2022-07-21 08:51:31,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-21 08:51:31,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:31,236 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:31,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:31,236 INFO L85 PathProgramCache]: Analyzing trace with hash -409296107, now seen corresponding path program 1 times [2022-07-21 08:51:31,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:31,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056074045] [2022-07-21 08:51:31,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:31,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:31,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:31,290 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:31,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:31,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056074045] [2022-07-21 08:51:31,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056074045] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:31,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755226901] [2022-07-21 08:51:31,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:31,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:31,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:31,295 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:31,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-21 08:51:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:31,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:51:31,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:31,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:31,648 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:31,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755226901] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:31,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:31,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:51:31,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149102976] [2022-07-21 08:51:31,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:31,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:51:31,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:31,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:51:31,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:51:31,654 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 450 out of 568 [2022-07-21 08:51:31,656 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 468 transitions, 1057 flow. Second operand has 18 states, 18 states have (on average 452.6111111111111) internal successors, (8147), 18 states have internal predecessors, (8147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:31,656 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:31,656 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 450 of 568 [2022-07-21 08:51:31,656 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:31,969 INFO L129 PetriNetUnfolder]: 0/695 cut-off events. [2022-07-21 08:51:31,969 INFO L130 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2022-07-21 08:51:31,970 INFO L84 FinitePrefix]: Finished finitePrefix Result has 997 conditions, 695 events. 0/695 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2103 event pairs, 0 based on Foata normal form. 4/699 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-07-21 08:51:31,971 INFO L132 encePairwiseOnDemand]: 562/568 looper letters, 33 selfloop transitions, 21 changer transitions 0/492 dead transitions. [2022-07-21 08:51:31,971 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 492 transitions, 1273 flow [2022-07-21 08:51:31,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:51:31,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:51:31,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 9508 transitions. [2022-07-21 08:51:31,976 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7971160295103957 [2022-07-21 08:51:31,976 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 9508 transitions. [2022-07-21 08:51:31,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 9508 transitions. [2022-07-21 08:51:31,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:31,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 9508 transitions. [2022-07-21 08:51:31,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 452.76190476190476) internal successors, (9508), 21 states have internal predecessors, (9508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:31,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 568.0) internal successors, (12496), 22 states have internal predecessors, (12496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:31,989 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 568.0) internal successors, (12496), 22 states have internal predecessors, (12496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:31,989 INFO L186 Difference]: Start difference. First operand has 505 places, 468 transitions, 1057 flow. Second operand 21 states and 9508 transitions. [2022-07-21 08:51:31,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 492 transitions, 1273 flow [2022-07-21 08:51:31,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 492 transitions, 1259 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:31,996 INFO L242 Difference]: Finished difference. Result has 529 places, 481 transitions, 1181 flow [2022-07-21 08:51:31,996 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1181, PETRI_PLACES=529, PETRI_TRANSITIONS=481} [2022-07-21 08:51:31,997 INFO L279 CegarLoopForPetriNet]: 505 programPoint places, 24 predicate places. [2022-07-21 08:51:31,997 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 481 transitions, 1181 flow [2022-07-21 08:51:31,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 452.6111111111111) internal successors, (8147), 18 states have internal predecessors, (8147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:31,998 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:31,998 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:32,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:32,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-07-21 08:51:32,215 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:32,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:32,216 INFO L85 PathProgramCache]: Analyzing trace with hash 579530123, now seen corresponding path program 1 times [2022-07-21 08:51:32,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:32,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069589984] [2022-07-21 08:51:32,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:32,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:32,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:32,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069589984] [2022-07-21 08:51:32,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069589984] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:32,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845237831] [2022-07-21 08:51:32,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:32,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:32,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:32,349 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:32,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-21 08:51:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:32,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:51:32,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:32,706 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:32,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:32,922 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:32,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845237831] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:32,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:32,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:51:32,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12433712] [2022-07-21 08:51:32,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:32,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:51:32,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:32,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:51:32,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:51:32,929 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 450 out of 568 [2022-07-21 08:51:32,933 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 481 transitions, 1181 flow. Second operand has 34 states, 34 states have (on average 452.79411764705884) internal successors, (15395), 34 states have internal predecessors, (15395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:32,933 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:32,933 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 450 of 568 [2022-07-21 08:51:32,933 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:33,442 INFO L129 PetriNetUnfolder]: 0/591 cut-off events. [2022-07-21 08:51:33,442 INFO L130 PetriNetUnfolder]: For 276/276 co-relation queries the response was YES. [2022-07-21 08:51:33,442 INFO L84 FinitePrefix]: Finished finitePrefix Result has 936 conditions, 591 events. 0/591 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1423 event pairs, 0 based on Foata normal form. 8/599 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-07-21 08:51:33,443 INFO L132 encePairwiseOnDemand]: 562/568 looper letters, 49 selfloop transitions, 45 changer transitions 0/532 dead transitions. [2022-07-21 08:51:33,444 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 532 transitions, 1685 flow [2022-07-21 08:51:33,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 08:51:33,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-21 08:51:33,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 20352 transitions. [2022-07-21 08:51:33,454 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7962441314553991 [2022-07-21 08:51:33,454 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 20352 transitions. [2022-07-21 08:51:33,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 20352 transitions. [2022-07-21 08:51:33,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:33,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 20352 transitions. [2022-07-21 08:51:33,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 452.26666666666665) internal successors, (20352), 45 states have internal predecessors, (20352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:33,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 568.0) internal successors, (26128), 46 states have internal predecessors, (26128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:33,483 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 568.0) internal successors, (26128), 46 states have internal predecessors, (26128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:33,483 INFO L186 Difference]: Start difference. First operand has 529 places, 481 transitions, 1181 flow. Second operand 45 states and 20352 transitions. [2022-07-21 08:51:33,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 532 transitions, 1685 flow [2022-07-21 08:51:33,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 532 transitions, 1645 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-21 08:51:33,490 INFO L242 Difference]: Finished difference. Result has 576 places, 506 transitions, 1459 flow [2022-07-21 08:51:33,491 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=1157, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1459, PETRI_PLACES=576, PETRI_TRANSITIONS=506} [2022-07-21 08:51:33,491 INFO L279 CegarLoopForPetriNet]: 505 programPoint places, 71 predicate places. [2022-07-21 08:51:33,491 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 506 transitions, 1459 flow [2022-07-21 08:51:33,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 452.79411764705884) internal successors, (15395), 34 states have internal predecessors, (15395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:33,492 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:33,493 INFO L200 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:33,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:33,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:33,698 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:33,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:33,698 INFO L85 PathProgramCache]: Analyzing trace with hash -813914885, now seen corresponding path program 1 times [2022-07-21 08:51:33,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:33,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858447304] [2022-07-21 08:51:33,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:33,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:33,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:33,740 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:33,806 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:33,813 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:33,814 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:33,814 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:33,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-07-21 08:51:33,814 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-21 08:51:33,815 WARN L231 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:33,815 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2022-07-21 08:51:33,858 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:51:33,861 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 534 places, 601 transitions, 1522 flow [2022-07-21 08:51:34,129 INFO L129 PetriNetUnfolder]: 164/1220 cut-off events. [2022-07-21 08:51:34,129 INFO L130 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2022-07-21 08:51:34,166 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1405 conditions, 1220 events. 164/1220 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4564 event pairs, 0 based on Foata normal form. 0/1022 useless extension candidates. Maximal degree in co-relation 1286. Up to 34 conditions per place. [2022-07-21 08:51:34,166 INFO L82 GeneralOperation]: Start removeDead. Operand has 534 places, 601 transitions, 1522 flow [2022-07-21 08:51:34,183 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 534 places, 601 transitions, 1522 flow [2022-07-21 08:51:34,184 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:34,184 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:51:34,184 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:34,188 INFO L129 PetriNetUnfolder]: 4/92 cut-off events. [2022-07-21 08:51:34,189 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:34,189 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:34,189 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] [2022-07-21 08:51:34,189 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:34,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:34,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1014791238, now seen corresponding path program 1 times [2022-07-21 08:51:34,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:34,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557039378] [2022-07-21 08:51:34,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:34,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:34,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:34,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:34,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557039378] [2022-07-21 08:51:34,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557039378] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:34,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:34,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:51:34,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530583746] [2022-07-21 08:51:34,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:34,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:51:34,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:34,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:51:34,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:51:34,203 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 484 out of 601 [2022-07-21 08:51:34,203 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 601 transitions, 1522 flow. Second operand has 2 states, 2 states have (on average 484.5) internal successors, (969), 2 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:34,203 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:34,204 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 484 of 601 [2022-07-21 08:51:34,204 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:34,472 INFO L129 PetriNetUnfolder]: 0/1039 cut-off events. [2022-07-21 08:51:34,472 INFO L130 PetriNetUnfolder]: For 936/936 co-relation queries the response was YES. [2022-07-21 08:51:34,473 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1241 conditions, 1039 events. 0/1039 cut-off events. For 936/936 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4284 event pairs, 0 based on Foata normal form. 796/1801 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-07-21 08:51:34,474 INFO L132 encePairwiseOnDemand]: 501/601 looper letters, 16 selfloop transitions, 0 changer transitions 12/500 dead transitions. [2022-07-21 08:51:34,474 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 500 transitions, 1352 flow [2022-07-21 08:51:34,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:51:34,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:51:34,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1084 transitions. [2022-07-21 08:51:34,476 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9018302828618968 [2022-07-21 08:51:34,476 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1084 transitions. [2022-07-21 08:51:34,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1084 transitions. [2022-07-21 08:51:34,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:34,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1084 transitions. [2022-07-21 08:51:34,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 542.0) internal successors, (1084), 2 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:34,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 601.0) internal successors, (1803), 3 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:34,478 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 601.0) internal successors, (1803), 3 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:34,478 INFO L186 Difference]: Start difference. First operand has 534 places, 601 transitions, 1522 flow. Second operand 2 states and 1084 transitions. [2022-07-21 08:51:34,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 500 transitions, 1352 flow [2022-07-21 08:51:34,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 500 transitions, 1112 flow, removed 120 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:34,484 INFO L242 Difference]: Finished difference. Result has 534 places, 488 transitions, 1056 flow [2022-07-21 08:51:34,484 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1056, PETRI_PLACES=534, PETRI_TRANSITIONS=488} [2022-07-21 08:51:34,486 INFO L279 CegarLoopForPetriNet]: 534 programPoint places, 0 predicate places. [2022-07-21 08:51:34,486 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 488 transitions, 1056 flow [2022-07-21 08:51:34,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 484.5) internal successors, (969), 2 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:34,486 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:34,486 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] [2022-07-21 08:51:34,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-07-21 08:51:34,487 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:34,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:34,487 INFO L85 PathProgramCache]: Analyzing trace with hash 721388231, now seen corresponding path program 1 times [2022-07-21 08:51:34,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:34,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341396665] [2022-07-21 08:51:34,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:34,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:34,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:34,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341396665] [2022-07-21 08:51:34,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341396665] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:34,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:34,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:34,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901334269] [2022-07-21 08:51:34,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:34,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:34,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:34,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:34,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:34,502 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 477 out of 601 [2022-07-21 08:51:34,503 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 488 transitions, 1056 flow. Second operand has 3 states, 3 states have (on average 478.0) internal successors, (1434), 3 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:34,503 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:34,503 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 477 of 601 [2022-07-21 08:51:34,503 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:34,706 INFO L129 PetriNetUnfolder]: 0/822 cut-off events. [2022-07-21 08:51:34,706 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-07-21 08:51:34,707 INFO L84 FinitePrefix]: Finished finitePrefix Result has 989 conditions, 822 events. 0/822 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2782 event pairs, 0 based on Foata normal form. 0/806 useless extension candidates. Maximal degree in co-relation 0. Up to 96 conditions per place. [2022-07-21 08:51:34,708 INFO L132 encePairwiseOnDemand]: 598/601 looper letters, 25 selfloop transitions, 2 changer transitions 0/492 dead transitions. [2022-07-21 08:51:34,708 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 492 transitions, 1118 flow [2022-07-21 08:51:34,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:34,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:34,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1459 transitions. [2022-07-21 08:51:34,710 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8092068774265113 [2022-07-21 08:51:34,710 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1459 transitions. [2022-07-21 08:51:34,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1459 transitions. [2022-07-21 08:51:34,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:34,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1459 transitions. [2022-07-21 08:51:34,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 486.3333333333333) internal successors, (1459), 3 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:34,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:34,712 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:34,712 INFO L186 Difference]: Start difference. First operand has 534 places, 488 transitions, 1056 flow. Second operand 3 states and 1459 transitions. [2022-07-21 08:51:34,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 492 transitions, 1118 flow [2022-07-21 08:51:34,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 492 transitions, 1118 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:34,718 INFO L242 Difference]: Finished difference. Result has 525 places, 489 transitions, 1068 flow [2022-07-21 08:51:34,718 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1068, PETRI_PLACES=525, PETRI_TRANSITIONS=489} [2022-07-21 08:51:34,718 INFO L279 CegarLoopForPetriNet]: 534 programPoint places, -9 predicate places. [2022-07-21 08:51:34,719 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 489 transitions, 1068 flow [2022-07-21 08:51:34,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 478.0) internal successors, (1434), 3 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:34,719 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:34,719 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:34,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-07-21 08:51:34,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:34,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:34,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1266935680, now seen corresponding path program 1 times [2022-07-21 08:51:34,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:34,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358344857] [2022-07-21 08:51:34,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:34,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:34,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:34,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358344857] [2022-07-21 08:51:34,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358344857] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:34,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687758578] [2022-07-21 08:51:34,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:34,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:34,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:34,756 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:34,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-21 08:51:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:35,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:35,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:35,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:35,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687758578] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:35,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:35,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:35,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022705881] [2022-07-21 08:51:35,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:35,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:35,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:35,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:35,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:35,072 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 601 [2022-07-21 08:51:35,074 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 489 transitions, 1068 flow. Second operand has 10 states, 10 states have (on average 478.3) internal successors, (4783), 10 states have internal predecessors, (4783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:35,074 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:35,074 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 601 [2022-07-21 08:51:35,074 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:35,323 INFO L129 PetriNetUnfolder]: 0/796 cut-off events. [2022-07-21 08:51:35,323 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-07-21 08:51:35,324 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1011 conditions, 796 events. 0/796 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2638 event pairs, 0 based on Foata normal form. 2/798 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2022-07-21 08:51:35,325 INFO L132 encePairwiseOnDemand]: 595/601 looper letters, 26 selfloop transitions, 9 changer transitions 0/499 dead transitions. [2022-07-21 08:51:35,325 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 499 transitions, 1160 flow [2022-07-21 08:51:35,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:35,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:35,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4321 transitions. [2022-07-21 08:51:35,328 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.798853762248105 [2022-07-21 08:51:35,328 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4321 transitions. [2022-07-21 08:51:35,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4321 transitions. [2022-07-21 08:51:35,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:35,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4321 transitions. [2022-07-21 08:51:35,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 480.1111111111111) internal successors, (4321), 9 states have internal predecessors, (4321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:35,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 601.0) internal successors, (6010), 10 states have internal predecessors, (6010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:35,333 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 601.0) internal successors, (6010), 10 states have internal predecessors, (6010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:35,334 INFO L186 Difference]: Start difference. First operand has 525 places, 489 transitions, 1068 flow. Second operand 9 states and 4321 transitions. [2022-07-21 08:51:35,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 499 transitions, 1160 flow [2022-07-21 08:51:35,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 499 transitions, 1158 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:35,339 INFO L242 Difference]: Finished difference. Result has 535 places, 495 transitions, 1116 flow [2022-07-21 08:51:35,340 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1116, PETRI_PLACES=535, PETRI_TRANSITIONS=495} [2022-07-21 08:51:35,340 INFO L279 CegarLoopForPetriNet]: 534 programPoint places, 1 predicate places. [2022-07-21 08:51:35,340 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 495 transitions, 1116 flow [2022-07-21 08:51:35,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 478.3) internal successors, (4783), 10 states have internal predecessors, (4783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:35,341 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:35,341 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] [2022-07-21 08:51:35,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:35,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-07-21 08:51:35,551 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:35,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:35,552 INFO L85 PathProgramCache]: Analyzing trace with hash 567657013, now seen corresponding path program 1 times [2022-07-21 08:51:35,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:35,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469216837] [2022-07-21 08:51:35,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:35,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:35,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:35,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469216837] [2022-07-21 08:51:35,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469216837] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:35,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311400509] [2022-07-21 08:51:35,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:35,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:35,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:35,595 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:35,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-21 08:51:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:35,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:51:35,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:35,886 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:35,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:35,962 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:35,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311400509] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:35,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:35,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:51:35,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413338591] [2022-07-21 08:51:35,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:35,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:51:35,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:35,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:51:35,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:51:35,967 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 601 [2022-07-21 08:51:35,969 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 495 transitions, 1116 flow. Second operand has 18 states, 18 states have (on average 478.6111111111111) internal successors, (8615), 18 states have internal predecessors, (8615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:35,969 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:35,970 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 601 [2022-07-21 08:51:35,970 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:36,331 INFO L129 PetriNetUnfolder]: 0/744 cut-off events. [2022-07-21 08:51:36,332 INFO L130 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2022-07-21 08:51:36,332 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1068 conditions, 744 events. 0/744 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2286 event pairs, 0 based on Foata normal form. 4/748 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-07-21 08:51:36,333 INFO L132 encePairwiseOnDemand]: 595/601 looper letters, 34 selfloop transitions, 21 changer transitions 0/519 dead transitions. [2022-07-21 08:51:36,333 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 519 transitions, 1334 flow [2022-07-21 08:51:36,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:51:36,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:51:36,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 10055 transitions. [2022-07-21 08:51:36,338 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7966880595832343 [2022-07-21 08:51:36,338 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 10055 transitions. [2022-07-21 08:51:36,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 10055 transitions. [2022-07-21 08:51:36,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:36,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 10055 transitions. [2022-07-21 08:51:36,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 478.8095238095238) internal successors, (10055), 21 states have internal predecessors, (10055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:36,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 601.0) internal successors, (13222), 22 states have internal predecessors, (13222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:36,352 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 601.0) internal successors, (13222), 22 states have internal predecessors, (13222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:36,352 INFO L186 Difference]: Start difference. First operand has 535 places, 495 transitions, 1116 flow. Second operand 21 states and 10055 transitions. [2022-07-21 08:51:36,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 519 transitions, 1334 flow [2022-07-21 08:51:36,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 519 transitions, 1320 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:36,359 INFO L242 Difference]: Finished difference. Result has 559 places, 508 transitions, 1240 flow [2022-07-21 08:51:36,362 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1240, PETRI_PLACES=559, PETRI_TRANSITIONS=508} [2022-07-21 08:51:36,362 INFO L279 CegarLoopForPetriNet]: 534 programPoint places, 25 predicate places. [2022-07-21 08:51:36,362 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 508 transitions, 1240 flow [2022-07-21 08:51:36,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 478.6111111111111) internal successors, (8615), 18 states have internal predecessors, (8615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:36,363 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:36,363 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:36,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:36,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:36,580 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:36,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:36,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1105185707, now seen corresponding path program 1 times [2022-07-21 08:51:36,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:36,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129258847] [2022-07-21 08:51:36,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:36,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:36,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:36,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129258847] [2022-07-21 08:51:36,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129258847] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:36,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884298909] [2022-07-21 08:51:36,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:36,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:36,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:36,694 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:36,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-21 08:51:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:36,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:51:36,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:37,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:37,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884298909] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:37,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:37,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:51:37,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573768372] [2022-07-21 08:51:37,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:37,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:51:37,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:37,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:51:37,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:51:37,311 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 601 [2022-07-21 08:51:37,316 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 508 transitions, 1240 flow. Second operand has 34 states, 34 states have (on average 478.79411764705884) internal successors, (16279), 34 states have internal predecessors, (16279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:37,316 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:37,317 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 601 [2022-07-21 08:51:37,317 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:37,859 INFO L129 PetriNetUnfolder]: 0/640 cut-off events. [2022-07-21 08:51:37,860 INFO L130 PetriNetUnfolder]: For 303/303 co-relation queries the response was YES. [2022-07-21 08:51:37,860 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 640 events. 0/640 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1606 event pairs, 0 based on Foata normal form. 8/648 useless extension candidates. Maximal degree in co-relation 0. Up to 29 conditions per place. [2022-07-21 08:51:37,861 INFO L132 encePairwiseOnDemand]: 595/601 looper letters, 50 selfloop transitions, 45 changer transitions 0/559 dead transitions. [2022-07-21 08:51:37,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 559 transitions, 1746 flow [2022-07-21 08:51:37,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 08:51:37,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-21 08:51:37,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 21523 transitions. [2022-07-21 08:51:37,870 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.795821778517286 [2022-07-21 08:51:37,871 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 21523 transitions. [2022-07-21 08:51:37,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 21523 transitions. [2022-07-21 08:51:37,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:37,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 21523 transitions. [2022-07-21 08:51:37,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 478.2888888888889) internal successors, (21523), 45 states have internal predecessors, (21523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:37,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 601.0) internal successors, (27646), 46 states have internal predecessors, (27646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:37,900 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 601.0) internal successors, (27646), 46 states have internal predecessors, (27646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:37,901 INFO L186 Difference]: Start difference. First operand has 559 places, 508 transitions, 1240 flow. Second operand 45 states and 21523 transitions. [2022-07-21 08:51:37,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 559 transitions, 1746 flow [2022-07-21 08:51:37,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 597 places, 559 transitions, 1706 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-21 08:51:37,910 INFO L242 Difference]: Finished difference. Result has 606 places, 533 transitions, 1518 flow [2022-07-21 08:51:37,910 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1518, PETRI_PLACES=606, PETRI_TRANSITIONS=533} [2022-07-21 08:51:37,910 INFO L279 CegarLoopForPetriNet]: 534 programPoint places, 72 predicate places. [2022-07-21 08:51:37,910 INFO L495 AbstractCegarLoop]: Abstraction has has 606 places, 533 transitions, 1518 flow [2022-07-21 08:51:37,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 478.79411764705884) internal successors, (16279), 34 states have internal predecessors, (16279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:37,912 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:37,919 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:37,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:38,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-07-21 08:51:38,136 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:38,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:38,136 INFO L85 PathProgramCache]: Analyzing trace with hash -2142953785, now seen corresponding path program 1 times [2022-07-21 08:51:38,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:38,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621970592] [2022-07-21 08:51:38,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:38,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:38,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:38,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621970592] [2022-07-21 08:51:38,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621970592] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:38,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183208948] [2022-07-21 08:51:38,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:38,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:38,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:38,469 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:38,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-21 08:51:38,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:38,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 08:51:38,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:38,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:39,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:39,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183208948] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:39,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:39,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-21 08:51:39,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589528505] [2022-07-21 08:51:39,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:39,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-21 08:51:39,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:39,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-21 08:51:39,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-21 08:51:39,604 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 601 [2022-07-21 08:51:39,613 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 533 transitions, 1518 flow. Second operand has 66 states, 66 states have (on average 478.8939393939394) internal successors, (31607), 66 states have internal predecessors, (31607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:39,614 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:39,614 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 601 [2022-07-21 08:51:39,614 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:40,320 INFO L129 PetriNetUnfolder]: 0/614 cut-off events. [2022-07-21 08:51:40,320 INFO L130 PetriNetUnfolder]: For 409/409 co-relation queries the response was YES. [2022-07-21 08:51:40,320 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1033 conditions, 614 events. 0/614 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1463 event pairs, 0 based on Foata normal form. 2/616 useless extension candidates. Maximal degree in co-relation 0. Up to 28 conditions per place. [2022-07-21 08:51:40,321 INFO L132 encePairwiseOnDemand]: 596/601 looper letters, 51 selfloop transitions, 49 changer transitions 0/552 dead transitions. [2022-07-21 08:51:40,321 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 552 transitions, 1852 flow [2022-07-21 08:51:40,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-21 08:51:40,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-07-21 08:51:40,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 24378 transitions. [2022-07-21 08:51:40,332 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7953410981697171 [2022-07-21 08:51:40,332 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 24378 transitions. [2022-07-21 08:51:40,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 24378 transitions. [2022-07-21 08:51:40,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:40,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 24378 transitions. [2022-07-21 08:51:40,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 478.0) internal successors, (24378), 51 states have internal predecessors, (24378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:40,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 601.0) internal successors, (31252), 52 states have internal predecessors, (31252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:40,372 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 601.0) internal successors, (31252), 52 states have internal predecessors, (31252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:40,373 INFO L186 Difference]: Start difference. First operand has 606 places, 533 transitions, 1518 flow. Second operand 51 states and 24378 transitions. [2022-07-21 08:51:40,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 552 transitions, 1852 flow [2022-07-21 08:51:40,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 552 transitions, 1715 flow, removed 11 selfloop flow, removed 33 redundant places. [2022-07-21 08:51:40,381 INFO L242 Difference]: Finished difference. Result has 610 places, 523 transitions, 1471 flow [2022-07-21 08:51:40,381 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1471, PETRI_PLACES=610, PETRI_TRANSITIONS=523} [2022-07-21 08:51:40,381 INFO L279 CegarLoopForPetriNet]: 534 programPoint places, 76 predicate places. [2022-07-21 08:51:40,382 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 523 transitions, 1471 flow [2022-07-21 08:51:40,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 478.8939393939394) internal successors, (31607), 66 states have internal predecessors, (31607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:40,385 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:40,385 INFO L200 CegarLoopForPetriNet]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:40,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:40,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-07-21 08:51:40,604 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:40,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:40,604 INFO L85 PathProgramCache]: Analyzing trace with hash -823919421, now seen corresponding path program 1 times [2022-07-21 08:51:40,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:40,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701417925] [2022-07-21 08:51:40,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:40,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:40,649 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:40,687 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:40,688 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:40,688 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:40,688 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:40,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-07-21 08:51:40,688 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:40,689 WARN L231 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:40,689 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2022-07-21 08:51:40,720 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:51:40,722 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 563 places, 634 transitions, 1625 flow [2022-07-21 08:51:40,985 INFO L129 PetriNetUnfolder]: 174/1292 cut-off events. [2022-07-21 08:51:40,986 INFO L130 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2022-07-21 08:51:41,042 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1497 conditions, 1292 events. 174/1292 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4858 event pairs, 0 based on Foata normal form. 0/1082 useless extension candidates. Maximal degree in co-relation 1377. Up to 36 conditions per place. [2022-07-21 08:51:41,043 INFO L82 GeneralOperation]: Start removeDead. Operand has 563 places, 634 transitions, 1625 flow [2022-07-21 08:51:41,064 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 563 places, 634 transitions, 1625 flow [2022-07-21 08:51:41,065 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:41,065 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:51:41,065 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:41,068 INFO L129 PetriNetUnfolder]: 4/88 cut-off events. [2022-07-21 08:51:41,069 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:41,069 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:41,069 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] [2022-07-21 08:51:41,069 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:41,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:41,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1714884999, now seen corresponding path program 1 times [2022-07-21 08:51:41,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:41,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645753974] [2022-07-21 08:51:41,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:41,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:41,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:41,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:41,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645753974] [2022-07-21 08:51:41,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645753974] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:41,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:41,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:41,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758993670] [2022-07-21 08:51:41,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:41,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:41,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:41,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:41,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:41,086 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 503 out of 634 [2022-07-21 08:51:41,087 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 634 transitions, 1625 flow. Second operand has 3 states, 3 states have (on average 504.0) internal successors, (1512), 3 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:41,087 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:41,087 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 503 of 634 [2022-07-21 08:51:41,087 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:41,385 INFO L129 PetriNetUnfolder]: 0/1075 cut-off events. [2022-07-21 08:51:41,385 INFO L130 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2022-07-21 08:51:41,386 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1387 conditions, 1075 events. 0/1075 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4417 event pairs, 0 based on Foata normal form. 4903/5944 useless extension candidates. Maximal degree in co-relation 0. Up to 102 conditions per place. [2022-07-21 08:51:41,387 INFO L132 encePairwiseOnDemand]: 525/634 looper letters, 26 selfloop transitions, 2 changer transitions 12/531 dead transitions. [2022-07-21 08:51:41,387 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 531 transitions, 1475 flow [2022-07-21 08:51:41,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:41,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:41,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1651 transitions. [2022-07-21 08:51:41,388 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8680336487907466 [2022-07-21 08:51:41,389 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1651 transitions. [2022-07-21 08:51:41,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1651 transitions. [2022-07-21 08:51:41,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:41,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1651 transitions. [2022-07-21 08:51:41,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 550.3333333333334) internal successors, (1651), 3 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:41,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 634.0) internal successors, (2536), 4 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:41,391 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 634.0) internal successors, (2536), 4 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:41,391 INFO L186 Difference]: Start difference. First operand has 563 places, 634 transitions, 1625 flow. Second operand 3 states and 1651 transitions. [2022-07-21 08:51:41,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 531 transitions, 1475 flow [2022-07-21 08:51:41,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 531 transitions, 1203 flow, removed 136 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:41,398 INFO L242 Difference]: Finished difference. Result has 565 places, 516 transitions, 1127 flow [2022-07-21 08:51:41,399 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1127, PETRI_PLACES=565, PETRI_TRANSITIONS=516} [2022-07-21 08:51:41,399 INFO L279 CegarLoopForPetriNet]: 563 programPoint places, 2 predicate places. [2022-07-21 08:51:41,399 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 516 transitions, 1127 flow [2022-07-21 08:51:41,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 504.0) internal successors, (1512), 3 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:41,400 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:41,400 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:41,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-07-21 08:51:41,400 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:41,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:41,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1508779104, now seen corresponding path program 1 times [2022-07-21 08:51:41,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:41,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041143352] [2022-07-21 08:51:41,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:41,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:41,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:41,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:41,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041143352] [2022-07-21 08:51:41,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041143352] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:41,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911177680] [2022-07-21 08:51:41,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:41,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:41,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:41,423 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:41,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-21 08:51:41,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:41,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:41,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:41,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:41,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:41,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911177680] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:41,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:41,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:41,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623100845] [2022-07-21 08:51:41,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:41,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:41,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:41,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:41,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:41,730 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 502 out of 634 [2022-07-21 08:51:41,731 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 516 transitions, 1127 flow. Second operand has 10 states, 10 states have (on average 504.3) internal successors, (5043), 10 states have internal predecessors, (5043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:41,731 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:41,731 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 502 of 634 [2022-07-21 08:51:41,731 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:42,013 INFO L129 PetriNetUnfolder]: 0/845 cut-off events. [2022-07-21 08:51:42,014 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-21 08:51:42,014 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1072 conditions, 845 events. 0/845 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2812 event pairs, 0 based on Foata normal form. 2/847 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2022-07-21 08:51:42,016 INFO L132 encePairwiseOnDemand]: 628/634 looper letters, 27 selfloop transitions, 9 changer transitions 0/526 dead transitions. [2022-07-21 08:51:42,016 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 526 transitions, 1221 flow [2022-07-21 08:51:42,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:42,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:42,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4556 transitions. [2022-07-21 08:51:42,018 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7984577637574483 [2022-07-21 08:51:42,018 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4556 transitions. [2022-07-21 08:51:42,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4556 transitions. [2022-07-21 08:51:42,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:42,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4556 transitions. [2022-07-21 08:51:42,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 506.22222222222223) internal successors, (4556), 9 states have internal predecessors, (4556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:42,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 634.0) internal successors, (6340), 10 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:42,025 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 634.0) internal successors, (6340), 10 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:42,025 INFO L186 Difference]: Start difference. First operand has 565 places, 516 transitions, 1127 flow. Second operand 9 states and 4556 transitions. [2022-07-21 08:51:42,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 526 transitions, 1221 flow [2022-07-21 08:51:42,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 526 transitions, 1219 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:42,031 INFO L242 Difference]: Finished difference. Result has 563 places, 522 transitions, 1175 flow [2022-07-21 08:51:42,031 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1125, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1175, PETRI_PLACES=563, PETRI_TRANSITIONS=522} [2022-07-21 08:51:42,031 INFO L279 CegarLoopForPetriNet]: 563 programPoint places, 0 predicate places. [2022-07-21 08:51:42,032 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 522 transitions, 1175 flow [2022-07-21 08:51:42,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 504.3) internal successors, (5043), 10 states have internal predecessors, (5043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:42,032 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:42,032 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] [2022-07-21 08:51:42,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:42,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:42,251 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:42,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:42,251 INFO L85 PathProgramCache]: Analyzing trace with hash -587987435, now seen corresponding path program 1 times [2022-07-21 08:51:42,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:42,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067986149] [2022-07-21 08:51:42,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:42,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:42,291 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:42,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:42,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067986149] [2022-07-21 08:51:42,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067986149] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:42,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142918197] [2022-07-21 08:51:42,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:42,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:42,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:42,294 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:42,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-21 08:51:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:42,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:51:42,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:42,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:42,703 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:42,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142918197] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:42,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:42,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:51:42,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354242675] [2022-07-21 08:51:42,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:42,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:51:42,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:42,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:51:42,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:51:42,707 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 502 out of 634 [2022-07-21 08:51:42,710 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 522 transitions, 1175 flow. Second operand has 18 states, 18 states have (on average 504.6111111111111) internal successors, (9083), 18 states have internal predecessors, (9083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:42,710 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:42,710 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 502 of 634 [2022-07-21 08:51:42,710 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:43,088 INFO L129 PetriNetUnfolder]: 0/793 cut-off events. [2022-07-21 08:51:43,088 INFO L130 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2022-07-21 08:51:43,088 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1137 conditions, 793 events. 0/793 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2472 event pairs, 0 based on Foata normal form. 4/797 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2022-07-21 08:51:43,090 INFO L132 encePairwiseOnDemand]: 628/634 looper letters, 35 selfloop transitions, 21 changer transitions 0/546 dead transitions. [2022-07-21 08:51:43,090 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 546 transitions, 1395 flow [2022-07-21 08:51:43,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:51:43,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:51:43,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 10602 transitions. [2022-07-21 08:51:43,095 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7963046417305092 [2022-07-21 08:51:43,095 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 10602 transitions. [2022-07-21 08:51:43,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 10602 transitions. [2022-07-21 08:51:43,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:43,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 10602 transitions. [2022-07-21 08:51:43,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 504.85714285714283) internal successors, (10602), 21 states have internal predecessors, (10602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:43,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 634.0) internal successors, (13948), 22 states have internal predecessors, (13948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:43,110 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 634.0) internal successors, (13948), 22 states have internal predecessors, (13948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:43,110 INFO L186 Difference]: Start difference. First operand has 563 places, 522 transitions, 1175 flow. Second operand 21 states and 10602 transitions. [2022-07-21 08:51:43,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 546 transitions, 1395 flow [2022-07-21 08:51:43,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 546 transitions, 1381 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:43,117 INFO L242 Difference]: Finished difference. Result has 587 places, 535 transitions, 1299 flow [2022-07-21 08:51:43,117 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1299, PETRI_PLACES=587, PETRI_TRANSITIONS=535} [2022-07-21 08:51:43,117 INFO L279 CegarLoopForPetriNet]: 563 programPoint places, 24 predicate places. [2022-07-21 08:51:43,117 INFO L495 AbstractCegarLoop]: Abstraction has has 587 places, 535 transitions, 1299 flow [2022-07-21 08:51:43,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 504.6111111111111) internal successors, (9083), 18 states have internal predecessors, (9083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:43,118 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:43,119 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:43,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-07-21 08:51:43,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-07-21 08:51:43,332 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:43,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:43,332 INFO L85 PathProgramCache]: Analyzing trace with hash -819498741, now seen corresponding path program 1 times [2022-07-21 08:51:43,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:43,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766050083] [2022-07-21 08:51:43,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:43,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:43,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:43,464 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:43,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:43,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766050083] [2022-07-21 08:51:43,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766050083] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:43,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401421100] [2022-07-21 08:51:43,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:43,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:43,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:43,466 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:43,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-21 08:51:43,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:43,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:51:43,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:43,853 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:43,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:44,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401421100] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:44,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:44,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:51:44,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457543030] [2022-07-21 08:51:44,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:44,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:51:44,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:44,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:51:44,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:51:44,156 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 502 out of 634 [2022-07-21 08:51:44,160 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 535 transitions, 1299 flow. Second operand has 34 states, 34 states have (on average 504.79411764705884) internal successors, (17163), 34 states have internal predecessors, (17163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:44,165 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:44,165 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 502 of 634 [2022-07-21 08:51:44,166 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:44,749 INFO L129 PetriNetUnfolder]: 0/689 cut-off events. [2022-07-21 08:51:44,749 INFO L130 PetriNetUnfolder]: For 330/330 co-relation queries the response was YES. [2022-07-21 08:51:44,749 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1094 conditions, 689 events. 0/689 cut-off events. For 330/330 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1791 event pairs, 0 based on Foata normal form. 8/697 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-07-21 08:51:44,751 INFO L132 encePairwiseOnDemand]: 628/634 looper letters, 51 selfloop transitions, 45 changer transitions 0/586 dead transitions. [2022-07-21 08:51:44,751 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 631 places, 586 transitions, 1807 flow [2022-07-21 08:51:44,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 08:51:44,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-21 08:51:44,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 22694 transitions. [2022-07-21 08:51:44,760 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7954433929197336 [2022-07-21 08:51:44,760 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 22694 transitions. [2022-07-21 08:51:44,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 22694 transitions. [2022-07-21 08:51:44,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:44,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 22694 transitions. [2022-07-21 08:51:44,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 504.31111111111113) internal successors, (22694), 45 states have internal predecessors, (22694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:44,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 634.0) internal successors, (29164), 46 states have internal predecessors, (29164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:44,847 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 634.0) internal successors, (29164), 46 states have internal predecessors, (29164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:44,848 INFO L186 Difference]: Start difference. First operand has 587 places, 535 transitions, 1299 flow. Second operand 45 states and 22694 transitions. [2022-07-21 08:51:44,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 631 places, 586 transitions, 1807 flow [2022-07-21 08:51:44,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 586 transitions, 1767 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-21 08:51:44,855 INFO L242 Difference]: Finished difference. Result has 634 places, 560 transitions, 1577 flow [2022-07-21 08:51:44,855 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1275, PETRI_DIFFERENCE_MINUEND_PLACES=581, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1577, PETRI_PLACES=634, PETRI_TRANSITIONS=560} [2022-07-21 08:51:44,856 INFO L279 CegarLoopForPetriNet]: 563 programPoint places, 71 predicate places. [2022-07-21 08:51:44,856 INFO L495 AbstractCegarLoop]: Abstraction has has 634 places, 560 transitions, 1577 flow [2022-07-21 08:51:44,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 504.79411764705884) internal successors, (17163), 34 states have internal predecessors, (17163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:44,858 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:44,858 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:44,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:45,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:45,067 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:45,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:45,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1853815001, now seen corresponding path program 1 times [2022-07-21 08:51:45,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:45,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210436815] [2022-07-21 08:51:45,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:45,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:45,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:45,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:45,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210436815] [2022-07-21 08:51:45,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210436815] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:45,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934586] [2022-07-21 08:51:45,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:45,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:45,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:45,452 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:45,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-21 08:51:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:45,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 08:51:45,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:45,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:45,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:46,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934586] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:46,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:46,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-21 08:51:46,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906968006] [2022-07-21 08:51:46,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:46,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-21 08:51:46,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:46,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-21 08:51:46,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-21 08:51:46,696 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 502 out of 634 [2022-07-21 08:51:46,705 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 634 places, 560 transitions, 1577 flow. Second operand has 66 states, 66 states have (on average 504.8939393939394) internal successors, (33323), 66 states have internal predecessors, (33323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:46,706 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:46,706 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 502 of 634 [2022-07-21 08:51:46,706 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:47,482 INFO L129 PetriNetUnfolder]: 0/650 cut-off events. [2022-07-21 08:51:47,482 INFO L130 PetriNetUnfolder]: For 530/530 co-relation queries the response was YES. [2022-07-21 08:51:47,482 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1095 conditions, 650 events. 0/650 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1561 event pairs, 0 based on Foata normal form. 3/653 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-07-21 08:51:47,483 INFO L132 encePairwiseOnDemand]: 629/634 looper letters, 54 selfloop transitions, 52 changer transitions 0/584 dead transitions. [2022-07-21 08:51:47,484 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 674 places, 584 transitions, 1967 flow [2022-07-21 08:51:47,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-21 08:51:47,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-07-21 08:51:47,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 27217 transitions. [2022-07-21 08:51:47,494 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7949818904077579 [2022-07-21 08:51:47,495 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 27217 transitions. [2022-07-21 08:51:47,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 27217 transitions. [2022-07-21 08:51:47,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:47,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 27217 transitions. [2022-07-21 08:51:47,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 504.01851851851853) internal successors, (27217), 54 states have internal predecessors, (27217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:47,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 634.0) internal successors, (34870), 55 states have internal predecessors, (34870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:47,529 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 634.0) internal successors, (34870), 55 states have internal predecessors, (34870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:47,529 INFO L186 Difference]: Start difference. First operand has 634 places, 560 transitions, 1577 flow. Second operand 54 states and 27217 transitions. [2022-07-21 08:51:47,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 674 places, 584 transitions, 1967 flow [2022-07-21 08:51:47,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 641 places, 584 transitions, 1822 flow, removed 12 selfloop flow, removed 33 redundant places. [2022-07-21 08:51:47,537 INFO L242 Difference]: Finished difference. Result has 641 places, 553 transitions, 1559 flow [2022-07-21 08:51:47,538 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=1559, PETRI_PLACES=641, PETRI_TRANSITIONS=553} [2022-07-21 08:51:47,538 INFO L279 CegarLoopForPetriNet]: 563 programPoint places, 78 predicate places. [2022-07-21 08:51:47,538 INFO L495 AbstractCegarLoop]: Abstraction has has 641 places, 553 transitions, 1559 flow [2022-07-21 08:51:47,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 504.8939393939394) internal successors, (33323), 66 states have internal predecessors, (33323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:47,541 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:47,541 INFO L200 CegarLoopForPetriNet]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:47,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-07-21 08:51:47,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:47,757 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:47,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:47,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1613944372, now seen corresponding path program 1 times [2022-07-21 08:51:47,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:47,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704217338] [2022-07-21 08:51:47,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:47,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:47,811 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:47,846 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:47,846 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:47,846 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:47,846 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:47,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-07-21 08:51:47,846 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 08:51:47,847 WARN L231 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:47,847 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2022-07-21 08:51:47,876 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:51:47,879 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 592 places, 667 transitions, 1730 flow [2022-07-21 08:51:48,285 INFO L129 PetriNetUnfolder]: 184/1364 cut-off events. [2022-07-21 08:51:48,286 INFO L130 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2022-07-21 08:51:48,340 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1590 conditions, 1364 events. 184/1364 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5129 event pairs, 0 based on Foata normal form. 0/1142 useless extension candidates. Maximal degree in co-relation 1469. Up to 38 conditions per place. [2022-07-21 08:51:48,340 INFO L82 GeneralOperation]: Start removeDead. Operand has 592 places, 667 transitions, 1730 flow [2022-07-21 08:51:48,361 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 592 places, 667 transitions, 1730 flow [2022-07-21 08:51:48,362 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:48,363 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:51:48,363 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:48,368 INFO L129 PetriNetUnfolder]: 4/91 cut-off events. [2022-07-21 08:51:48,368 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:48,368 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:48,368 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] [2022-07-21 08:51:48,368 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:48,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:48,369 INFO L85 PathProgramCache]: Analyzing trace with hash 445354150, now seen corresponding path program 1 times [2022-07-21 08:51:48,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:48,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164309037] [2022-07-21 08:51:48,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:48,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:48,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:48,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:48,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164309037] [2022-07-21 08:51:48,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164309037] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:48,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:48,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:51:48,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603213068] [2022-07-21 08:51:48,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:48,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:51:48,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:48,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:51:48,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:51:48,383 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 536 out of 667 [2022-07-21 08:51:48,383 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 667 transitions, 1730 flow. Second operand has 2 states, 2 states have (on average 536.5) internal successors, (1073), 2 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:48,383 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:48,383 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 536 of 667 [2022-07-21 08:51:48,384 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:48,671 INFO L129 PetriNetUnfolder]: 0/1161 cut-off events. [2022-07-21 08:51:48,671 INFO L130 PetriNetUnfolder]: For 1293/1293 co-relation queries the response was YES. [2022-07-21 08:51:48,672 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1406 conditions, 1161 events. 0/1161 cut-off events. For 1293/1293 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4832 event pairs, 0 based on Foata normal form. 1002/2125 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-21 08:51:48,673 INFO L132 encePairwiseOnDemand]: 555/667 looper letters, 18 selfloop transitions, 0 changer transitions 12/554 dead transitions. [2022-07-21 08:51:48,673 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 592 places, 554 transitions, 1540 flow [2022-07-21 08:51:48,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:51:48,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:51:48,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1202 transitions. [2022-07-21 08:51:48,675 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9010494752623688 [2022-07-21 08:51:48,675 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1202 transitions. [2022-07-21 08:51:48,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1202 transitions. [2022-07-21 08:51:48,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:48,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1202 transitions. [2022-07-21 08:51:48,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 601.0) internal successors, (1202), 2 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:48,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 667.0) internal successors, (2001), 3 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:48,677 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 667.0) internal successors, (2001), 3 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:48,677 INFO L186 Difference]: Start difference. First operand has 592 places, 667 transitions, 1730 flow. Second operand 2 states and 1202 transitions. [2022-07-21 08:51:48,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 592 places, 554 transitions, 1540 flow [2022-07-21 08:51:48,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 554 transitions, 1234 flow, removed 153 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:48,684 INFO L242 Difference]: Finished difference. Result has 592 places, 542 transitions, 1174 flow [2022-07-21 08:51:48,684 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=591, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1174, PETRI_PLACES=592, PETRI_TRANSITIONS=542} [2022-07-21 08:51:48,685 INFO L279 CegarLoopForPetriNet]: 592 programPoint places, 0 predicate places. [2022-07-21 08:51:48,685 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 542 transitions, 1174 flow [2022-07-21 08:51:48,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 536.5) internal successors, (1073), 2 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:48,685 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:48,685 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] [2022-07-21 08:51:48,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-07-21 08:51:48,685 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:48,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:48,686 INFO L85 PathProgramCache]: Analyzing trace with hash 151951143, now seen corresponding path program 1 times [2022-07-21 08:51:48,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:48,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968476185] [2022-07-21 08:51:48,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:48,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:48,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:48,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:48,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968476185] [2022-07-21 08:51:48,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968476185] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:48,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:48,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:48,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983999846] [2022-07-21 08:51:48,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:48,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:48,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:48,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:48,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:48,701 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 529 out of 667 [2022-07-21 08:51:48,702 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 542 transitions, 1174 flow. Second operand has 3 states, 3 states have (on average 530.0) internal successors, (1590), 3 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:48,702 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:48,702 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 529 of 667 [2022-07-21 08:51:48,702 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:48,973 INFO L129 PetriNetUnfolder]: 0/920 cut-off events. [2022-07-21 08:51:48,973 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-21 08:51:48,973 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1107 conditions, 920 events. 0/920 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3161 event pairs, 0 based on Foata normal form. 0/902 useless extension candidates. Maximal degree in co-relation 0. Up to 108 conditions per place. [2022-07-21 08:51:48,974 INFO L132 encePairwiseOnDemand]: 664/667 looper letters, 27 selfloop transitions, 2 changer transitions 0/546 dead transitions. [2022-07-21 08:51:48,975 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 546 transitions, 1240 flow [2022-07-21 08:51:48,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:48,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:48,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1617 transitions. [2022-07-21 08:51:48,976 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.808095952023988 [2022-07-21 08:51:48,976 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1617 transitions. [2022-07-21 08:51:48,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1617 transitions. [2022-07-21 08:51:48,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:48,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1617 transitions. [2022-07-21 08:51:48,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 539.0) internal successors, (1617), 3 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:48,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:48,979 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:48,979 INFO L186 Difference]: Start difference. First operand has 592 places, 542 transitions, 1174 flow. Second operand 3 states and 1617 transitions. [2022-07-21 08:51:48,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 546 transitions, 1240 flow [2022-07-21 08:51:48,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 546 transitions, 1240 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:48,984 INFO L242 Difference]: Finished difference. Result has 583 places, 543 transitions, 1186 flow [2022-07-21 08:51:48,985 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=580, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1186, PETRI_PLACES=583, PETRI_TRANSITIONS=543} [2022-07-21 08:51:48,985 INFO L279 CegarLoopForPetriNet]: 592 programPoint places, -9 predicate places. [2022-07-21 08:51:48,985 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 543 transitions, 1186 flow [2022-07-21 08:51:48,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 530.0) internal successors, (1590), 3 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:48,985 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:48,986 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, 1, 1, 1, 1, 1] [2022-07-21 08:51:48,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-07-21 08:51:48,986 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:48,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:48,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1519862336, now seen corresponding path program 1 times [2022-07-21 08:51:48,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:48,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717740] [2022-07-21 08:51:48,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:48,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:49,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:49,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:49,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717740] [2022-07-21 08:51:49,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717740] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:49,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754739709] [2022-07-21 08:51:49,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:49,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:49,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:49,014 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:49,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-21 08:51:49,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:49,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:49,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:49,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:49,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754739709] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:49,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:49,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:49,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408684170] [2022-07-21 08:51:49,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:49,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:49,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:49,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:49,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:49,353 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 528 out of 667 [2022-07-21 08:51:49,354 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 543 transitions, 1186 flow. Second operand has 10 states, 10 states have (on average 530.3) internal successors, (5303), 10 states have internal predecessors, (5303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:49,354 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:49,355 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 528 of 667 [2022-07-21 08:51:49,355 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:49,670 INFO L129 PetriNetUnfolder]: 0/894 cut-off events. [2022-07-21 08:51:49,670 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-07-21 08:51:49,670 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 894 events. 0/894 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3002 event pairs, 0 based on Foata normal form. 2/896 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2022-07-21 08:51:49,672 INFO L132 encePairwiseOnDemand]: 661/667 looper letters, 28 selfloop transitions, 9 changer transitions 0/553 dead transitions. [2022-07-21 08:51:49,672 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 553 transitions, 1282 flow [2022-07-21 08:51:49,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:49,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:49,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4791 transitions. [2022-07-21 08:51:49,675 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7981009495252374 [2022-07-21 08:51:49,675 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4791 transitions. [2022-07-21 08:51:49,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4791 transitions. [2022-07-21 08:51:49,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:49,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4791 transitions. [2022-07-21 08:51:49,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 532.3333333333334) internal successors, (4791), 9 states have internal predecessors, (4791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:49,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 667.0) internal successors, (6670), 10 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:49,681 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 667.0) internal successors, (6670), 10 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:49,681 INFO L186 Difference]: Start difference. First operand has 583 places, 543 transitions, 1186 flow. Second operand 9 states and 4791 transitions. [2022-07-21 08:51:49,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 553 transitions, 1282 flow [2022-07-21 08:51:49,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 553 transitions, 1280 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:49,688 INFO L242 Difference]: Finished difference. Result has 593 places, 549 transitions, 1234 flow [2022-07-21 08:51:49,688 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1184, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1234, PETRI_PLACES=593, PETRI_TRANSITIONS=549} [2022-07-21 08:51:49,689 INFO L279 CegarLoopForPetriNet]: 592 programPoint places, 1 predicate places. [2022-07-21 08:51:49,689 INFO L495 AbstractCegarLoop]: Abstraction has has 593 places, 549 transitions, 1234 flow [2022-07-21 08:51:49,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 530.3) internal successors, (5303), 10 states have internal predecessors, (5303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:49,689 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:49,690 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] [2022-07-21 08:51:49,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-07-21 08:51:49,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-07-21 08:51:49,908 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:49,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:49,908 INFO L85 PathProgramCache]: Analyzing trace with hash 418737845, now seen corresponding path program 1 times [2022-07-21 08:51:49,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:49,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100817655] [2022-07-21 08:51:49,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:49,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:49,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:49,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100817655] [2022-07-21 08:51:49,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100817655] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:49,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863315067] [2022-07-21 08:51:49,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:49,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:49,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:49,958 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:49,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-21 08:51:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:50,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:51:50,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:50,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:50,373 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:50,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863315067] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:50,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:50,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:51:50,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800032463] [2022-07-21 08:51:50,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:50,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:51:50,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:50,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:51:50,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:51:50,377 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 528 out of 667 [2022-07-21 08:51:50,381 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 593 places, 549 transitions, 1234 flow. Second operand has 18 states, 18 states have (on average 530.6111111111111) internal successors, (9551), 18 states have internal predecessors, (9551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:50,381 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:50,381 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 528 of 667 [2022-07-21 08:51:50,381 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:50,766 INFO L129 PetriNetUnfolder]: 0/842 cut-off events. [2022-07-21 08:51:50,766 INFO L130 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2022-07-21 08:51:50,767 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1208 conditions, 842 events. 0/842 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2655 event pairs, 0 based on Foata normal form. 4/846 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2022-07-21 08:51:50,768 INFO L132 encePairwiseOnDemand]: 661/667 looper letters, 36 selfloop transitions, 21 changer transitions 0/573 dead transitions. [2022-07-21 08:51:50,768 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 573 transitions, 1456 flow [2022-07-21 08:51:50,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:51:50,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:51:50,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 11149 transitions. [2022-07-21 08:51:50,774 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7959591632755051 [2022-07-21 08:51:50,775 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 11149 transitions. [2022-07-21 08:51:50,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 11149 transitions. [2022-07-21 08:51:50,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:50,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 11149 transitions. [2022-07-21 08:51:50,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 530.9047619047619) internal successors, (11149), 21 states have internal predecessors, (11149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:50,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 667.0) internal successors, (14674), 22 states have internal predecessors, (14674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:50,853 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 667.0) internal successors, (14674), 22 states have internal predecessors, (14674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:50,853 INFO L186 Difference]: Start difference. First operand has 593 places, 549 transitions, 1234 flow. Second operand 21 states and 11149 transitions. [2022-07-21 08:51:50,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 573 transitions, 1456 flow [2022-07-21 08:51:50,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 573 transitions, 1442 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:50,860 INFO L242 Difference]: Finished difference. Result has 617 places, 562 transitions, 1358 flow [2022-07-21 08:51:50,860 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1358, PETRI_PLACES=617, PETRI_TRANSITIONS=562} [2022-07-21 08:51:50,861 INFO L279 CegarLoopForPetriNet]: 592 programPoint places, 25 predicate places. [2022-07-21 08:51:50,861 INFO L495 AbstractCegarLoop]: Abstraction has has 617 places, 562 transitions, 1358 flow [2022-07-21 08:51:50,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 530.6111111111111) internal successors, (9551), 18 states have internal predecessors, (9551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:50,862 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:50,862 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:50,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-07-21 08:51:51,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-07-21 08:51:51,082 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:51,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:51,082 INFO L85 PathProgramCache]: Analyzing trace with hash -899555925, now seen corresponding path program 1 times [2022-07-21 08:51:51,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:51,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137905173] [2022-07-21 08:51:51,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:51,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:51,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:51,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:51,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137905173] [2022-07-21 08:51:51,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137905173] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:51,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186285665] [2022-07-21 08:51:51,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:51,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:51,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:51,224 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:51,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-21 08:51:51,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:51,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:51:51,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:51,622 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:51,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:51,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186285665] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:51,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:51,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:51:51,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068028898] [2022-07-21 08:51:51,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:51,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:51:51,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:51,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:51:51,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:51:51,911 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 528 out of 667 [2022-07-21 08:51:51,916 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 562 transitions, 1358 flow. Second operand has 34 states, 34 states have (on average 530.7941176470588) internal successors, (18047), 34 states have internal predecessors, (18047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:51,916 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:51,916 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 528 of 667 [2022-07-21 08:51:51,916 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:52,616 INFO L129 PetriNetUnfolder]: 0/738 cut-off events. [2022-07-21 08:51:52,616 INFO L130 PetriNetUnfolder]: For 357/357 co-relation queries the response was YES. [2022-07-21 08:51:52,616 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1174 conditions, 738 events. 0/738 cut-off events. For 357/357 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1975 event pairs, 0 based on Foata normal form. 8/746 useless extension candidates. Maximal degree in co-relation 0. Up to 33 conditions per place. [2022-07-21 08:51:52,618 INFO L132 encePairwiseOnDemand]: 661/667 looper letters, 52 selfloop transitions, 45 changer transitions 0/613 dead transitions. [2022-07-21 08:51:52,618 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 661 places, 613 transitions, 1868 flow [2022-07-21 08:51:52,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 08:51:52,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-21 08:51:52,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 23865 transitions. [2022-07-21 08:51:52,628 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7951024487756122 [2022-07-21 08:51:52,628 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 23865 transitions. [2022-07-21 08:51:52,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 23865 transitions. [2022-07-21 08:51:52,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:52,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 23865 transitions. [2022-07-21 08:51:52,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 530.3333333333334) internal successors, (23865), 45 states have internal predecessors, (23865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:52,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 667.0) internal successors, (30682), 46 states have internal predecessors, (30682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:52,664 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 667.0) internal successors, (30682), 46 states have internal predecessors, (30682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:52,664 INFO L186 Difference]: Start difference. First operand has 617 places, 562 transitions, 1358 flow. Second operand 45 states and 23865 transitions. [2022-07-21 08:51:52,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 661 places, 613 transitions, 1868 flow [2022-07-21 08:51:52,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 655 places, 613 transitions, 1828 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-21 08:51:52,676 INFO L242 Difference]: Finished difference. Result has 664 places, 587 transitions, 1636 flow [2022-07-21 08:51:52,676 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1334, PETRI_DIFFERENCE_MINUEND_PLACES=611, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1636, PETRI_PLACES=664, PETRI_TRANSITIONS=587} [2022-07-21 08:51:52,676 INFO L279 CegarLoopForPetriNet]: 592 programPoint places, 72 predicate places. [2022-07-21 08:51:52,676 INFO L495 AbstractCegarLoop]: Abstraction has has 664 places, 587 transitions, 1636 flow [2022-07-21 08:51:52,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 530.7941176470588) internal successors, (18047), 34 states have internal predecessors, (18047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:52,678 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:52,678 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:52,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:52,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:52,893 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:52,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:52,893 INFO L85 PathProgramCache]: Analyzing trace with hash 707886023, now seen corresponding path program 1 times [2022-07-21 08:51:52,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:52,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271625399] [2022-07-21 08:51:52,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:52,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:53,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:53,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:53,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271625399] [2022-07-21 08:51:53,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271625399] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:53,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190564590] [2022-07-21 08:51:53,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:53,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:53,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:53,199 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:53,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-21 08:51:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:53,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 08:51:53,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:53,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:53,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:54,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:54,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190564590] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:54,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:54,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-21 08:51:54,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578422250] [2022-07-21 08:51:54,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:54,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-21 08:51:54,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:54,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-21 08:51:54,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-21 08:51:54,460 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 528 out of 667 [2022-07-21 08:51:54,469 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 664 places, 587 transitions, 1636 flow. Second operand has 66 states, 66 states have (on average 530.8939393939394) internal successors, (35039), 66 states have internal predecessors, (35039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:54,469 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:54,469 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 528 of 667 [2022-07-21 08:51:54,469 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:55,369 INFO L129 PetriNetUnfolder]: 0/686 cut-off events. [2022-07-21 08:51:55,369 INFO L130 PetriNetUnfolder]: For 651/651 co-relation queries the response was YES. [2022-07-21 08:51:55,370 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1159 conditions, 686 events. 0/686 cut-off events. For 651/651 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1659 event pairs, 0 based on Foata normal form. 4/690 useless extension candidates. Maximal degree in co-relation 0. Up to 32 conditions per place. [2022-07-21 08:51:55,371 INFO L132 encePairwiseOnDemand]: 662/667 looper letters, 57 selfloop transitions, 55 changer transitions 0/616 dead transitions. [2022-07-21 08:51:55,371 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 707 places, 616 transitions, 2082 flow [2022-07-21 08:51:55,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-21 08:51:55,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-07-21 08:51:55,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 30212 transitions. [2022-07-21 08:51:55,384 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7946553039269839 [2022-07-21 08:51:55,384 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 30212 transitions. [2022-07-21 08:51:55,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 30212 transitions. [2022-07-21 08:51:55,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:55,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 30212 transitions. [2022-07-21 08:51:55,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 530.0350877192982) internal successors, (30212), 57 states have internal predecessors, (30212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:55,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 667.0) internal successors, (38686), 58 states have internal predecessors, (38686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:55,430 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 667.0) internal successors, (38686), 58 states have internal predecessors, (38686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:55,430 INFO L186 Difference]: Start difference. First operand has 664 places, 587 transitions, 1636 flow. Second operand 57 states and 30212 transitions. [2022-07-21 08:51:55,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 707 places, 616 transitions, 2082 flow [2022-07-21 08:51:55,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 674 places, 616 transitions, 1929 flow, removed 13 selfloop flow, removed 33 redundant places. [2022-07-21 08:51:55,439 INFO L242 Difference]: Finished difference. Result has 674 places, 583 transitions, 1647 flow [2022-07-21 08:51:55,440 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=1647, PETRI_PLACES=674, PETRI_TRANSITIONS=583} [2022-07-21 08:51:55,440 INFO L279 CegarLoopForPetriNet]: 592 programPoint places, 82 predicate places. [2022-07-21 08:51:55,440 INFO L495 AbstractCegarLoop]: Abstraction has has 674 places, 583 transitions, 1647 flow [2022-07-21 08:51:55,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 530.8939393939394) internal successors, (35039), 66 states have internal predecessors, (35039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:55,444 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:55,444 INFO L200 CegarLoopForPetriNet]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:55,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:55,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:55,657 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:55,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:55,658 INFO L85 PathProgramCache]: Analyzing trace with hash 540044470, now seen corresponding path program 1 times [2022-07-21 08:51:55,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:55,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749968634] [2022-07-21 08:51:55,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:55,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:55,678 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:55,707 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:55,708 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:55,708 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:55,708 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:55,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-07-21 08:51:55,708 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:55,708 WARN L231 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:55,708 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2022-07-21 08:51:55,740 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:51:55,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 621 places, 700 transitions, 1837 flow [2022-07-21 08:51:56,063 INFO L129 PetriNetUnfolder]: 194/1436 cut-off events. [2022-07-21 08:51:56,063 INFO L130 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2022-07-21 08:51:56,133 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1684 conditions, 1436 events. 194/1436 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5451 event pairs, 0 based on Foata normal form. 0/1202 useless extension candidates. Maximal degree in co-relation 1562. Up to 40 conditions per place. [2022-07-21 08:51:56,134 INFO L82 GeneralOperation]: Start removeDead. Operand has 621 places, 700 transitions, 1837 flow [2022-07-21 08:51:56,159 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 621 places, 700 transitions, 1837 flow [2022-07-21 08:51:56,160 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:56,160 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:51:56,160 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:56,163 INFO L129 PetriNetUnfolder]: 5/89 cut-off events. [2022-07-21 08:51:56,163 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:56,164 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:56,164 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] [2022-07-21 08:51:56,164 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:56,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:56,164 INFO L85 PathProgramCache]: Analyzing trace with hash 327553959, now seen corresponding path program 1 times [2022-07-21 08:51:56,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:56,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223814109] [2022-07-21 08:51:56,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:56,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:56,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:56,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223814109] [2022-07-21 08:51:56,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223814109] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:56,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:56,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:56,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447229694] [2022-07-21 08:51:56,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:56,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:56,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:56,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:56,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:56,180 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 555 out of 700 [2022-07-21 08:51:56,181 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 700 transitions, 1837 flow. Second operand has 3 states, 3 states have (on average 556.0) internal successors, (1668), 3 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:56,181 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:56,181 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 555 of 700 [2022-07-21 08:51:56,181 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:56,553 INFO L129 PetriNetUnfolder]: 0/1197 cut-off events. [2022-07-21 08:51:56,553 INFO L130 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2022-07-21 08:51:56,553 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1564 conditions, 1197 events. 0/1197 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4960 event pairs, 0 based on Foata normal form. 6162/7321 useless extension candidates. Maximal degree in co-relation 0. Up to 114 conditions per place. [2022-07-21 08:51:56,555 INFO L132 encePairwiseOnDemand]: 579/700 looper letters, 28 selfloop transitions, 2 changer transitions 12/585 dead transitions. [2022-07-21 08:51:56,555 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 622 places, 585 transitions, 1667 flow [2022-07-21 08:51:56,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:56,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:56,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1821 transitions. [2022-07-21 08:51:56,556 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8671428571428571 [2022-07-21 08:51:56,556 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1821 transitions. [2022-07-21 08:51:56,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1821 transitions. [2022-07-21 08:51:56,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:56,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1821 transitions. [2022-07-21 08:51:56,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 607.0) internal successors, (1821), 3 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:56,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 700.0) internal successors, (2800), 4 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:56,559 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 700.0) internal successors, (2800), 4 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:56,559 INFO L186 Difference]: Start difference. First operand has 621 places, 700 transitions, 1837 flow. Second operand 3 states and 1821 transitions. [2022-07-21 08:51:56,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 622 places, 585 transitions, 1667 flow [2022-07-21 08:51:56,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 622 places, 585 transitions, 1325 flow, removed 171 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:56,566 INFO L242 Difference]: Finished difference. Result has 623 places, 570 transitions, 1245 flow [2022-07-21 08:51:56,566 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=700, PETRI_DIFFERENCE_MINUEND_FLOW=1257, PETRI_DIFFERENCE_MINUEND_PLACES=620, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1245, PETRI_PLACES=623, PETRI_TRANSITIONS=570} [2022-07-21 08:51:56,567 INFO L279 CegarLoopForPetriNet]: 621 programPoint places, 2 predicate places. [2022-07-21 08:51:56,567 INFO L495 AbstractCegarLoop]: Abstraction has has 623 places, 570 transitions, 1245 flow [2022-07-21 08:51:56,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 556.0) internal successors, (1668), 3 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:56,567 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:56,567 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:56,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-07-21 08:51:56,567 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:56,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:56,568 INFO L85 PathProgramCache]: Analyzing trace with hash -770945952, now seen corresponding path program 1 times [2022-07-21 08:51:56,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:56,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991412219] [2022-07-21 08:51:56,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:56,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:56,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:56,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:56,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991412219] [2022-07-21 08:51:56,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991412219] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:56,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124918731] [2022-07-21 08:51:56,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:56,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:56,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:56,589 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:56,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-21 08:51:56,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:56,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:56,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:56,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:56,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:56,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124918731] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:56,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:56,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:56,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3584229] [2022-07-21 08:51:56,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:56,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:56,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:56,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:56,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:56,880 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 554 out of 700 [2022-07-21 08:51:56,882 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 623 places, 570 transitions, 1245 flow. Second operand has 10 states, 10 states have (on average 556.3) internal successors, (5563), 10 states have internal predecessors, (5563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:56,882 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:56,882 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 554 of 700 [2022-07-21 08:51:56,882 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:57,223 INFO L129 PetriNetUnfolder]: 0/943 cut-off events. [2022-07-21 08:51:57,223 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-07-21 08:51:57,224 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1196 conditions, 943 events. 0/943 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3190 event pairs, 0 based on Foata normal form. 2/945 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2022-07-21 08:51:57,225 INFO L132 encePairwiseOnDemand]: 694/700 looper letters, 29 selfloop transitions, 9 changer transitions 0/580 dead transitions. [2022-07-21 08:51:57,225 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 619 places, 580 transitions, 1343 flow [2022-07-21 08:51:57,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:57,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:57,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5026 transitions. [2022-07-21 08:51:57,228 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7977777777777778 [2022-07-21 08:51:57,228 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5026 transitions. [2022-07-21 08:51:57,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5026 transitions. [2022-07-21 08:51:57,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:57,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5026 transitions. [2022-07-21 08:51:57,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 558.4444444444445) internal successors, (5026), 9 states have internal predecessors, (5026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:57,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 700.0) internal successors, (7000), 10 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:57,235 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 700.0) internal successors, (7000), 10 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:57,235 INFO L186 Difference]: Start difference. First operand has 623 places, 570 transitions, 1245 flow. Second operand 9 states and 5026 transitions. [2022-07-21 08:51:57,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 619 places, 580 transitions, 1343 flow [2022-07-21 08:51:57,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 618 places, 580 transitions, 1341 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:57,241 INFO L242 Difference]: Finished difference. Result has 621 places, 576 transitions, 1293 flow [2022-07-21 08:51:57,242 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=700, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=610, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1293, PETRI_PLACES=621, PETRI_TRANSITIONS=576} [2022-07-21 08:51:57,242 INFO L279 CegarLoopForPetriNet]: 621 programPoint places, 0 predicate places. [2022-07-21 08:51:57,242 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 576 transitions, 1293 flow [2022-07-21 08:51:57,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 556.3) internal successors, (5563), 10 states have internal predecessors, (5563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:57,243 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:57,243 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] [2022-07-21 08:51:57,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-07-21 08:51:57,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:57,458 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:57,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:57,458 INFO L85 PathProgramCache]: Analyzing trace with hash -707134443, now seen corresponding path program 1 times [2022-07-21 08:51:57,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:57,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654320380] [2022-07-21 08:51:57,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:57,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:57,497 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:57,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:57,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654320380] [2022-07-21 08:51:57,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654320380] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:57,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126052795] [2022-07-21 08:51:57,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:57,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:57,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:57,512 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:57,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-21 08:51:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:57,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:51:57,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:57,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:57,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126052795] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:57,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:57,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:51:57,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222543219] [2022-07-21 08:51:57,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:57,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:51:57,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:57,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:51:57,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:51:57,967 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 554 out of 700 [2022-07-21 08:51:57,969 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 576 transitions, 1293 flow. Second operand has 18 states, 18 states have (on average 556.6111111111111) internal successors, (10019), 18 states have internal predecessors, (10019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:57,969 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:57,969 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 554 of 700 [2022-07-21 08:51:57,970 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:58,437 INFO L129 PetriNetUnfolder]: 0/891 cut-off events. [2022-07-21 08:51:58,438 INFO L130 PetriNetUnfolder]: For 108/108 co-relation queries the response was YES. [2022-07-21 08:51:58,438 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1277 conditions, 891 events. 0/891 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2837 event pairs, 0 based on Foata normal form. 4/895 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2022-07-21 08:51:58,439 INFO L132 encePairwiseOnDemand]: 694/700 looper letters, 37 selfloop transitions, 21 changer transitions 0/600 dead transitions. [2022-07-21 08:51:58,439 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 641 places, 600 transitions, 1517 flow [2022-07-21 08:51:58,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:51:58,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:51:58,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 11696 transitions. [2022-07-21 08:51:58,444 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7956462585034013 [2022-07-21 08:51:58,445 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 11696 transitions. [2022-07-21 08:51:58,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 11696 transitions. [2022-07-21 08:51:58,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:58,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 11696 transitions. [2022-07-21 08:51:58,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 556.952380952381) internal successors, (11696), 21 states have internal predecessors, (11696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:58,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 700.0) internal successors, (15400), 22 states have internal predecessors, (15400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:58,460 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 700.0) internal successors, (15400), 22 states have internal predecessors, (15400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:58,460 INFO L186 Difference]: Start difference. First operand has 621 places, 576 transitions, 1293 flow. Second operand 21 states and 11696 transitions. [2022-07-21 08:51:58,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 641 places, 600 transitions, 1517 flow [2022-07-21 08:51:58,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 640 places, 600 transitions, 1503 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:58,467 INFO L242 Difference]: Finished difference. Result has 645 places, 589 transitions, 1417 flow [2022-07-21 08:51:58,468 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=700, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=620, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1417, PETRI_PLACES=645, PETRI_TRANSITIONS=589} [2022-07-21 08:51:58,468 INFO L279 CegarLoopForPetriNet]: 621 programPoint places, 24 predicate places. [2022-07-21 08:51:58,468 INFO L495 AbstractCegarLoop]: Abstraction has has 645 places, 589 transitions, 1417 flow [2022-07-21 08:51:58,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 556.6111111111111) internal successors, (10019), 18 states have internal predecessors, (10019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:58,469 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:58,469 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:58,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:58,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:58,688 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:58,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:58,688 INFO L85 PathProgramCache]: Analyzing trace with hash 865014155, now seen corresponding path program 1 times [2022-07-21 08:51:58,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:58,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405109039] [2022-07-21 08:51:58,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:58,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:58,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:58,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:58,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405109039] [2022-07-21 08:51:58,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405109039] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:58,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213284064] [2022-07-21 08:51:58,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:58,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:58,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:58,799 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:58,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-21 08:51:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:59,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:51:59,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:59,234 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:59,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:59,415 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:59,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213284064] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:59,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:59,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:51:59,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383805242] [2022-07-21 08:51:59,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:59,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:51:59,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:59,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:51:59,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:51:59,423 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 554 out of 700 [2022-07-21 08:51:59,428 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 645 places, 589 transitions, 1417 flow. Second operand has 34 states, 34 states have (on average 556.7941176470588) internal successors, (18931), 34 states have internal predecessors, (18931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:59,428 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:59,428 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 554 of 700 [2022-07-21 08:51:59,428 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:00,108 INFO L129 PetriNetUnfolder]: 0/787 cut-off events. [2022-07-21 08:52:00,108 INFO L130 PetriNetUnfolder]: For 384/384 co-relation queries the response was YES. [2022-07-21 08:52:00,109 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1252 conditions, 787 events. 0/787 cut-off events. For 384/384 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2155 event pairs, 0 based on Foata normal form. 8/795 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-07-21 08:52:00,110 INFO L132 encePairwiseOnDemand]: 694/700 looper letters, 53 selfloop transitions, 45 changer transitions 0/640 dead transitions. [2022-07-21 08:52:00,110 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 689 places, 640 transitions, 1929 flow [2022-07-21 08:52:00,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 08:52:00,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-21 08:52:00,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 25036 transitions. [2022-07-21 08:52:00,121 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7947936507936508 [2022-07-21 08:52:00,121 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 25036 transitions. [2022-07-21 08:52:00,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 25036 transitions. [2022-07-21 08:52:00,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:00,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 25036 transitions. [2022-07-21 08:52:00,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 556.3555555555556) internal successors, (25036), 45 states have internal predecessors, (25036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:00,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 700.0) internal successors, (32200), 46 states have internal predecessors, (32200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:00,158 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 700.0) internal successors, (32200), 46 states have internal predecessors, (32200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:00,159 INFO L186 Difference]: Start difference. First operand has 645 places, 589 transitions, 1417 flow. Second operand 45 states and 25036 transitions. [2022-07-21 08:52:00,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 689 places, 640 transitions, 1929 flow [2022-07-21 08:52:00,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 683 places, 640 transitions, 1889 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-21 08:52:00,167 INFO L242 Difference]: Finished difference. Result has 692 places, 614 transitions, 1695 flow [2022-07-21 08:52:00,167 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=700, PETRI_DIFFERENCE_MINUEND_FLOW=1393, PETRI_DIFFERENCE_MINUEND_PLACES=639, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1695, PETRI_PLACES=692, PETRI_TRANSITIONS=614} [2022-07-21 08:52:00,168 INFO L279 CegarLoopForPetriNet]: 621 programPoint places, 71 predicate places. [2022-07-21 08:52:00,168 INFO L495 AbstractCegarLoop]: Abstraction has has 692 places, 614 transitions, 1695 flow [2022-07-21 08:52:00,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 556.7941176470588) internal successors, (18931), 34 states have internal predecessors, (18931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:00,170 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:00,170 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:00,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:00,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-07-21 08:52:00,383 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:00,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:00,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1247181991, now seen corresponding path program 1 times [2022-07-21 08:52:00,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:00,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128523741] [2022-07-21 08:52:00,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:00,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:00,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:00,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128523741] [2022-07-21 08:52:00,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128523741] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:00,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754101875] [2022-07-21 08:52:00,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:00,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:00,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:00,680 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:00,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-21 08:52:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:01,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 08:52:01,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:01,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:01,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754101875] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:01,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:01,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-21 08:52:01,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101026502] [2022-07-21 08:52:01,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:01,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-21 08:52:01,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:01,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-21 08:52:01,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-21 08:52:01,708 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 554 out of 700 [2022-07-21 08:52:01,717 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 692 places, 614 transitions, 1695 flow. Second operand has 66 states, 66 states have (on average 556.8939393939394) internal successors, (36755), 66 states have internal predecessors, (36755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:01,718 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:01,718 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 554 of 700 [2022-07-21 08:52:01,718 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:02,427 INFO L129 PetriNetUnfolder]: 0/722 cut-off events. [2022-07-21 08:52:02,427 INFO L130 PetriNetUnfolder]: For 772/772 co-relation queries the response was YES. [2022-07-21 08:52:02,428 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1221 conditions, 722 events. 0/722 cut-off events. For 772/772 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1757 event pairs, 0 based on Foata normal form. 5/727 useless extension candidates. Maximal degree in co-relation 0. Up to 34 conditions per place. [2022-07-21 08:52:02,429 INFO L132 encePairwiseOnDemand]: 695/700 looper letters, 60 selfloop transitions, 58 changer transitions 0/648 dead transitions. [2022-07-21 08:52:02,429 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 738 places, 648 transitions, 2197 flow [2022-07-21 08:52:02,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-21 08:52:02,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-21 08:52:02,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 33363 transitions. [2022-07-21 08:52:02,448 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7943571428571429 [2022-07-21 08:52:02,448 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 33363 transitions. [2022-07-21 08:52:02,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 33363 transitions. [2022-07-21 08:52:02,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:02,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 33363 transitions. [2022-07-21 08:52:02,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 556.05) internal successors, (33363), 60 states have internal predecessors, (33363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:02,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 700.0) internal successors, (42700), 61 states have internal predecessors, (42700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:02,498 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 700.0) internal successors, (42700), 61 states have internal predecessors, (42700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:02,498 INFO L186 Difference]: Start difference. First operand has 692 places, 614 transitions, 1695 flow. Second operand 60 states and 33363 transitions. [2022-07-21 08:52:02,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 738 places, 648 transitions, 2197 flow [2022-07-21 08:52:02,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 648 transitions, 2036 flow, removed 14 selfloop flow, removed 33 redundant places. [2022-07-21 08:52:02,507 INFO L242 Difference]: Finished difference. Result has 705 places, 613 transitions, 1735 flow [2022-07-21 08:52:02,507 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=700, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=646, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=1735, PETRI_PLACES=705, PETRI_TRANSITIONS=613} [2022-07-21 08:52:02,507 INFO L279 CegarLoopForPetriNet]: 621 programPoint places, 84 predicate places. [2022-07-21 08:52:02,508 INFO L495 AbstractCegarLoop]: Abstraction has has 705 places, 613 transitions, 1735 flow [2022-07-21 08:52:02,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 556.8939393939394) internal successors, (36755), 66 states have internal predecessors, (36755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:02,511 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:02,511 INFO L200 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:02,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:02,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-07-21 08:52:02,714 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:02,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:02,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1309795873, now seen corresponding path program 1 times [2022-07-21 08:52:02,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:02,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346140869] [2022-07-21 08:52:02,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:02,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:02,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:52:02,736 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:52:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:52:02,819 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:52:02,831 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:52:02,831 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:52:02,831 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:52:02,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-07-21 08:52:02,832 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 08:52:02,833 WARN L231 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:52:02,833 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2022-07-21 08:52:02,898 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:52:02,901 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 650 places, 733 transitions, 1946 flow [2022-07-21 08:52:03,281 INFO L129 PetriNetUnfolder]: 204/1508 cut-off events. [2022-07-21 08:52:03,281 INFO L130 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2022-07-21 08:52:03,359 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1779 conditions, 1508 events. 204/1508 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5720 event pairs, 0 based on Foata normal form. 0/1262 useless extension candidates. Maximal degree in co-relation 1656. Up to 42 conditions per place. [2022-07-21 08:52:03,359 INFO L82 GeneralOperation]: Start removeDead. Operand has 650 places, 733 transitions, 1946 flow [2022-07-21 08:52:03,397 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 650 places, 733 transitions, 1946 flow [2022-07-21 08:52:03,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:52:03,398 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:52:03,398 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:52:03,401 INFO L129 PetriNetUnfolder]: 5/90 cut-off events. [2022-07-21 08:52:03,401 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:52:03,401 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:03,401 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] [2022-07-21 08:52:03,401 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:03,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:03,402 INFO L85 PathProgramCache]: Analyzing trace with hash -2053273849, now seen corresponding path program 1 times [2022-07-21 08:52:03,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:03,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111890557] [2022-07-21 08:52:03,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:03,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:03,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:03,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111890557] [2022-07-21 08:52:03,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111890557] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:52:03,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:52:03,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:52:03,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335959855] [2022-07-21 08:52:03,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:52:03,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:52:03,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:03,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:52:03,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:52:03,419 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 581 out of 733 [2022-07-21 08:52:03,420 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 650 places, 733 transitions, 1946 flow. Second operand has 3 states, 3 states have (on average 582.0) internal successors, (1746), 3 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:03,420 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:03,420 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 581 of 733 [2022-07-21 08:52:03,421 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:03,917 INFO L129 PetriNetUnfolder]: 0/1258 cut-off events. [2022-07-21 08:52:03,917 INFO L130 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2022-07-21 08:52:03,918 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1654 conditions, 1258 events. 0/1258 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5235 event pairs, 0 based on Foata normal form. 6845/8063 useless extension candidates. Maximal degree in co-relation 0. Up to 120 conditions per place. [2022-07-21 08:52:03,920 INFO L132 encePairwiseOnDemand]: 606/733 looper letters, 29 selfloop transitions, 2 changer transitions 12/612 dead transitions. [2022-07-21 08:52:03,920 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 651 places, 612 transitions, 1766 flow [2022-07-21 08:52:03,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:52:03,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:52:03,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1906 transitions. [2022-07-21 08:52:03,922 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8667576170986813 [2022-07-21 08:52:03,922 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1906 transitions. [2022-07-21 08:52:03,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1906 transitions. [2022-07-21 08:52:03,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:03,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1906 transitions. [2022-07-21 08:52:03,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 635.3333333333334) internal successors, (1906), 3 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:03,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 733.0) internal successors, (2932), 4 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:03,925 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 733.0) internal successors, (2932), 4 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:03,925 INFO L186 Difference]: Start difference. First operand has 650 places, 733 transitions, 1946 flow. Second operand 3 states and 1906 transitions. [2022-07-21 08:52:03,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 651 places, 612 transitions, 1766 flow [2022-07-21 08:52:03,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 651 places, 612 transitions, 1386 flow, removed 190 selfloop flow, removed 0 redundant places. [2022-07-21 08:52:03,936 INFO L242 Difference]: Finished difference. Result has 652 places, 597 transitions, 1304 flow [2022-07-21 08:52:03,937 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=733, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=649, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1304, PETRI_PLACES=652, PETRI_TRANSITIONS=597} [2022-07-21 08:52:03,939 INFO L279 CegarLoopForPetriNet]: 650 programPoint places, 2 predicate places. [2022-07-21 08:52:03,940 INFO L495 AbstractCegarLoop]: Abstraction has has 652 places, 597 transitions, 1304 flow [2022-07-21 08:52:03,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 582.0) internal successors, (1746), 3 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:03,940 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:03,941 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:03,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-07-21 08:52:03,941 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:03,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:03,941 INFO L85 PathProgramCache]: Analyzing trace with hash 208730624, now seen corresponding path program 1 times [2022-07-21 08:52:03,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:03,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281385367] [2022-07-21 08:52:03,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:03,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:03,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:03,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281385367] [2022-07-21 08:52:03,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281385367] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:03,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824205211] [2022-07-21 08:52:03,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:03,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:03,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:03,991 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:03,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-21 08:52:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:04,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:52:04,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:04,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:04,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:04,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824205211] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:04,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:04,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:52:04,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486569634] [2022-07-21 08:52:04,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:04,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:52:04,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:04,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:52:04,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:52:04,327 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 580 out of 733 [2022-07-21 08:52:04,328 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 652 places, 597 transitions, 1304 flow. Second operand has 10 states, 10 states have (on average 582.3) internal successors, (5823), 10 states have internal predecessors, (5823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:04,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:04,328 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 580 of 733 [2022-07-21 08:52:04,328 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:04,688 INFO L129 PetriNetUnfolder]: 0/992 cut-off events. [2022-07-21 08:52:04,689 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-07-21 08:52:04,689 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1258 conditions, 992 events. 0/992 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3363 event pairs, 0 based on Foata normal form. 2/994 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2022-07-21 08:52:04,691 INFO L132 encePairwiseOnDemand]: 727/733 looper letters, 30 selfloop transitions, 9 changer transitions 0/607 dead transitions. [2022-07-21 08:52:04,691 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 648 places, 607 transitions, 1404 flow [2022-07-21 08:52:04,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:52:04,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:52:04,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5261 transitions. [2022-07-21 08:52:04,694 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7974837047142641 [2022-07-21 08:52:04,694 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5261 transitions. [2022-07-21 08:52:04,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5261 transitions. [2022-07-21 08:52:04,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:04,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5261 transitions. [2022-07-21 08:52:04,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 584.5555555555555) internal successors, (5261), 9 states have internal predecessors, (5261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:04,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 733.0) internal successors, (7330), 10 states have internal predecessors, (7330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:04,700 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 733.0) internal successors, (7330), 10 states have internal predecessors, (7330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:04,700 INFO L186 Difference]: Start difference. First operand has 652 places, 597 transitions, 1304 flow. Second operand 9 states and 5261 transitions. [2022-07-21 08:52:04,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 648 places, 607 transitions, 1404 flow [2022-07-21 08:52:04,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 647 places, 607 transitions, 1402 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:04,707 INFO L242 Difference]: Finished difference. Result has 650 places, 603 transitions, 1352 flow [2022-07-21 08:52:04,707 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=733, PETRI_DIFFERENCE_MINUEND_FLOW=1302, PETRI_DIFFERENCE_MINUEND_PLACES=639, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1352, PETRI_PLACES=650, PETRI_TRANSITIONS=603} [2022-07-21 08:52:04,708 INFO L279 CegarLoopForPetriNet]: 650 programPoint places, 0 predicate places. [2022-07-21 08:52:04,708 INFO L495 AbstractCegarLoop]: Abstraction has has 650 places, 603 transitions, 1352 flow [2022-07-21 08:52:04,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 582.3) internal successors, (5823), 10 states have internal predecessors, (5823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:04,708 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:04,708 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] [2022-07-21 08:52:04,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:04,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-07-21 08:52:04,927 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:04,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:04,927 INFO L85 PathProgramCache]: Analyzing trace with hash 329362997, now seen corresponding path program 1 times [2022-07-21 08:52:04,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:04,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840376545] [2022-07-21 08:52:04,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:04,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:04,996 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:04,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:04,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840376545] [2022-07-21 08:52:04,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840376545] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:04,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134826038] [2022-07-21 08:52:04,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:04,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:04,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:04,999 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:05,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-21 08:52:05,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:05,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:52:05,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:05,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:05,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134826038] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:05,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:05,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:52:05,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245037252] [2022-07-21 08:52:05,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:05,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:52:05,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:05,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:52:05,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:52:05,499 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 580 out of 733 [2022-07-21 08:52:05,502 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 650 places, 603 transitions, 1352 flow. Second operand has 18 states, 18 states have (on average 582.6111111111111) internal successors, (10487), 18 states have internal predecessors, (10487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:05,502 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:05,502 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 580 of 733 [2022-07-21 08:52:05,502 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:05,948 INFO L129 PetriNetUnfolder]: 0/940 cut-off events. [2022-07-21 08:52:05,948 INFO L130 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-07-21 08:52:05,949 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1347 conditions, 940 events. 0/940 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3025 event pairs, 0 based on Foata normal form. 4/944 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2022-07-21 08:52:05,950 INFO L132 encePairwiseOnDemand]: 727/733 looper letters, 38 selfloop transitions, 21 changer transitions 0/627 dead transitions. [2022-07-21 08:52:05,950 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 670 places, 627 transitions, 1578 flow [2022-07-21 08:52:05,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:52:05,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:52:05,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 12243 transitions. [2022-07-21 08:52:05,997 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7953615279672579 [2022-07-21 08:52:05,997 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 12243 transitions. [2022-07-21 08:52:05,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 12243 transitions. [2022-07-21 08:52:05,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:05,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 12243 transitions. [2022-07-21 08:52:06,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 583.0) internal successors, (12243), 21 states have internal predecessors, (12243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:06,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 733.0) internal successors, (16126), 22 states have internal predecessors, (16126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:06,013 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 733.0) internal successors, (16126), 22 states have internal predecessors, (16126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:06,013 INFO L186 Difference]: Start difference. First operand has 650 places, 603 transitions, 1352 flow. Second operand 21 states and 12243 transitions. [2022-07-21 08:52:06,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 670 places, 627 transitions, 1578 flow [2022-07-21 08:52:06,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 627 transitions, 1564 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:06,020 INFO L242 Difference]: Finished difference. Result has 674 places, 616 transitions, 1476 flow [2022-07-21 08:52:06,020 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=733, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=649, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1476, PETRI_PLACES=674, PETRI_TRANSITIONS=616} [2022-07-21 08:52:06,020 INFO L279 CegarLoopForPetriNet]: 650 programPoint places, 24 predicate places. [2022-07-21 08:52:06,020 INFO L495 AbstractCegarLoop]: Abstraction has has 674 places, 616 transitions, 1476 flow [2022-07-21 08:52:06,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 582.6111111111111) internal successors, (10487), 18 states have internal predecessors, (10487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:06,022 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:06,022 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:06,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:06,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-07-21 08:52:06,241 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:06,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:06,241 INFO L85 PathProgramCache]: Analyzing trace with hash 179244203, now seen corresponding path program 1 times [2022-07-21 08:52:06,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:06,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636528093] [2022-07-21 08:52:06,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:06,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:06,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:06,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636528093] [2022-07-21 08:52:06,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636528093] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:06,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672084349] [2022-07-21 08:52:06,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:06,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:06,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:06,347 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:06,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-21 08:52:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:06,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:52:06,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:06,795 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:06,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:07,011 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:07,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672084349] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:07,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:07,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:52:07,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945278433] [2022-07-21 08:52:07,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:07,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:52:07,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:07,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:52:07,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:52:07,019 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 580 out of 733 [2022-07-21 08:52:07,024 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 674 places, 616 transitions, 1476 flow. Second operand has 34 states, 34 states have (on average 582.7941176470588) internal successors, (19815), 34 states have internal predecessors, (19815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:07,024 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:07,024 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 580 of 733 [2022-07-21 08:52:07,024 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:07,736 INFO L129 PetriNetUnfolder]: 0/836 cut-off events. [2022-07-21 08:52:07,736 INFO L130 PetriNetUnfolder]: For 411/411 co-relation queries the response was YES. [2022-07-21 08:52:07,736 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1331 conditions, 836 events. 0/836 cut-off events. For 411/411 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2343 event pairs, 0 based on Foata normal form. 8/844 useless extension candidates. Maximal degree in co-relation 0. Up to 37 conditions per place. [2022-07-21 08:52:07,738 INFO L132 encePairwiseOnDemand]: 727/733 looper letters, 54 selfloop transitions, 45 changer transitions 0/667 dead transitions. [2022-07-21 08:52:07,738 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 718 places, 667 transitions, 1990 flow [2022-07-21 08:52:07,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 08:52:07,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-21 08:52:07,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 26207 transitions. [2022-07-21 08:52:07,749 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7945126572684553 [2022-07-21 08:52:07,749 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 26207 transitions. [2022-07-21 08:52:07,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 26207 transitions. [2022-07-21 08:52:07,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:07,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 26207 transitions. [2022-07-21 08:52:07,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 582.3777777777777) internal successors, (26207), 45 states have internal predecessors, (26207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:07,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 733.0) internal successors, (33718), 46 states have internal predecessors, (33718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:07,787 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 733.0) internal successors, (33718), 46 states have internal predecessors, (33718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:07,788 INFO L186 Difference]: Start difference. First operand has 674 places, 616 transitions, 1476 flow. Second operand 45 states and 26207 transitions. [2022-07-21 08:52:07,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 718 places, 667 transitions, 1990 flow [2022-07-21 08:52:07,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 712 places, 667 transitions, 1950 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-21 08:52:07,797 INFO L242 Difference]: Finished difference. Result has 721 places, 641 transitions, 1754 flow [2022-07-21 08:52:07,797 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=733, PETRI_DIFFERENCE_MINUEND_FLOW=1452, PETRI_DIFFERENCE_MINUEND_PLACES=668, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1754, PETRI_PLACES=721, PETRI_TRANSITIONS=641} [2022-07-21 08:52:07,797 INFO L279 CegarLoopForPetriNet]: 650 programPoint places, 71 predicate places. [2022-07-21 08:52:07,797 INFO L495 AbstractCegarLoop]: Abstraction has has 721 places, 641 transitions, 1754 flow [2022-07-21 08:52:07,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 582.7941176470588) internal successors, (19815), 34 states have internal predecessors, (19815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:07,799 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:07,799 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:07,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:08,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-07-21 08:52:08,018 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:08,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:08,018 INFO L85 PathProgramCache]: Analyzing trace with hash -235927097, now seen corresponding path program 1 times [2022-07-21 08:52:08,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:08,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408733641] [2022-07-21 08:52:08,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:08,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:08,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:08,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:08,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408733641] [2022-07-21 08:52:08,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408733641] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:08,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822630030] [2022-07-21 08:52:08,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:08,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:08,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:08,316 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:08,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-21 08:52:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:08,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 08:52:08,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:08,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:08,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:09,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:09,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822630030] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:09,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:09,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-21 08:52:09,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290041202] [2022-07-21 08:52:09,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:09,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-21 08:52:09,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:09,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-21 08:52:09,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-21 08:52:09,666 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 580 out of 733 [2022-07-21 08:52:09,676 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 721 places, 641 transitions, 1754 flow. Second operand has 66 states, 66 states have (on average 582.8939393939394) internal successors, (38471), 66 states have internal predecessors, (38471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:09,677 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:09,677 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 580 of 733 [2022-07-21 08:52:09,677 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:10,516 INFO L129 PetriNetUnfolder]: 0/758 cut-off events. [2022-07-21 08:52:10,516 INFO L130 PetriNetUnfolder]: For 893/893 co-relation queries the response was YES. [2022-07-21 08:52:10,517 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1284 conditions, 758 events. 0/758 cut-off events. For 893/893 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1855 event pairs, 0 based on Foata normal form. 6/764 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-07-21 08:52:10,517 INFO L132 encePairwiseOnDemand]: 728/733 looper letters, 63 selfloop transitions, 61 changer transitions 0/680 dead transitions. [2022-07-21 08:52:10,518 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 770 places, 680 transitions, 2312 flow [2022-07-21 08:52:10,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-21 08:52:10,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-07-21 08:52:10,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 36670 transitions. [2022-07-21 08:52:10,532 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.794083890946101 [2022-07-21 08:52:10,533 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 36670 transitions. [2022-07-21 08:52:10,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 36670 transitions. [2022-07-21 08:52:10,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:10,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 36670 transitions. [2022-07-21 08:52:10,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 582.063492063492) internal successors, (36670), 63 states have internal predecessors, (36670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:10,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 733.0) internal successors, (46912), 64 states have internal predecessors, (46912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:10,589 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 733.0) internal successors, (46912), 64 states have internal predecessors, (46912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:10,589 INFO L186 Difference]: Start difference. First operand has 721 places, 641 transitions, 1754 flow. Second operand 63 states and 36670 transitions. [2022-07-21 08:52:10,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 770 places, 680 transitions, 2312 flow [2022-07-21 08:52:10,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 737 places, 680 transitions, 2143 flow, removed 15 selfloop flow, removed 33 redundant places. [2022-07-21 08:52:10,598 INFO L242 Difference]: Finished difference. Result has 737 places, 643 transitions, 1823 flow [2022-07-21 08:52:10,599 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=733, PETRI_DIFFERENCE_MINUEND_FLOW=1586, PETRI_DIFFERENCE_MINUEND_PLACES=675, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=1823, PETRI_PLACES=737, PETRI_TRANSITIONS=643} [2022-07-21 08:52:10,599 INFO L279 CegarLoopForPetriNet]: 650 programPoint places, 87 predicate places. [2022-07-21 08:52:10,599 INFO L495 AbstractCegarLoop]: Abstraction has has 737 places, 643 transitions, 1823 flow [2022-07-21 08:52:10,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 582.8939393939394) internal successors, (38471), 66 states have internal predecessors, (38471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:10,603 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:10,603 INFO L200 CegarLoopForPetriNet]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:10,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-07-21 08:52:10,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-07-21 08:52:10,822 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:10,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:10,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1626237267, now seen corresponding path program 1 times [2022-07-21 08:52:10,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:10,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913647630] [2022-07-21 08:52:10,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:10,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:10,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:52:10,844 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:52:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:52:10,876 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:52:10,876 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:52:10,876 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:52:10,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:52:10,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-07-21 08:52:10,877 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 08:52:10,877 WARN L231 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:52:10,877 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2022-07-21 08:52:10,915 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:52:10,919 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 679 places, 766 transitions, 2057 flow [2022-07-21 08:52:11,304 INFO L129 PetriNetUnfolder]: 214/1580 cut-off events. [2022-07-21 08:52:11,305 INFO L130 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2022-07-21 08:52:11,383 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1875 conditions, 1580 events. 214/1580 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6012 event pairs, 0 based on Foata normal form. 0/1322 useless extension candidates. Maximal degree in co-relation 1751. Up to 44 conditions per place. [2022-07-21 08:52:11,383 INFO L82 GeneralOperation]: Start removeDead. Operand has 679 places, 766 transitions, 2057 flow [2022-07-21 08:52:11,416 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 679 places, 766 transitions, 2057 flow [2022-07-21 08:52:11,416 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:52:11,416 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:52:11,417 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:52:11,420 INFO L129 PetriNetUnfolder]: 5/89 cut-off events. [2022-07-21 08:52:11,420 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:52:11,420 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:11,420 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:11,420 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:11,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:11,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1599402311, now seen corresponding path program 1 times [2022-07-21 08:52:11,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:11,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352058021] [2022-07-21 08:52:11,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:11,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:11,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:11,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352058021] [2022-07-21 08:52:11,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352058021] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:52:11,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:52:11,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:52:11,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154524160] [2022-07-21 08:52:11,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:52:11,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:52:11,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:11,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:52:11,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:52:11,438 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 607 out of 766 [2022-07-21 08:52:11,438 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 679 places, 766 transitions, 2057 flow. Second operand has 3 states, 3 states have (on average 608.0) internal successors, (1824), 3 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:11,438 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:11,438 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 607 of 766 [2022-07-21 08:52:11,439 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:11,926 INFO L129 PetriNetUnfolder]: 0/1319 cut-off events. [2022-07-21 08:52:11,926 INFO L130 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2022-07-21 08:52:11,927 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1745 conditions, 1319 events. 0/1319 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5476 event pairs, 0 based on Foata normal form. 7564/8841 useless extension candidates. Maximal degree in co-relation 0. Up to 126 conditions per place. [2022-07-21 08:52:11,928 INFO L132 encePairwiseOnDemand]: 633/766 looper letters, 30 selfloop transitions, 2 changer transitions 12/639 dead transitions. [2022-07-21 08:52:11,928 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 680 places, 639 transitions, 1867 flow [2022-07-21 08:52:11,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:52:11,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:52:11,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1991 transitions. [2022-07-21 08:52:11,930 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8664055700609226 [2022-07-21 08:52:11,930 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1991 transitions. [2022-07-21 08:52:11,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1991 transitions. [2022-07-21 08:52:11,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:11,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1991 transitions. [2022-07-21 08:52:11,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 663.6666666666666) internal successors, (1991), 3 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:11,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:11,933 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:11,933 INFO L186 Difference]: Start difference. First operand has 679 places, 766 transitions, 2057 flow. Second operand 3 states and 1991 transitions. [2022-07-21 08:52:11,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 680 places, 639 transitions, 1867 flow [2022-07-21 08:52:11,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 680 places, 639 transitions, 1447 flow, removed 210 selfloop flow, removed 0 redundant places. [2022-07-21 08:52:11,940 INFO L242 Difference]: Finished difference. Result has 681 places, 624 transitions, 1363 flow [2022-07-21 08:52:11,940 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=678, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1363, PETRI_PLACES=681, PETRI_TRANSITIONS=624} [2022-07-21 08:52:11,941 INFO L279 CegarLoopForPetriNet]: 679 programPoint places, 2 predicate places. [2022-07-21 08:52:11,941 INFO L495 AbstractCegarLoop]: Abstraction has has 681 places, 624 transitions, 1363 flow [2022-07-21 08:52:11,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 608.0) internal successors, (1824), 3 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:11,941 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:11,941 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:11,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-07-21 08:52:11,941 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:11,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:11,942 INFO L85 PathProgramCache]: Analyzing trace with hash 163924768, now seen corresponding path program 1 times [2022-07-21 08:52:11,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:11,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027508092] [2022-07-21 08:52:11,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:11,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:11,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:11,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:11,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027508092] [2022-07-21 08:52:11,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027508092] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:11,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445901913] [2022-07-21 08:52:11,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:11,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:11,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:11,973 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:11,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-21 08:52:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:12,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:52:12,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:12,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:12,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:12,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445901913] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:12,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:12,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:52:12,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734770022] [2022-07-21 08:52:12,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:12,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:52:12,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:12,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:52:12,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:52:12,378 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 606 out of 766 [2022-07-21 08:52:12,380 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 681 places, 624 transitions, 1363 flow. Second operand has 10 states, 10 states have (on average 608.3) internal successors, (6083), 10 states have internal predecessors, (6083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:12,380 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:12,380 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 606 of 766 [2022-07-21 08:52:12,380 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:12,751 INFO L129 PetriNetUnfolder]: 0/1041 cut-off events. [2022-07-21 08:52:12,751 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-07-21 08:52:12,752 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1320 conditions, 1041 events. 0/1041 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3549 event pairs, 0 based on Foata normal form. 2/1043 useless extension candidates. Maximal degree in co-relation 0. Up to 79 conditions per place. [2022-07-21 08:52:12,753 INFO L132 encePairwiseOnDemand]: 760/766 looper letters, 31 selfloop transitions, 9 changer transitions 0/634 dead transitions. [2022-07-21 08:52:12,753 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 677 places, 634 transitions, 1465 flow [2022-07-21 08:52:12,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:52:12,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:52:12,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5496 transitions. [2022-07-21 08:52:12,756 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7972149695387293 [2022-07-21 08:52:12,757 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5496 transitions. [2022-07-21 08:52:12,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5496 transitions. [2022-07-21 08:52:12,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:12,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5496 transitions. [2022-07-21 08:52:12,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 610.6666666666666) internal successors, (5496), 9 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:12,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 766.0) internal successors, (7660), 10 states have internal predecessors, (7660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:12,764 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 766.0) internal successors, (7660), 10 states have internal predecessors, (7660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:12,764 INFO L186 Difference]: Start difference. First operand has 681 places, 624 transitions, 1363 flow. Second operand 9 states and 5496 transitions. [2022-07-21 08:52:12,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 677 places, 634 transitions, 1465 flow [2022-07-21 08:52:12,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 676 places, 634 transitions, 1463 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:12,771 INFO L242 Difference]: Finished difference. Result has 679 places, 630 transitions, 1411 flow [2022-07-21 08:52:12,771 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=1361, PETRI_DIFFERENCE_MINUEND_PLACES=668, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1411, PETRI_PLACES=679, PETRI_TRANSITIONS=630} [2022-07-21 08:52:12,772 INFO L279 CegarLoopForPetriNet]: 679 programPoint places, 0 predicate places. [2022-07-21 08:52:12,772 INFO L495 AbstractCegarLoop]: Abstraction has has 679 places, 630 transitions, 1411 flow [2022-07-21 08:52:12,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 608.3) internal successors, (6083), 10 states have internal predecessors, (6083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:12,772 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:12,773 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] [2022-07-21 08:52:12,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:12,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:12,987 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:12,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:12,987 INFO L85 PathProgramCache]: Analyzing trace with hash -766737131, now seen corresponding path program 1 times [2022-07-21 08:52:12,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:12,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521287238] [2022-07-21 08:52:12,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:12,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:12,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:13,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:13,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521287238] [2022-07-21 08:52:13,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521287238] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:13,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644884926] [2022-07-21 08:52:13,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:13,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:13,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:13,080 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:13,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-21 08:52:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:13,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:52:13,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:13,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:13,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644884926] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:13,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:13,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:52:13,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592659004] [2022-07-21 08:52:13,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:13,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:52:13,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:13,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:52:13,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:52:13,603 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 606 out of 766 [2022-07-21 08:52:13,606 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 679 places, 630 transitions, 1411 flow. Second operand has 18 states, 18 states have (on average 608.6111111111111) internal successors, (10955), 18 states have internal predecessors, (10955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:13,606 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:13,606 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 606 of 766 [2022-07-21 08:52:13,606 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:14,185 INFO L129 PetriNetUnfolder]: 0/989 cut-off events. [2022-07-21 08:52:14,185 INFO L130 PetriNetUnfolder]: For 120/120 co-relation queries the response was YES. [2022-07-21 08:52:14,186 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1417 conditions, 989 events. 0/989 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3208 event pairs, 0 based on Foata normal form. 4/993 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2022-07-21 08:52:14,187 INFO L132 encePairwiseOnDemand]: 760/766 looper letters, 39 selfloop transitions, 21 changer transitions 0/654 dead transitions. [2022-07-21 08:52:14,188 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 699 places, 654 transitions, 1639 flow [2022-07-21 08:52:14,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:52:14,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:52:14,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 12790 transitions. [2022-07-21 08:52:14,193 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7951013303493721 [2022-07-21 08:52:14,193 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 12790 transitions. [2022-07-21 08:52:14,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 12790 transitions. [2022-07-21 08:52:14,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:14,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 12790 transitions. [2022-07-21 08:52:14,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 609.047619047619) internal successors, (12790), 21 states have internal predecessors, (12790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:14,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 766.0) internal successors, (16852), 22 states have internal predecessors, (16852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:14,211 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 766.0) internal successors, (16852), 22 states have internal predecessors, (16852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:14,211 INFO L186 Difference]: Start difference. First operand has 679 places, 630 transitions, 1411 flow. Second operand 21 states and 12790 transitions. [2022-07-21 08:52:14,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 699 places, 654 transitions, 1639 flow [2022-07-21 08:52:14,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 698 places, 654 transitions, 1625 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:14,219 INFO L242 Difference]: Finished difference. Result has 703 places, 643 transitions, 1535 flow [2022-07-21 08:52:14,219 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=1405, PETRI_DIFFERENCE_MINUEND_PLACES=678, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1535, PETRI_PLACES=703, PETRI_TRANSITIONS=643} [2022-07-21 08:52:14,220 INFO L279 CegarLoopForPetriNet]: 679 programPoint places, 24 predicate places. [2022-07-21 08:52:14,220 INFO L495 AbstractCegarLoop]: Abstraction has has 703 places, 643 transitions, 1535 flow [2022-07-21 08:52:14,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 608.6111111111111) internal successors, (10955), 18 states have internal predecessors, (10955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:14,221 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:14,221 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:14,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:14,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:14,435 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:14,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:14,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1338101515, now seen corresponding path program 1 times [2022-07-21 08:52:14,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:14,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262026009] [2022-07-21 08:52:14,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:14,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:14,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:14,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262026009] [2022-07-21 08:52:14,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262026009] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:14,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115348911] [2022-07-21 08:52:14,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:14,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:14,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:14,543 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:14,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-07-21 08:52:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:15,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:52:15,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:15,090 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:15,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:15,355 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:15,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115348911] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:15,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:15,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:52:15,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977403830] [2022-07-21 08:52:15,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:15,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:52:15,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:15,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:52:15,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:52:15,363 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 606 out of 766 [2022-07-21 08:52:15,368 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 703 places, 643 transitions, 1535 flow. Second operand has 34 states, 34 states have (on average 608.7941176470588) internal successors, (20699), 34 states have internal predecessors, (20699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:15,369 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:15,369 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 606 of 766 [2022-07-21 08:52:15,369 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:16,136 INFO L129 PetriNetUnfolder]: 0/885 cut-off events. [2022-07-21 08:52:16,137 INFO L130 PetriNetUnfolder]: For 438/438 co-relation queries the response was YES. [2022-07-21 08:52:16,137 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1410 conditions, 885 events. 0/885 cut-off events. For 438/438 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2524 event pairs, 0 based on Foata normal form. 8/893 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-07-21 08:52:16,138 INFO L132 encePairwiseOnDemand]: 760/766 looper letters, 55 selfloop transitions, 45 changer transitions 0/694 dead transitions. [2022-07-21 08:52:16,139 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 747 places, 694 transitions, 2051 flow [2022-07-21 08:52:16,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 08:52:16,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-21 08:52:16,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 27378 transitions. [2022-07-21 08:52:16,150 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7942558746736292 [2022-07-21 08:52:16,150 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 27378 transitions. [2022-07-21 08:52:16,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 27378 transitions. [2022-07-21 08:52:16,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:16,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 27378 transitions. [2022-07-21 08:52:16,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 608.4) internal successors, (27378), 45 states have internal predecessors, (27378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:16,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 766.0) internal successors, (35236), 46 states have internal predecessors, (35236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:16,192 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 766.0) internal successors, (35236), 46 states have internal predecessors, (35236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:16,193 INFO L186 Difference]: Start difference. First operand has 703 places, 643 transitions, 1535 flow. Second operand 45 states and 27378 transitions. [2022-07-21 08:52:16,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 747 places, 694 transitions, 2051 flow [2022-07-21 08:52:16,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 741 places, 694 transitions, 2011 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-21 08:52:16,202 INFO L242 Difference]: Finished difference. Result has 750 places, 668 transitions, 1813 flow [2022-07-21 08:52:16,203 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=1511, PETRI_DIFFERENCE_MINUEND_PLACES=697, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1813, PETRI_PLACES=750, PETRI_TRANSITIONS=668} [2022-07-21 08:52:16,203 INFO L279 CegarLoopForPetriNet]: 679 programPoint places, 71 predicate places. [2022-07-21 08:52:16,203 INFO L495 AbstractCegarLoop]: Abstraction has has 750 places, 668 transitions, 1813 flow [2022-07-21 08:52:16,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 608.7941176470588) internal successors, (20699), 34 states have internal predecessors, (20699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:16,205 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:16,205 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:16,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:16,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:16,412 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:16,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:16,412 INFO L85 PathProgramCache]: Analyzing trace with hash 553526055, now seen corresponding path program 1 times [2022-07-21 08:52:16,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:16,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569368060] [2022-07-21 08:52:16,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:16,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:16,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:16,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:16,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569368060] [2022-07-21 08:52:16,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569368060] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:16,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519157770] [2022-07-21 08:52:16,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:16,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:16,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:16,716 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:16,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-07-21 08:52:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:17,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 08:52:17,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:17,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:17,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:18,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519157770] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:18,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:18,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-21 08:52:18,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474003916] [2022-07-21 08:52:18,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:18,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-21 08:52:18,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:18,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-21 08:52:18,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-21 08:52:18,041 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 606 out of 766 [2022-07-21 08:52:18,052 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 750 places, 668 transitions, 1813 flow. Second operand has 66 states, 66 states have (on average 608.8939393939394) internal successors, (40187), 66 states have internal predecessors, (40187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:18,052 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:18,052 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 606 of 766 [2022-07-21 08:52:18,052 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:19,210 INFO L129 PetriNetUnfolder]: 0/794 cut-off events. [2022-07-21 08:52:19,211 INFO L130 PetriNetUnfolder]: For 1014/1014 co-relation queries the response was YES. [2022-07-21 08:52:19,211 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1347 conditions, 794 events. 0/794 cut-off events. For 1014/1014 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1953 event pairs, 0 based on Foata normal form. 7/801 useless extension candidates. Maximal degree in co-relation 0. Up to 38 conditions per place. [2022-07-21 08:52:19,212 INFO L132 encePairwiseOnDemand]: 761/766 looper letters, 66 selfloop transitions, 64 changer transitions 0/712 dead transitions. [2022-07-21 08:52:19,212 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 802 places, 712 transitions, 2427 flow [2022-07-21 08:52:19,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-21 08:52:19,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-07-21 08:52:19,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 40133 transitions. [2022-07-21 08:52:19,236 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7938325816915895 [2022-07-21 08:52:19,236 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 40133 transitions. [2022-07-21 08:52:19,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 40133 transitions. [2022-07-21 08:52:19,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:19,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 40133 transitions. [2022-07-21 08:52:19,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 608.0757575757576) internal successors, (40133), 66 states have internal predecessors, (40133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:19,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 766.0) internal successors, (51322), 67 states have internal predecessors, (51322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:19,314 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 766.0) internal successors, (51322), 67 states have internal predecessors, (51322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:19,315 INFO L186 Difference]: Start difference. First operand has 750 places, 668 transitions, 1813 flow. Second operand 66 states and 40133 transitions. [2022-07-21 08:52:19,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 802 places, 712 transitions, 2427 flow [2022-07-21 08:52:19,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 769 places, 712 transitions, 2250 flow, removed 16 selfloop flow, removed 33 redundant places. [2022-07-21 08:52:19,324 INFO L242 Difference]: Finished difference. Result has 769 places, 673 transitions, 1911 flow [2022-07-21 08:52:19,324 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=1645, PETRI_DIFFERENCE_MINUEND_PLACES=704, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=1911, PETRI_PLACES=769, PETRI_TRANSITIONS=673} [2022-07-21 08:52:19,325 INFO L279 CegarLoopForPetriNet]: 679 programPoint places, 90 predicate places. [2022-07-21 08:52:19,325 INFO L495 AbstractCegarLoop]: Abstraction has has 769 places, 673 transitions, 1911 flow [2022-07-21 08:52:19,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 608.8939393939394) internal successors, (40187), 66 states have internal predecessors, (40187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:19,329 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:19,329 INFO L200 CegarLoopForPetriNet]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:19,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:19,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-07-21 08:52:19,548 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:19,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:19,549 INFO L85 PathProgramCache]: Analyzing trace with hash -243572998, now seen corresponding path program 1 times [2022-07-21 08:52:19,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:19,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448743737] [2022-07-21 08:52:19,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:19,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:19,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:52:19,611 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:52:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:52:19,664 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:52:19,665 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:52:19,665 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:52:19,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:52:19,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-07-21 08:52:19,665 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 08:52:19,666 WARN L231 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:52:19,666 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2022-07-21 08:52:19,713 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:52:19,716 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 708 places, 799 transitions, 2170 flow [2022-07-21 08:52:20,185 INFO L129 PetriNetUnfolder]: 224/1652 cut-off events. [2022-07-21 08:52:20,186 INFO L130 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2022-07-21 08:52:20,272 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1972 conditions, 1652 events. 224/1652 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6314 event pairs, 0 based on Foata normal form. 0/1382 useless extension candidates. Maximal degree in co-relation 1847. Up to 46 conditions per place. [2022-07-21 08:52:20,272 INFO L82 GeneralOperation]: Start removeDead. Operand has 708 places, 799 transitions, 2170 flow [2022-07-21 08:52:20,307 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 708 places, 799 transitions, 2170 flow [2022-07-21 08:52:20,308 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:52:20,308 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:52:20,308 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:52:20,312 INFO L129 PetriNetUnfolder]: 4/89 cut-off events. [2022-07-21 08:52:20,312 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:52:20,312 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:20,312 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] [2022-07-21 08:52:20,312 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:20,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:20,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1599319449, now seen corresponding path program 1 times [2022-07-21 08:52:20,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:20,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272843762] [2022-07-21 08:52:20,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:20,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:20,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:20,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272843762] [2022-07-21 08:52:20,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272843762] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:52:20,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:52:20,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:52:20,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267971570] [2022-07-21 08:52:20,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:52:20,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:52:20,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:20,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:52:20,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:52:20,331 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 633 out of 799 [2022-07-21 08:52:20,332 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 708 places, 799 transitions, 2170 flow. Second operand has 3 states, 3 states have (on average 634.0) internal successors, (1902), 3 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:20,332 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:20,332 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 633 of 799 [2022-07-21 08:52:20,332 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:20,838 INFO L129 PetriNetUnfolder]: 0/1380 cut-off events. [2022-07-21 08:52:20,838 INFO L130 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2022-07-21 08:52:20,839 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1837 conditions, 1380 events. 0/1380 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5779 event pairs, 0 based on Foata normal form. 8319/9655 useless extension candidates. Maximal degree in co-relation 0. Up to 132 conditions per place. [2022-07-21 08:52:20,841 INFO L132 encePairwiseOnDemand]: 660/799 looper letters, 31 selfloop transitions, 2 changer transitions 12/666 dead transitions. [2022-07-21 08:52:20,841 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 709 places, 666 transitions, 1970 flow [2022-07-21 08:52:20,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:52:20,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:52:20,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2076 transitions. [2022-07-21 08:52:20,843 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8660826032540676 [2022-07-21 08:52:20,843 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2076 transitions. [2022-07-21 08:52:20,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2076 transitions. [2022-07-21 08:52:20,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:20,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2076 transitions. [2022-07-21 08:52:20,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 692.0) internal successors, (2076), 3 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:20,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 799.0) internal successors, (3196), 4 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:20,846 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 799.0) internal successors, (3196), 4 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:20,846 INFO L186 Difference]: Start difference. First operand has 708 places, 799 transitions, 2170 flow. Second operand 3 states and 2076 transitions. [2022-07-21 08:52:20,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 709 places, 666 transitions, 1970 flow [2022-07-21 08:52:20,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 709 places, 666 transitions, 1508 flow, removed 231 selfloop flow, removed 0 redundant places. [2022-07-21 08:52:20,855 INFO L242 Difference]: Finished difference. Result has 710 places, 651 transitions, 1422 flow [2022-07-21 08:52:20,855 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=799, PETRI_DIFFERENCE_MINUEND_FLOW=1434, PETRI_DIFFERENCE_MINUEND_PLACES=707, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=660, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1422, PETRI_PLACES=710, PETRI_TRANSITIONS=651} [2022-07-21 08:52:20,855 INFO L279 CegarLoopForPetriNet]: 708 programPoint places, 2 predicate places. [2022-07-21 08:52:20,855 INFO L495 AbstractCegarLoop]: Abstraction has has 710 places, 651 transitions, 1422 flow [2022-07-21 08:52:20,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 634.0) internal successors, (1902), 3 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:20,856 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:20,856 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:20,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-07-21 08:52:20,856 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:20,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:20,856 INFO L85 PathProgramCache]: Analyzing trace with hash -905363520, now seen corresponding path program 1 times [2022-07-21 08:52:20,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:20,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97345331] [2022-07-21 08:52:20,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:20,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:20,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:20,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:20,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97345331] [2022-07-21 08:52:20,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97345331] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:20,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638514181] [2022-07-21 08:52:20,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:20,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:20,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:20,880 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:20,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-07-21 08:52:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:21,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:52:21,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:21,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:21,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638514181] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:21,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:21,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:52:21,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707315339] [2022-07-21 08:52:21,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:21,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:52:21,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:21,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:52:21,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:52:21,344 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 632 out of 799 [2022-07-21 08:52:21,346 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 710 places, 651 transitions, 1422 flow. Second operand has 10 states, 10 states have (on average 634.3) internal successors, (6343), 10 states have internal predecessors, (6343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:21,346 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:21,346 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 632 of 799 [2022-07-21 08:52:21,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:21,771 INFO L129 PetriNetUnfolder]: 0/1090 cut-off events. [2022-07-21 08:52:21,771 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-07-21 08:52:21,772 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1382 conditions, 1090 events. 0/1090 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3730 event pairs, 0 based on Foata normal form. 2/1092 useless extension candidates. Maximal degree in co-relation 0. Up to 83 conditions per place. [2022-07-21 08:52:21,773 INFO L132 encePairwiseOnDemand]: 793/799 looper letters, 32 selfloop transitions, 9 changer transitions 0/661 dead transitions. [2022-07-21 08:52:21,773 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 706 places, 661 transitions, 1526 flow [2022-07-21 08:52:21,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:52:21,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:52:21,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5731 transitions. [2022-07-21 08:52:21,776 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7969684327631762 [2022-07-21 08:52:21,777 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5731 transitions. [2022-07-21 08:52:21,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5731 transitions. [2022-07-21 08:52:21,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:21,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5731 transitions. [2022-07-21 08:52:21,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 636.7777777777778) internal successors, (5731), 9 states have internal predecessors, (5731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:21,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 799.0) internal successors, (7990), 10 states have internal predecessors, (7990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:21,784 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 799.0) internal successors, (7990), 10 states have internal predecessors, (7990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:21,784 INFO L186 Difference]: Start difference. First operand has 710 places, 651 transitions, 1422 flow. Second operand 9 states and 5731 transitions. [2022-07-21 08:52:21,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 706 places, 661 transitions, 1526 flow [2022-07-21 08:52:21,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 661 transitions, 1524 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:21,790 INFO L242 Difference]: Finished difference. Result has 708 places, 657 transitions, 1470 flow [2022-07-21 08:52:21,791 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=799, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=697, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1470, PETRI_PLACES=708, PETRI_TRANSITIONS=657} [2022-07-21 08:52:21,791 INFO L279 CegarLoopForPetriNet]: 708 programPoint places, 0 predicate places. [2022-07-21 08:52:21,791 INFO L495 AbstractCegarLoop]: Abstraction has has 708 places, 657 transitions, 1470 flow [2022-07-21 08:52:21,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 634.3) internal successors, (6343), 10 states have internal predecessors, (6343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:21,792 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:21,792 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] [2022-07-21 08:52:21,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:21,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-07-21 08:52:21,994 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:21,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:21,994 INFO L85 PathProgramCache]: Analyzing trace with hash 299532469, now seen corresponding path program 1 times [2022-07-21 08:52:21,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:21,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119242552] [2022-07-21 08:52:21,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:21,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:22,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:22,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119242552] [2022-07-21 08:52:22,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119242552] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:22,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013781507] [2022-07-21 08:52:22,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:22,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:22,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:22,047 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:22,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-07-21 08:52:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:22,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:52:22,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:22,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:22,625 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:22,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013781507] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:22,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:22,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:52:22,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259777634] [2022-07-21 08:52:22,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:22,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:52:22,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:22,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:52:22,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:52:22,631 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 632 out of 799 [2022-07-21 08:52:22,634 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 708 places, 657 transitions, 1470 flow. Second operand has 18 states, 18 states have (on average 634.6111111111111) internal successors, (11423), 18 states have internal predecessors, (11423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:22,634 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:22,634 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 632 of 799 [2022-07-21 08:52:22,634 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:23,173 INFO L129 PetriNetUnfolder]: 0/1038 cut-off events. [2022-07-21 08:52:23,174 INFO L130 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2022-07-21 08:52:23,174 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1487 conditions, 1038 events. 0/1038 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3390 event pairs, 0 based on Foata normal form. 4/1042 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2022-07-21 08:52:23,176 INFO L132 encePairwiseOnDemand]: 793/799 looper letters, 40 selfloop transitions, 21 changer transitions 0/681 dead transitions. [2022-07-21 08:52:23,176 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 728 places, 681 transitions, 1700 flow [2022-07-21 08:52:23,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:52:23,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:52:23,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 13337 transitions. [2022-07-21 08:52:23,182 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7948626259014244 [2022-07-21 08:52:23,182 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 13337 transitions. [2022-07-21 08:52:23,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 13337 transitions. [2022-07-21 08:52:23,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:23,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 13337 transitions. [2022-07-21 08:52:23,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 635.0952380952381) internal successors, (13337), 21 states have internal predecessors, (13337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:23,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 799.0) internal successors, (17578), 22 states have internal predecessors, (17578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:23,202 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 799.0) internal successors, (17578), 22 states have internal predecessors, (17578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:23,202 INFO L186 Difference]: Start difference. First operand has 708 places, 657 transitions, 1470 flow. Second operand 21 states and 13337 transitions. [2022-07-21 08:52:23,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 728 places, 681 transitions, 1700 flow [2022-07-21 08:52:23,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 727 places, 681 transitions, 1686 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:23,212 INFO L242 Difference]: Finished difference. Result has 732 places, 670 transitions, 1594 flow [2022-07-21 08:52:23,212 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=799, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=707, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1594, PETRI_PLACES=732, PETRI_TRANSITIONS=670} [2022-07-21 08:52:23,219 INFO L279 CegarLoopForPetriNet]: 708 programPoint places, 24 predicate places. [2022-07-21 08:52:23,220 INFO L495 AbstractCegarLoop]: Abstraction has has 732 places, 670 transitions, 1594 flow [2022-07-21 08:52:23,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 634.6111111111111) internal successors, (11423), 18 states have internal predecessors, (11423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:23,221 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:23,221 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:23,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-07-21 08:52:23,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:23,441 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:23,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:23,441 INFO L85 PathProgramCache]: Analyzing trace with hash 46618795, now seen corresponding path program 1 times [2022-07-21 08:52:23,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:23,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905251316] [2022-07-21 08:52:23,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:23,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:23,537 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:23,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:23,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905251316] [2022-07-21 08:52:23,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905251316] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:23,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052031784] [2022-07-21 08:52:23,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:23,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:23,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:23,539 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:23,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-07-21 08:52:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:23,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:52:23,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:24,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:24,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052031784] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:24,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:24,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:52:24,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864508330] [2022-07-21 08:52:24,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:24,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:52:24,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:24,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:52:24,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:52:24,202 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 632 out of 799 [2022-07-21 08:52:24,208 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 732 places, 670 transitions, 1594 flow. Second operand has 34 states, 34 states have (on average 634.7941176470588) internal successors, (21583), 34 states have internal predecessors, (21583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:24,208 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:24,208 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 632 of 799 [2022-07-21 08:52:24,209 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:25,135 INFO L129 PetriNetUnfolder]: 0/934 cut-off events. [2022-07-21 08:52:25,136 INFO L130 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2022-07-21 08:52:25,136 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1489 conditions, 934 events. 0/934 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2707 event pairs, 0 based on Foata normal form. 8/942 useless extension candidates. Maximal degree in co-relation 0. Up to 41 conditions per place. [2022-07-21 08:52:25,137 INFO L132 encePairwiseOnDemand]: 793/799 looper letters, 56 selfloop transitions, 45 changer transitions 0/721 dead transitions. [2022-07-21 08:52:25,137 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 776 places, 721 transitions, 2112 flow [2022-07-21 08:52:25,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 08:52:25,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-21 08:52:25,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 28549 transitions. [2022-07-21 08:52:25,149 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7940203031567237 [2022-07-21 08:52:25,150 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 28549 transitions. [2022-07-21 08:52:25,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 28549 transitions. [2022-07-21 08:52:25,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:25,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 28549 transitions. [2022-07-21 08:52:25,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 634.4222222222222) internal successors, (28549), 45 states have internal predecessors, (28549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:25,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 799.0) internal successors, (36754), 46 states have internal predecessors, (36754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:25,198 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 799.0) internal successors, (36754), 46 states have internal predecessors, (36754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:25,198 INFO L186 Difference]: Start difference. First operand has 732 places, 670 transitions, 1594 flow. Second operand 45 states and 28549 transitions. [2022-07-21 08:52:25,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 776 places, 721 transitions, 2112 flow [2022-07-21 08:52:25,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 770 places, 721 transitions, 2072 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-21 08:52:25,207 INFO L242 Difference]: Finished difference. Result has 779 places, 695 transitions, 1872 flow [2022-07-21 08:52:25,208 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=799, PETRI_DIFFERENCE_MINUEND_FLOW=1570, PETRI_DIFFERENCE_MINUEND_PLACES=726, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=647, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1872, PETRI_PLACES=779, PETRI_TRANSITIONS=695} [2022-07-21 08:52:25,208 INFO L279 CegarLoopForPetriNet]: 708 programPoint places, 71 predicate places. [2022-07-21 08:52:25,208 INFO L495 AbstractCegarLoop]: Abstraction has has 779 places, 695 transitions, 1872 flow [2022-07-21 08:52:25,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 634.7941176470588) internal successors, (21583), 34 states have internal predecessors, (21583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:25,211 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:25,211 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:25,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:25,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-07-21 08:52:25,430 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:25,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:25,431 INFO L85 PathProgramCache]: Analyzing trace with hash -679425849, now seen corresponding path program 1 times [2022-07-21 08:52:25,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:25,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523330664] [2022-07-21 08:52:25,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:25,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:25,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:25,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523330664] [2022-07-21 08:52:25,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523330664] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:25,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135641537] [2022-07-21 08:52:25,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:25,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:25,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:25,719 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:25,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-07-21 08:52:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:26,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 08:52:26,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:26,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:26,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:27,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135641537] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:27,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:27,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-21 08:52:27,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120878641] [2022-07-21 08:52:27,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:27,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-21 08:52:27,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:27,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-21 08:52:27,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-21 08:52:27,030 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 632 out of 799 [2022-07-21 08:52:27,041 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 779 places, 695 transitions, 1872 flow. Second operand has 66 states, 66 states have (on average 634.8939393939394) internal successors, (41903), 66 states have internal predecessors, (41903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:27,041 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:27,041 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 632 of 799 [2022-07-21 08:52:27,041 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:28,273 INFO L129 PetriNetUnfolder]: 0/830 cut-off events. [2022-07-21 08:52:28,273 INFO L130 PetriNetUnfolder]: For 1135/1135 co-relation queries the response was YES. [2022-07-21 08:52:28,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1410 conditions, 830 events. 0/830 cut-off events. For 1135/1135 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2051 event pairs, 0 based on Foata normal form. 8/838 useless extension candidates. Maximal degree in co-relation 0. Up to 40 conditions per place. [2022-07-21 08:52:28,275 INFO L132 encePairwiseOnDemand]: 794/799 looper letters, 69 selfloop transitions, 67 changer transitions 0/744 dead transitions. [2022-07-21 08:52:28,275 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 834 places, 744 transitions, 2542 flow [2022-07-21 08:52:28,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-21 08:52:28,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-07-21 08:52:28,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 43752 transitions. [2022-07-21 08:52:28,292 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7936006965228275 [2022-07-21 08:52:28,293 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 43752 transitions. [2022-07-21 08:52:28,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 43752 transitions. [2022-07-21 08:52:28,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:28,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 43752 transitions. [2022-07-21 08:52:28,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 634.0869565217391) internal successors, (43752), 69 states have internal predecessors, (43752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:28,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 799.0) internal successors, (55930), 70 states have internal predecessors, (55930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:28,363 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 799.0) internal successors, (55930), 70 states have internal predecessors, (55930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:28,363 INFO L186 Difference]: Start difference. First operand has 779 places, 695 transitions, 1872 flow. Second operand 69 states and 43752 transitions. [2022-07-21 08:52:28,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 834 places, 744 transitions, 2542 flow [2022-07-21 08:52:28,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 801 places, 744 transitions, 2357 flow, removed 17 selfloop flow, removed 33 redundant places. [2022-07-21 08:52:28,374 INFO L242 Difference]: Finished difference. Result has 801 places, 703 transitions, 1999 flow [2022-07-21 08:52:28,375 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=799, PETRI_DIFFERENCE_MINUEND_FLOW=1704, PETRI_DIFFERENCE_MINUEND_PLACES=733, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=1999, PETRI_PLACES=801, PETRI_TRANSITIONS=703} [2022-07-21 08:52:28,375 INFO L279 CegarLoopForPetriNet]: 708 programPoint places, 93 predicate places. [2022-07-21 08:52:28,375 INFO L495 AbstractCegarLoop]: Abstraction has has 801 places, 703 transitions, 1999 flow [2022-07-21 08:52:28,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 634.8939393939394) internal successors, (41903), 66 states have internal predecessors, (41903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:28,379 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:28,379 INFO L200 CegarLoopForPetriNet]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:28,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-07-21 08:52:28,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-07-21 08:52:28,596 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:28,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:28,596 INFO L85 PathProgramCache]: Analyzing trace with hash -153682008, now seen corresponding path program 1 times [2022-07-21 08:52:28,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:28,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108303542] [2022-07-21 08:52:28,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:28,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:52:28,623 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:52:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:52:28,663 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:52:28,663 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:52:28,663 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:52:28,664 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:52:28,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-07-21 08:52:28,664 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 08:52:28,664 WARN L231 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:52:28,664 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2022-07-21 08:52:28,703 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:52:28,706 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 737 places, 832 transitions, 2285 flow [2022-07-21 08:52:29,224 INFO L129 PetriNetUnfolder]: 234/1724 cut-off events. [2022-07-21 08:52:29,225 INFO L130 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2022-07-21 08:52:29,290 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2070 conditions, 1724 events. 234/1724 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6575 event pairs, 0 based on Foata normal form. 0/1442 useless extension candidates. Maximal degree in co-relation 1944. Up to 48 conditions per place. [2022-07-21 08:52:29,291 INFO L82 GeneralOperation]: Start removeDead. Operand has 737 places, 832 transitions, 2285 flow [2022-07-21 08:52:29,318 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 737 places, 832 transitions, 2285 flow [2022-07-21 08:52:29,319 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:52:29,319 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:52:29,319 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:52:29,322 INFO L129 PetriNetUnfolder]: 4/90 cut-off events. [2022-07-21 08:52:29,322 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:52:29,322 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:29,322 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] [2022-07-21 08:52:29,322 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:29,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:29,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1235462759, now seen corresponding path program 1 times [2022-07-21 08:52:29,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:29,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559930496] [2022-07-21 08:52:29,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:29,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:29,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:29,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:29,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:29,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559930496] [2022-07-21 08:52:29,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559930496] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:52:29,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:52:29,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:52:29,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707115052] [2022-07-21 08:52:29,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:52:29,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:52:29,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:29,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:52:29,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:52:29,340 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 659 out of 832 [2022-07-21 08:52:29,341 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 832 transitions, 2285 flow. Second operand has 3 states, 3 states have (on average 660.0) internal successors, (1980), 3 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:29,341 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:29,341 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 659 of 832 [2022-07-21 08:52:29,341 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:29,902 INFO L129 PetriNetUnfolder]: 0/1441 cut-off events. [2022-07-21 08:52:29,902 INFO L130 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2022-07-21 08:52:29,903 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1930 conditions, 1441 events. 0/1441 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6055 event pairs, 0 based on Foata normal form. 9109/10504 useless extension candidates. Maximal degree in co-relation 0. Up to 138 conditions per place. [2022-07-21 08:52:29,905 INFO L132 encePairwiseOnDemand]: 687/832 looper letters, 32 selfloop transitions, 2 changer transitions 12/693 dead transitions. [2022-07-21 08:52:29,906 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 738 places, 693 transitions, 2075 flow [2022-07-21 08:52:29,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:52:29,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:52:29,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2161 transitions. [2022-07-21 08:52:29,907 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8657852564102564 [2022-07-21 08:52:29,908 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2161 transitions. [2022-07-21 08:52:29,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2161 transitions. [2022-07-21 08:52:29,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:29,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2161 transitions. [2022-07-21 08:52:29,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 720.3333333333334) internal successors, (2161), 3 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:29,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:29,911 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:29,911 INFO L186 Difference]: Start difference. First operand has 737 places, 832 transitions, 2285 flow. Second operand 3 states and 2161 transitions. [2022-07-21 08:52:29,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 738 places, 693 transitions, 2075 flow [2022-07-21 08:52:29,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 738 places, 693 transitions, 1569 flow, removed 253 selfloop flow, removed 0 redundant places. [2022-07-21 08:52:29,920 INFO L242 Difference]: Finished difference. Result has 739 places, 678 transitions, 1481 flow [2022-07-21 08:52:29,921 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=1493, PETRI_DIFFERENCE_MINUEND_PLACES=736, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1481, PETRI_PLACES=739, PETRI_TRANSITIONS=678} [2022-07-21 08:52:29,921 INFO L279 CegarLoopForPetriNet]: 737 programPoint places, 2 predicate places. [2022-07-21 08:52:29,922 INFO L495 AbstractCegarLoop]: Abstraction has has 739 places, 678 transitions, 1481 flow [2022-07-21 08:52:29,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 660.0) internal successors, (1980), 3 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:29,922 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:29,922 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:29,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-07-21 08:52:29,922 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:29,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:29,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1295833056, now seen corresponding path program 1 times [2022-07-21 08:52:29,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:29,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010999330] [2022-07-21 08:52:29,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:29,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:29,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:29,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:29,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010999330] [2022-07-21 08:52:29,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010999330] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:29,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109936264] [2022-07-21 08:52:29,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:29,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:29,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:29,948 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:29,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-07-21 08:52:30,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:30,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:52:30,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:30,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:30,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:30,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109936264] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:30,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:30,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:52:30,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656479792] [2022-07-21 08:52:30,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:30,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:52:30,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:30,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:52:30,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:52:30,452 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 658 out of 832 [2022-07-21 08:52:30,454 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 739 places, 678 transitions, 1481 flow. Second operand has 10 states, 10 states have (on average 660.3) internal successors, (6603), 10 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:30,454 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:30,454 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 658 of 832 [2022-07-21 08:52:30,454 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:30,998 INFO L129 PetriNetUnfolder]: 0/1139 cut-off events. [2022-07-21 08:52:30,998 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-07-21 08:52:30,999 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1444 conditions, 1139 events. 0/1139 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3924 event pairs, 0 based on Foata normal form. 2/1141 useless extension candidates. Maximal degree in co-relation 0. Up to 87 conditions per place. [2022-07-21 08:52:31,001 INFO L132 encePairwiseOnDemand]: 826/832 looper letters, 33 selfloop transitions, 9 changer transitions 0/688 dead transitions. [2022-07-21 08:52:31,001 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 735 places, 688 transitions, 1587 flow [2022-07-21 08:52:31,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:52:31,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:52:31,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5966 transitions. [2022-07-21 08:52:31,004 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7967414529914529 [2022-07-21 08:52:31,004 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5966 transitions. [2022-07-21 08:52:31,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5966 transitions. [2022-07-21 08:52:31,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:31,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5966 transitions. [2022-07-21 08:52:31,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 662.8888888888889) internal successors, (5966), 9 states have internal predecessors, (5966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:31,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 832.0) internal successors, (8320), 10 states have internal predecessors, (8320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:31,012 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 832.0) internal successors, (8320), 10 states have internal predecessors, (8320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:31,012 INFO L186 Difference]: Start difference. First operand has 739 places, 678 transitions, 1481 flow. Second operand 9 states and 5966 transitions. [2022-07-21 08:52:31,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 735 places, 688 transitions, 1587 flow [2022-07-21 08:52:31,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 734 places, 688 transitions, 1585 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:31,019 INFO L242 Difference]: Finished difference. Result has 737 places, 684 transitions, 1529 flow [2022-07-21 08:52:31,020 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=1479, PETRI_DIFFERENCE_MINUEND_PLACES=726, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=672, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1529, PETRI_PLACES=737, PETRI_TRANSITIONS=684} [2022-07-21 08:52:31,020 INFO L279 CegarLoopForPetriNet]: 737 programPoint places, 0 predicate places. [2022-07-21 08:52:31,020 INFO L495 AbstractCegarLoop]: Abstraction has has 737 places, 684 transitions, 1529 flow [2022-07-21 08:52:31,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 660.3) internal successors, (6603), 10 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:31,021 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:31,021 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] [2022-07-21 08:52:31,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-07-21 08:52:31,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-07-21 08:52:31,241 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:31,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:31,241 INFO L85 PathProgramCache]: Analyzing trace with hash -766795499, now seen corresponding path program 1 times [2022-07-21 08:52:31,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:31,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225186525] [2022-07-21 08:52:31,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:31,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:31,283 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:31,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:31,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225186525] [2022-07-21 08:52:31,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225186525] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:31,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171531089] [2022-07-21 08:52:31,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:31,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:31,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:31,285 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:31,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-07-21 08:52:31,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:31,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:52:31,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:31,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:31,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171531089] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:31,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:31,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:52:31,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783509490] [2022-07-21 08:52:31,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:31,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:52:31,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:31,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:52:31,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:52:31,871 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 658 out of 832 [2022-07-21 08:52:31,874 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 684 transitions, 1529 flow. Second operand has 18 states, 18 states have (on average 660.6111111111111) internal successors, (11891), 18 states have internal predecessors, (11891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:31,874 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:31,874 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 658 of 832 [2022-07-21 08:52:31,875 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:32,410 INFO L129 PetriNetUnfolder]: 0/1087 cut-off events. [2022-07-21 08:52:32,411 INFO L130 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2022-07-21 08:52:32,411 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1557 conditions, 1087 events. 0/1087 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3570 event pairs, 0 based on Foata normal form. 4/1091 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2022-07-21 08:52:32,413 INFO L132 encePairwiseOnDemand]: 826/832 looper letters, 41 selfloop transitions, 21 changer transitions 0/708 dead transitions. [2022-07-21 08:52:32,413 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 757 places, 708 transitions, 1761 flow [2022-07-21 08:52:32,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:52:32,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:52:32,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 13884 transitions. [2022-07-21 08:52:32,420 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7946428571428571 [2022-07-21 08:52:32,420 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 13884 transitions. [2022-07-21 08:52:32,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 13884 transitions. [2022-07-21 08:52:32,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:32,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 13884 transitions. [2022-07-21 08:52:32,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 661.1428571428571) internal successors, (13884), 21 states have internal predecessors, (13884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:32,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 832.0) internal successors, (18304), 22 states have internal predecessors, (18304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:32,440 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 832.0) internal successors, (18304), 22 states have internal predecessors, (18304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:32,440 INFO L186 Difference]: Start difference. First operand has 737 places, 684 transitions, 1529 flow. Second operand 21 states and 13884 transitions. [2022-07-21 08:52:32,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 757 places, 708 transitions, 1761 flow [2022-07-21 08:52:32,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 756 places, 708 transitions, 1747 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:32,449 INFO L242 Difference]: Finished difference. Result has 761 places, 697 transitions, 1653 flow [2022-07-21 08:52:32,450 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=1523, PETRI_DIFFERENCE_MINUEND_PLACES=736, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=673, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1653, PETRI_PLACES=761, PETRI_TRANSITIONS=697} [2022-07-21 08:52:32,450 INFO L279 CegarLoopForPetriNet]: 737 programPoint places, 24 predicate places. [2022-07-21 08:52:32,450 INFO L495 AbstractCegarLoop]: Abstraction has has 761 places, 697 transitions, 1653 flow [2022-07-21 08:52:32,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 660.6111111111111) internal successors, (11891), 18 states have internal predecessors, (11891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:32,451 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:32,451 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:32,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-07-21 08:52:32,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:32,667 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:32,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:32,667 INFO L85 PathProgramCache]: Analyzing trace with hash 599763339, now seen corresponding path program 1 times [2022-07-21 08:52:32,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:32,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840633714] [2022-07-21 08:52:32,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:32,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:32,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:32,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840633714] [2022-07-21 08:52:32,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840633714] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:32,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335415874] [2022-07-21 08:52:32,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:32,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:32,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:32,773 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:32,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-07-21 08:52:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:33,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:52:33,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:33,405 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:33,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:33,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335415874] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:33,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:33,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:52:33,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858415530] [2022-07-21 08:52:33,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:33,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:52:33,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:33,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:52:33,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:52:33,652 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 658 out of 832 [2022-07-21 08:52:33,658 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 761 places, 697 transitions, 1653 flow. Second operand has 34 states, 34 states have (on average 660.7941176470588) internal successors, (22467), 34 states have internal predecessors, (22467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:33,658 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:33,658 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 658 of 832 [2022-07-21 08:52:33,658 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:34,514 INFO L129 PetriNetUnfolder]: 0/983 cut-off events. [2022-07-21 08:52:34,514 INFO L130 PetriNetUnfolder]: For 492/492 co-relation queries the response was YES. [2022-07-21 08:52:34,514 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1568 conditions, 983 events. 0/983 cut-off events. For 492/492 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2895 event pairs, 0 based on Foata normal form. 8/991 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-07-21 08:52:34,516 INFO L132 encePairwiseOnDemand]: 826/832 looper letters, 57 selfloop transitions, 45 changer transitions 0/748 dead transitions. [2022-07-21 08:52:34,516 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 805 places, 748 transitions, 2173 flow [2022-07-21 08:52:34,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 08:52:34,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-21 08:52:34,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 29720 transitions. [2022-07-21 08:52:34,529 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7938034188034188 [2022-07-21 08:52:34,529 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 29720 transitions. [2022-07-21 08:52:34,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 29720 transitions. [2022-07-21 08:52:34,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:34,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 29720 transitions. [2022-07-21 08:52:34,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 660.4444444444445) internal successors, (29720), 45 states have internal predecessors, (29720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:34,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 832.0) internal successors, (38272), 46 states have internal predecessors, (38272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:34,574 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 832.0) internal successors, (38272), 46 states have internal predecessors, (38272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:34,575 INFO L186 Difference]: Start difference. First operand has 761 places, 697 transitions, 1653 flow. Second operand 45 states and 29720 transitions. [2022-07-21 08:52:34,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 805 places, 748 transitions, 2173 flow [2022-07-21 08:52:34,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 799 places, 748 transitions, 2133 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-21 08:52:34,585 INFO L242 Difference]: Finished difference. Result has 808 places, 722 transitions, 1931 flow [2022-07-21 08:52:34,585 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=1629, PETRI_DIFFERENCE_MINUEND_PLACES=755, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1931, PETRI_PLACES=808, PETRI_TRANSITIONS=722} [2022-07-21 08:52:34,586 INFO L279 CegarLoopForPetriNet]: 737 programPoint places, 71 predicate places. [2022-07-21 08:52:34,586 INFO L495 AbstractCegarLoop]: Abstraction has has 808 places, 722 transitions, 1931 flow [2022-07-21 08:52:34,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 660.7941176470588) internal successors, (22467), 34 states have internal predecessors, (22467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:34,588 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:34,588 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:34,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:34,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2022-07-21 08:52:34,803 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:34,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:34,804 INFO L85 PathProgramCache]: Analyzing trace with hash 360184487, now seen corresponding path program 1 times [2022-07-21 08:52:34,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:34,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300406216] [2022-07-21 08:52:34,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:34,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:35,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:35,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300406216] [2022-07-21 08:52:35,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300406216] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:35,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193022069] [2022-07-21 08:52:35,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:35,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:35,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:35,106 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:35,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-07-21 08:52:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:35,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 08:52:35,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:35,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:36,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193022069] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:36,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:36,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-21 08:52:36,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826013474] [2022-07-21 08:52:36,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:36,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-21 08:52:36,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:36,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-21 08:52:36,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-21 08:52:36,390 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 658 out of 832 [2022-07-21 08:52:36,401 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 808 places, 722 transitions, 1931 flow. Second operand has 66 states, 66 states have (on average 660.8939393939394) internal successors, (43619), 66 states have internal predecessors, (43619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:36,402 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:36,402 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 658 of 832 [2022-07-21 08:52:36,402 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:37,343 INFO L129 PetriNetUnfolder]: 0/866 cut-off events. [2022-07-21 08:52:37,344 INFO L130 PetriNetUnfolder]: For 1256/1256 co-relation queries the response was YES. [2022-07-21 08:52:37,344 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 866 events. 0/866 cut-off events. For 1256/1256 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2149 event pairs, 0 based on Foata normal form. 9/875 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-07-21 08:52:37,346 INFO L132 encePairwiseOnDemand]: 827/832 looper letters, 72 selfloop transitions, 70 changer transitions 0/776 dead transitions. [2022-07-21 08:52:37,346 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 866 places, 776 transitions, 2657 flow [2022-07-21 08:52:37,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-21 08:52:37,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-07-21 08:52:37,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 47527 transitions. [2022-07-21 08:52:37,370 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7933860844017094 [2022-07-21 08:52:37,370 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 47527 transitions. [2022-07-21 08:52:37,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 47527 transitions. [2022-07-21 08:52:37,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:37,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 47527 transitions. [2022-07-21 08:52:37,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 660.0972222222222) internal successors, (47527), 72 states have internal predecessors, (47527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:37,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 832.0) internal successors, (60736), 73 states have internal predecessors, (60736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:37,446 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 832.0) internal successors, (60736), 73 states have internal predecessors, (60736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:37,446 INFO L186 Difference]: Start difference. First operand has 808 places, 722 transitions, 1931 flow. Second operand 72 states and 47527 transitions. [2022-07-21 08:52:37,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 866 places, 776 transitions, 2657 flow [2022-07-21 08:52:37,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 833 places, 776 transitions, 2464 flow, removed 18 selfloop flow, removed 33 redundant places. [2022-07-21 08:52:37,457 INFO L242 Difference]: Finished difference. Result has 833 places, 733 transitions, 2087 flow [2022-07-21 08:52:37,458 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=1763, PETRI_DIFFERENCE_MINUEND_PLACES=762, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=2087, PETRI_PLACES=833, PETRI_TRANSITIONS=733} [2022-07-21 08:52:37,458 INFO L279 CegarLoopForPetriNet]: 737 programPoint places, 96 predicate places. [2022-07-21 08:52:37,458 INFO L495 AbstractCegarLoop]: Abstraction has has 833 places, 733 transitions, 2087 flow [2022-07-21 08:52:37,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 660.8939393939394) internal successors, (43619), 66 states have internal predecessors, (43619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:37,462 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:37,462 INFO L200 CegarLoopForPetriNet]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:37,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:37,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:37,676 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:37,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:37,677 INFO L85 PathProgramCache]: Analyzing trace with hash -134735529, now seen corresponding path program 1 times [2022-07-21 08:52:37,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:37,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758815934] [2022-07-21 08:52:37,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:37,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:37,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:52:37,718 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:52:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:52:37,761 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:52:37,761 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:52:37,761 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:52:37,762 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:52:37,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-07-21 08:52:37,762 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 08:52:37,762 WARN L231 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:52:37,762 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2022-07-21 08:52:37,810 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:52:37,814 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 766 places, 865 transitions, 2402 flow [2022-07-21 08:52:38,323 INFO L129 PetriNetUnfolder]: 244/1796 cut-off events. [2022-07-21 08:52:38,324 INFO L130 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2022-07-21 08:52:38,433 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2169 conditions, 1796 events. 244/1796 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6875 event pairs, 0 based on Foata normal form. 0/1502 useless extension candidates. Maximal degree in co-relation 2042. Up to 50 conditions per place. [2022-07-21 08:52:38,434 INFO L82 GeneralOperation]: Start removeDead. Operand has 766 places, 865 transitions, 2402 flow [2022-07-21 08:52:38,478 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 766 places, 865 transitions, 2402 flow [2022-07-21 08:52:38,479 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:52:38,479 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:52:38,479 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:52:38,484 INFO L129 PetriNetUnfolder]: 5/92 cut-off events. [2022-07-21 08:52:38,485 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:52:38,485 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:38,485 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] [2022-07-21 08:52:38,485 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:38,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:38,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1513814343, now seen corresponding path program 1 times [2022-07-21 08:52:38,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:38,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652621053] [2022-07-21 08:52:38,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:38,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:38,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:38,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:38,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:38,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652621053] [2022-07-21 08:52:38,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652621053] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:52:38,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:52:38,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:52:38,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240149743] [2022-07-21 08:52:38,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:52:38,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:52:38,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:38,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:52:38,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:52:38,506 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 685 out of 865 [2022-07-21 08:52:38,507 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 766 places, 865 transitions, 2402 flow. Second operand has 3 states, 3 states have (on average 686.0) internal successors, (2058), 3 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:38,507 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:38,507 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 685 of 865 [2022-07-21 08:52:38,507 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:39,114 INFO L129 PetriNetUnfolder]: 0/1502 cut-off events. [2022-07-21 08:52:39,115 INFO L130 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2022-07-21 08:52:39,115 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2024 conditions, 1502 events. 0/1502 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6276 event pairs, 0 based on Foata normal form. 9937/11391 useless extension candidates. Maximal degree in co-relation 0. Up to 144 conditions per place. [2022-07-21 08:52:39,117 INFO L132 encePairwiseOnDemand]: 714/865 looper letters, 33 selfloop transitions, 2 changer transitions 12/720 dead transitions. [2022-07-21 08:52:39,117 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 767 places, 720 transitions, 2182 flow [2022-07-21 08:52:39,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:52:39,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:52:39,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2246 transitions. [2022-07-21 08:52:39,119 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8655105973025048 [2022-07-21 08:52:39,119 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2246 transitions. [2022-07-21 08:52:39,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2246 transitions. [2022-07-21 08:52:39,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:39,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2246 transitions. [2022-07-21 08:52:39,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 748.6666666666666) internal successors, (2246), 3 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:39,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 865.0) internal successors, (3460), 4 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:39,123 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 865.0) internal successors, (3460), 4 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:39,123 INFO L186 Difference]: Start difference. First operand has 766 places, 865 transitions, 2402 flow. Second operand 3 states and 2246 transitions. [2022-07-21 08:52:39,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 767 places, 720 transitions, 2182 flow [2022-07-21 08:52:39,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 767 places, 720 transitions, 1630 flow, removed 276 selfloop flow, removed 0 redundant places. [2022-07-21 08:52:39,132 INFO L242 Difference]: Finished difference. Result has 768 places, 705 transitions, 1540 flow [2022-07-21 08:52:39,133 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=865, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=765, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=714, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1540, PETRI_PLACES=768, PETRI_TRANSITIONS=705} [2022-07-21 08:52:39,133 INFO L279 CegarLoopForPetriNet]: 766 programPoint places, 2 predicate places. [2022-07-21 08:52:39,133 INFO L495 AbstractCegarLoop]: Abstraction has has 768 places, 705 transitions, 1540 flow [2022-07-21 08:52:39,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 686.0) internal successors, (2058), 3 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:39,133 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:39,133 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:39,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-07-21 08:52:39,134 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:39,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:39,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1822420096, now seen corresponding path program 1 times [2022-07-21 08:52:39,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:39,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397050012] [2022-07-21 08:52:39,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:39,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:39,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:39,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:39,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:39,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397050012] [2022-07-21 08:52:39,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397050012] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:39,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726298919] [2022-07-21 08:52:39,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:39,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:39,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:39,160 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:39,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-07-21 08:52:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:39,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:52:39,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:39,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:39,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726298919] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:39,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:39,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:52:39,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39179548] [2022-07-21 08:52:39,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:39,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:52:39,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:39,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:52:39,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:52:39,706 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 684 out of 865 [2022-07-21 08:52:39,708 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 768 places, 705 transitions, 1540 flow. Second operand has 10 states, 10 states have (on average 686.3) internal successors, (6863), 10 states have internal predecessors, (6863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:39,708 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:39,708 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 684 of 865 [2022-07-21 08:52:39,708 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:40,229 INFO L129 PetriNetUnfolder]: 0/1188 cut-off events. [2022-07-21 08:52:40,229 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-21 08:52:40,230 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1506 conditions, 1188 events. 0/1188 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4105 event pairs, 0 based on Foata normal form. 2/1190 useless extension candidates. Maximal degree in co-relation 0. Up to 91 conditions per place. [2022-07-21 08:52:40,232 INFO L132 encePairwiseOnDemand]: 859/865 looper letters, 34 selfloop transitions, 9 changer transitions 0/715 dead transitions. [2022-07-21 08:52:40,232 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 764 places, 715 transitions, 1648 flow [2022-07-21 08:52:40,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:52:40,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:52:40,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6201 transitions. [2022-07-21 08:52:40,235 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7965317919075144 [2022-07-21 08:52:40,235 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6201 transitions. [2022-07-21 08:52:40,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6201 transitions. [2022-07-21 08:52:40,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:40,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6201 transitions. [2022-07-21 08:52:40,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 689.0) internal successors, (6201), 9 states have internal predecessors, (6201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:40,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 865.0) internal successors, (8650), 10 states have internal predecessors, (8650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:40,244 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 865.0) internal successors, (8650), 10 states have internal predecessors, (8650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:40,244 INFO L186 Difference]: Start difference. First operand has 768 places, 705 transitions, 1540 flow. Second operand 9 states and 6201 transitions. [2022-07-21 08:52:40,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 764 places, 715 transitions, 1648 flow [2022-07-21 08:52:40,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 763 places, 715 transitions, 1646 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:40,253 INFO L242 Difference]: Finished difference. Result has 766 places, 711 transitions, 1588 flow [2022-07-21 08:52:40,256 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=865, PETRI_DIFFERENCE_MINUEND_FLOW=1538, PETRI_DIFFERENCE_MINUEND_PLACES=755, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1588, PETRI_PLACES=766, PETRI_TRANSITIONS=711} [2022-07-21 08:52:40,256 INFO L279 CegarLoopForPetriNet]: 766 programPoint places, 0 predicate places. [2022-07-21 08:52:40,256 INFO L495 AbstractCegarLoop]: Abstraction has has 766 places, 711 transitions, 1588 flow [2022-07-21 08:52:40,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 686.3) internal successors, (6863), 10 states have internal predecessors, (6863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:40,257 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:40,257 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] [2022-07-21 08:52:40,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-07-21 08:52:40,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-07-21 08:52:40,477 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:40,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:40,477 INFO L85 PathProgramCache]: Analyzing trace with hash 329246261, now seen corresponding path program 1 times [2022-07-21 08:52:40,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:40,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538948535] [2022-07-21 08:52:40,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:40,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:40,519 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:40,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:40,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538948535] [2022-07-21 08:52:40,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538948535] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:40,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984501668] [2022-07-21 08:52:40,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:40,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:40,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:40,522 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:40,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-07-21 08:52:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:40,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:52:40,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:40,925 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:40,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:41,000 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:41,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984501668] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:41,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:41,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:52:41,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132596388] [2022-07-21 08:52:41,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:41,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:52:41,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:41,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:52:41,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:52:41,006 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 684 out of 865 [2022-07-21 08:52:41,010 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 766 places, 711 transitions, 1588 flow. Second operand has 18 states, 18 states have (on average 686.6111111111111) internal successors, (12359), 18 states have internal predecessors, (12359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:41,010 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:41,010 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 684 of 865 [2022-07-21 08:52:41,010 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:41,671 INFO L129 PetriNetUnfolder]: 0/1136 cut-off events. [2022-07-21 08:52:41,672 INFO L130 PetriNetUnfolder]: For 138/138 co-relation queries the response was YES. [2022-07-21 08:52:41,672 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1627 conditions, 1136 events. 0/1136 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3761 event pairs, 0 based on Foata normal form. 4/1140 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2022-07-21 08:52:41,674 INFO L132 encePairwiseOnDemand]: 859/865 looper letters, 42 selfloop transitions, 21 changer transitions 0/735 dead transitions. [2022-07-21 08:52:41,674 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 786 places, 735 transitions, 1822 flow [2022-07-21 08:52:41,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:52:41,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:52:41,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 14431 transitions. [2022-07-21 08:52:41,680 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7944398568676025 [2022-07-21 08:52:41,680 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 14431 transitions. [2022-07-21 08:52:41,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 14431 transitions. [2022-07-21 08:52:41,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:41,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 14431 transitions. [2022-07-21 08:52:41,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 687.1904761904761) internal successors, (14431), 21 states have internal predecessors, (14431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:41,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 865.0) internal successors, (19030), 22 states have internal predecessors, (19030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:41,702 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 865.0) internal successors, (19030), 22 states have internal predecessors, (19030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:41,702 INFO L186 Difference]: Start difference. First operand has 766 places, 711 transitions, 1588 flow. Second operand 21 states and 14431 transitions. [2022-07-21 08:52:41,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 786 places, 735 transitions, 1822 flow [2022-07-21 08:52:41,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 785 places, 735 transitions, 1808 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:41,711 INFO L242 Difference]: Finished difference. Result has 790 places, 724 transitions, 1712 flow [2022-07-21 08:52:41,712 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=865, PETRI_DIFFERENCE_MINUEND_FLOW=1582, PETRI_DIFFERENCE_MINUEND_PLACES=765, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1712, PETRI_PLACES=790, PETRI_TRANSITIONS=724} [2022-07-21 08:52:41,712 INFO L279 CegarLoopForPetriNet]: 766 programPoint places, 24 predicate places. [2022-07-21 08:52:41,712 INFO L495 AbstractCegarLoop]: Abstraction has has 790 places, 724 transitions, 1712 flow [2022-07-21 08:52:41,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 686.6111111111111) internal successors, (12359), 18 states have internal predecessors, (12359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:41,713 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:41,713 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:41,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:41,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-07-21 08:52:41,933 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:41,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:41,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1297432149, now seen corresponding path program 1 times [2022-07-21 08:52:41,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:41,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967092445] [2022-07-21 08:52:41,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:41,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:41,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:42,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:42,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967092445] [2022-07-21 08:52:42,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967092445] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:42,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177585834] [2022-07-21 08:52:42,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:42,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:42,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:42,042 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:42,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-07-21 08:52:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:42,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:52:42,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:42,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:42,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177585834] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:42,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:42,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:52:42,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741759822] [2022-07-21 08:52:42,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:42,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:52:42,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:42,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:52:42,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:52:42,900 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 684 out of 865 [2022-07-21 08:52:42,907 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 790 places, 724 transitions, 1712 flow. Second operand has 34 states, 34 states have (on average 686.7941176470588) internal successors, (23351), 34 states have internal predecessors, (23351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:42,907 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:42,907 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 684 of 865 [2022-07-21 08:52:42,907 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:43,862 INFO L129 PetriNetUnfolder]: 0/1032 cut-off events. [2022-07-21 08:52:43,862 INFO L130 PetriNetUnfolder]: For 519/519 co-relation queries the response was YES. [2022-07-21 08:52:43,862 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1647 conditions, 1032 events. 0/1032 cut-off events. For 519/519 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3077 event pairs, 0 based on Foata normal form. 8/1040 useless extension candidates. Maximal degree in co-relation 0. Up to 45 conditions per place. [2022-07-21 08:52:43,864 INFO L132 encePairwiseOnDemand]: 859/865 looper letters, 58 selfloop transitions, 45 changer transitions 0/775 dead transitions. [2022-07-21 08:52:43,865 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 834 places, 775 transitions, 2234 flow [2022-07-21 08:52:43,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 08:52:43,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-21 08:52:43,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 30891 transitions. [2022-07-21 08:52:43,878 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7936030828516377 [2022-07-21 08:52:43,878 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 30891 transitions. [2022-07-21 08:52:43,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 30891 transitions. [2022-07-21 08:52:43,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:43,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 30891 transitions. [2022-07-21 08:52:43,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 686.4666666666667) internal successors, (30891), 45 states have internal predecessors, (30891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:43,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 865.0) internal successors, (39790), 46 states have internal predecessors, (39790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:43,933 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 865.0) internal successors, (39790), 46 states have internal predecessors, (39790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:43,933 INFO L186 Difference]: Start difference. First operand has 790 places, 724 transitions, 1712 flow. Second operand 45 states and 30891 transitions. [2022-07-21 08:52:43,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 834 places, 775 transitions, 2234 flow [2022-07-21 08:52:43,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 828 places, 775 transitions, 2194 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-21 08:52:43,945 INFO L242 Difference]: Finished difference. Result has 837 places, 749 transitions, 1990 flow [2022-07-21 08:52:43,946 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=865, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=784, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=701, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1990, PETRI_PLACES=837, PETRI_TRANSITIONS=749} [2022-07-21 08:52:43,946 INFO L279 CegarLoopForPetriNet]: 766 programPoint places, 71 predicate places. [2022-07-21 08:52:43,947 INFO L495 AbstractCegarLoop]: Abstraction has has 837 places, 749 transitions, 1990 flow [2022-07-21 08:52:43,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 686.7941176470588) internal successors, (23351), 34 states have internal predecessors, (23351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:43,949 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:43,949 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:43,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:44,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:44,171 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:44,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:44,172 INFO L85 PathProgramCache]: Analyzing trace with hash -622610233, now seen corresponding path program 1 times [2022-07-21 08:52:44,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:44,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971013330] [2022-07-21 08:52:44,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:44,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:44,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:44,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971013330] [2022-07-21 08:52:44,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971013330] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:44,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555960454] [2022-07-21 08:52:44,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:44,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:44,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:44,500 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:44,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-07-21 08:52:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:45,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 08:52:45,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:45,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:45,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555960454] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:45,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:45,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-21 08:52:45,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190011557] [2022-07-21 08:52:45,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:45,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-21 08:52:45,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:45,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-21 08:52:45,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-21 08:52:45,960 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 684 out of 865 [2022-07-21 08:52:46,006 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 837 places, 749 transitions, 1990 flow. Second operand has 66 states, 66 states have (on average 686.8939393939394) internal successors, (45335), 66 states have internal predecessors, (45335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:46,008 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:46,008 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 684 of 865 [2022-07-21 08:52:46,008 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:47,355 INFO L129 PetriNetUnfolder]: 0/902 cut-off events. [2022-07-21 08:52:47,355 INFO L130 PetriNetUnfolder]: For 1377/1377 co-relation queries the response was YES. [2022-07-21 08:52:47,355 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1536 conditions, 902 events. 0/902 cut-off events. For 1377/1377 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2247 event pairs, 0 based on Foata normal form. 10/912 useless extension candidates. Maximal degree in co-relation 0. Up to 44 conditions per place. [2022-07-21 08:52:47,357 INFO L132 encePairwiseOnDemand]: 860/865 looper letters, 75 selfloop transitions, 73 changer transitions 0/808 dead transitions. [2022-07-21 08:52:47,357 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 898 places, 808 transitions, 2772 flow [2022-07-21 08:52:47,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-07-21 08:52:47,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-07-21 08:52:47,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 51458 transitions. [2022-07-21 08:52:47,379 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7931868978805395 [2022-07-21 08:52:47,380 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 51458 transitions. [2022-07-21 08:52:47,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 51458 transitions. [2022-07-21 08:52:47,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:47,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 51458 transitions. [2022-07-21 08:52:47,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 686.1066666666667) internal successors, (51458), 75 states have internal predecessors, (51458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:47,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 865.0) internal successors, (65740), 76 states have internal predecessors, (65740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:47,468 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 865.0) internal successors, (65740), 76 states have internal predecessors, (65740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:47,468 INFO L186 Difference]: Start difference. First operand has 837 places, 749 transitions, 1990 flow. Second operand 75 states and 51458 transitions. [2022-07-21 08:52:47,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 898 places, 808 transitions, 2772 flow [2022-07-21 08:52:47,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 865 places, 808 transitions, 2571 flow, removed 19 selfloop flow, removed 33 redundant places. [2022-07-21 08:52:47,480 INFO L242 Difference]: Finished difference. Result has 865 places, 763 transitions, 2175 flow [2022-07-21 08:52:47,481 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=865, PETRI_DIFFERENCE_MINUEND_FLOW=1822, PETRI_DIFFERENCE_MINUEND_PLACES=791, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=2175, PETRI_PLACES=865, PETRI_TRANSITIONS=763} [2022-07-21 08:52:47,481 INFO L279 CegarLoopForPetriNet]: 766 programPoint places, 99 predicate places. [2022-07-21 08:52:47,481 INFO L495 AbstractCegarLoop]: Abstraction has has 865 places, 763 transitions, 2175 flow [2022-07-21 08:52:47,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 686.8939393939394) internal successors, (45335), 66 states have internal predecessors, (45335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:47,486 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:47,486 INFO L200 CegarLoopForPetriNet]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:47,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:47,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:47,708 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:47,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:47,708 INFO L85 PathProgramCache]: Analyzing trace with hash -762434393, now seen corresponding path program 1 times [2022-07-21 08:52:47,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:47,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128735549] [2022-07-21 08:52:47,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:47,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:52:47,745 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:52:47,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:52:47,834 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:52:47,840 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:52:47,840 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:52:47,840 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:52:47,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-07-21 08:52:47,840 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 08:52:47,841 WARN L231 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:52:47,841 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2022-07-21 08:52:47,901 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:52:47,906 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 795 places, 898 transitions, 2521 flow [2022-07-21 08:52:48,466 INFO L129 PetriNetUnfolder]: 254/1868 cut-off events. [2022-07-21 08:52:48,466 INFO L130 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2022-07-21 08:52:48,617 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2269 conditions, 1868 events. 254/1868 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7144 event pairs, 0 based on Foata normal form. 0/1562 useless extension candidates. Maximal degree in co-relation 2141. Up to 52 conditions per place. [2022-07-21 08:52:48,618 INFO L82 GeneralOperation]: Start removeDead. Operand has 795 places, 898 transitions, 2521 flow [2022-07-21 08:52:48,670 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 795 places, 898 transitions, 2521 flow [2022-07-21 08:52:48,670 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:52:48,671 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:52:48,671 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:52:48,674 INFO L129 PetriNetUnfolder]: 4/89 cut-off events. [2022-07-21 08:52:48,675 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:52:48,675 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:48,675 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] [2022-07-21 08:52:48,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:48,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:48,675 INFO L85 PathProgramCache]: Analyzing trace with hash -764264697, now seen corresponding path program 1 times [2022-07-21 08:52:48,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:48,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434766416] [2022-07-21 08:52:48,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:48,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:48,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:48,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434766416] [2022-07-21 08:52:48,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434766416] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:52:48,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:52:48,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:52:48,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073547482] [2022-07-21 08:52:48,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:52:48,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:52:48,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:48,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:52:48,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:52:48,696 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 711 out of 898 [2022-07-21 08:52:48,697 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 795 places, 898 transitions, 2521 flow. Second operand has 3 states, 3 states have (on average 712.0) internal successors, (2136), 3 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:48,697 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:48,697 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 711 of 898 [2022-07-21 08:52:48,697 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:49,345 INFO L129 PetriNetUnfolder]: 0/1563 cut-off events. [2022-07-21 08:52:49,345 INFO L130 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2022-07-21 08:52:49,345 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2119 conditions, 1563 events. 0/1563 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6564 event pairs, 0 based on Foata normal form. 10799/12312 useless extension candidates. Maximal degree in co-relation 0. Up to 150 conditions per place. [2022-07-21 08:52:49,348 INFO L132 encePairwiseOnDemand]: 741/898 looper letters, 34 selfloop transitions, 2 changer transitions 12/747 dead transitions. [2022-07-21 08:52:49,348 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 796 places, 747 transitions, 2291 flow [2022-07-21 08:52:49,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:52:49,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:52:49,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2331 transitions. [2022-07-21 08:52:49,350 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8652561247216035 [2022-07-21 08:52:49,350 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2331 transitions. [2022-07-21 08:52:49,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2331 transitions. [2022-07-21 08:52:49,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:49,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2331 transitions. [2022-07-21 08:52:49,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 777.0) internal successors, (2331), 3 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:49,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 898.0) internal successors, (3592), 4 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:49,353 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 898.0) internal successors, (3592), 4 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:49,353 INFO L186 Difference]: Start difference. First operand has 795 places, 898 transitions, 2521 flow. Second operand 3 states and 2331 transitions. [2022-07-21 08:52:49,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 796 places, 747 transitions, 2291 flow [2022-07-21 08:52:49,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 796 places, 747 transitions, 1691 flow, removed 300 selfloop flow, removed 0 redundant places. [2022-07-21 08:52:49,364 INFO L242 Difference]: Finished difference. Result has 797 places, 732 transitions, 1599 flow [2022-07-21 08:52:49,364 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=898, PETRI_DIFFERENCE_MINUEND_FLOW=1611, PETRI_DIFFERENCE_MINUEND_PLACES=794, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=741, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1599, PETRI_PLACES=797, PETRI_TRANSITIONS=732} [2022-07-21 08:52:49,364 INFO L279 CegarLoopForPetriNet]: 795 programPoint places, 2 predicate places. [2022-07-21 08:52:49,365 INFO L495 AbstractCegarLoop]: Abstraction has has 797 places, 732 transitions, 1599 flow [2022-07-21 08:52:49,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 712.0) internal successors, (2136), 3 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:49,365 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:49,365 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:49,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-07-21 08:52:49,365 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:49,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:49,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1670188384, now seen corresponding path program 1 times [2022-07-21 08:52:49,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:49,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999647711] [2022-07-21 08:52:49,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:49,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:49,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:49,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:49,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:49,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999647711] [2022-07-21 08:52:49,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999647711] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:49,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702559648] [2022-07-21 08:52:49,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:49,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:49,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:49,392 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:49,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-07-21 08:52:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:49,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:52:49,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:49,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:49,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:49,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702559648] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:49,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:49,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:52:49,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596119946] [2022-07-21 08:52:49,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:49,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:52:49,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:49,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:52:49,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:52:49,965 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 710 out of 898 [2022-07-21 08:52:49,966 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 797 places, 732 transitions, 1599 flow. Second operand has 10 states, 10 states have (on average 712.3) internal successors, (7123), 10 states have internal predecessors, (7123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:49,966 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:49,967 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 710 of 898 [2022-07-21 08:52:49,967 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:50,519 INFO L129 PetriNetUnfolder]: 0/1237 cut-off events. [2022-07-21 08:52:50,519 INFO L130 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-07-21 08:52:50,519 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1568 conditions, 1237 events. 0/1237 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4282 event pairs, 0 based on Foata normal form. 2/1239 useless extension candidates. Maximal degree in co-relation 0. Up to 95 conditions per place. [2022-07-21 08:52:50,522 INFO L132 encePairwiseOnDemand]: 892/898 looper letters, 35 selfloop transitions, 9 changer transitions 0/742 dead transitions. [2022-07-21 08:52:50,522 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 793 places, 742 transitions, 1709 flow [2022-07-21 08:52:50,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:52:50,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:52:50,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6436 transitions. [2022-07-21 08:52:50,525 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7963375402128187 [2022-07-21 08:52:50,525 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6436 transitions. [2022-07-21 08:52:50,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6436 transitions. [2022-07-21 08:52:50,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:50,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6436 transitions. [2022-07-21 08:52:50,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 715.1111111111111) internal successors, (6436), 9 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:50,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 898.0) internal successors, (8980), 10 states have internal predecessors, (8980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:50,534 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 898.0) internal successors, (8980), 10 states have internal predecessors, (8980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:50,534 INFO L186 Difference]: Start difference. First operand has 797 places, 732 transitions, 1599 flow. Second operand 9 states and 6436 transitions. [2022-07-21 08:52:50,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 793 places, 742 transitions, 1709 flow [2022-07-21 08:52:50,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 792 places, 742 transitions, 1707 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:50,541 INFO L242 Difference]: Finished difference. Result has 795 places, 738 transitions, 1647 flow [2022-07-21 08:52:50,542 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=898, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=784, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1647, PETRI_PLACES=795, PETRI_TRANSITIONS=738} [2022-07-21 08:52:50,542 INFO L279 CegarLoopForPetriNet]: 795 programPoint places, 0 predicate places. [2022-07-21 08:52:50,542 INFO L495 AbstractCegarLoop]: Abstraction has has 795 places, 738 transitions, 1647 flow [2022-07-21 08:52:50,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 712.3) internal successors, (7123), 10 states have internal predecessors, (7123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:50,543 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:50,543 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] [2022-07-21 08:52:50,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:50,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:50,758 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:50,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:50,758 INFO L85 PathProgramCache]: Analyzing trace with hash -707309547, now seen corresponding path program 1 times [2022-07-21 08:52:50,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:50,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17893377] [2022-07-21 08:52:50,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:50,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:50,798 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:50,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:50,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17893377] [2022-07-21 08:52:50,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17893377] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:50,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558785232] [2022-07-21 08:52:50,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:50,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:50,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:50,800 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:50,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-07-21 08:52:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:51,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:52:51,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:51,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:51,425 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:51,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558785232] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:51,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:51,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:52:51,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306529569] [2022-07-21 08:52:51,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:51,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:52:51,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:51,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:52:51,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:52:51,430 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 710 out of 898 [2022-07-21 08:52:51,434 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 795 places, 738 transitions, 1647 flow. Second operand has 18 states, 18 states have (on average 712.6111111111111) internal successors, (12827), 18 states have internal predecessors, (12827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:51,434 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:51,434 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 710 of 898 [2022-07-21 08:52:51,434 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:52,079 INFO L129 PetriNetUnfolder]: 0/1185 cut-off events. [2022-07-21 08:52:52,079 INFO L130 PetriNetUnfolder]: For 144/144 co-relation queries the response was YES. [2022-07-21 08:52:52,079 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1697 conditions, 1185 events. 0/1185 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3945 event pairs, 0 based on Foata normal form. 4/1189 useless extension candidates. Maximal degree in co-relation 0. Up to 79 conditions per place. [2022-07-21 08:52:52,081 INFO L132 encePairwiseOnDemand]: 892/898 looper letters, 43 selfloop transitions, 21 changer transitions 0/762 dead transitions. [2022-07-21 08:52:52,081 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 815 places, 762 transitions, 1883 flow [2022-07-21 08:52:52,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:52:52,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:52:52,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 14978 transitions. [2022-07-21 08:52:52,088 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7942517764344045 [2022-07-21 08:52:52,088 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 14978 transitions. [2022-07-21 08:52:52,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 14978 transitions. [2022-07-21 08:52:52,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:52,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 14978 transitions. [2022-07-21 08:52:52,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 713.2380952380952) internal successors, (14978), 21 states have internal predecessors, (14978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:52,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 898.0) internal successors, (19756), 22 states have internal predecessors, (19756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:52,108 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 898.0) internal successors, (19756), 22 states have internal predecessors, (19756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:52,108 INFO L186 Difference]: Start difference. First operand has 795 places, 738 transitions, 1647 flow. Second operand 21 states and 14978 transitions. [2022-07-21 08:52:52,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 815 places, 762 transitions, 1883 flow [2022-07-21 08:52:52,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 814 places, 762 transitions, 1869 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:52,117 INFO L242 Difference]: Finished difference. Result has 819 places, 751 transitions, 1771 flow [2022-07-21 08:52:52,117 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=898, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=794, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=727, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1771, PETRI_PLACES=819, PETRI_TRANSITIONS=751} [2022-07-21 08:52:52,117 INFO L279 CegarLoopForPetriNet]: 795 programPoint places, 24 predicate places. [2022-07-21 08:52:52,117 INFO L495 AbstractCegarLoop]: Abstraction has has 819 places, 751 transitions, 1771 flow [2022-07-21 08:52:52,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 712.6111111111111) internal successors, (12827), 18 states have internal predecessors, (12827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:52,119 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:52,119 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:52,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-07-21 08:52:52,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2022-07-21 08:52:52,338 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:52,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:52,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1350000373, now seen corresponding path program 1 times [2022-07-21 08:52:52,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:52,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959248445] [2022-07-21 08:52:52,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:52,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:52,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:52,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959248445] [2022-07-21 08:52:52,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959248445] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:52,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776001142] [2022-07-21 08:52:52,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:52,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:52,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:52,444 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:52,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-07-21 08:52:53,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:53,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:52:53,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:53,112 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:53,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:53,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776001142] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:53,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:53,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:52:53,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653136126] [2022-07-21 08:52:53,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:53,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:52:53,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:53,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:52:53,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:52:53,334 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 710 out of 898 [2022-07-21 08:52:53,341 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 819 places, 751 transitions, 1771 flow. Second operand has 34 states, 34 states have (on average 712.7941176470588) internal successors, (24235), 34 states have internal predecessors, (24235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:53,341 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:53,341 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 710 of 898 [2022-07-21 08:52:53,341 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:54,195 INFO L129 PetriNetUnfolder]: 0/1081 cut-off events. [2022-07-21 08:52:54,195 INFO L130 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-07-21 08:52:54,195 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1726 conditions, 1081 events. 0/1081 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3256 event pairs, 0 based on Foata normal form. 8/1089 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2022-07-21 08:52:54,197 INFO L132 encePairwiseOnDemand]: 892/898 looper letters, 59 selfloop transitions, 45 changer transitions 0/802 dead transitions. [2022-07-21 08:52:54,197 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 863 places, 802 transitions, 2295 flow [2022-07-21 08:52:54,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 08:52:54,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-21 08:52:54,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 32062 transitions. [2022-07-21 08:52:54,211 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7934174709230388 [2022-07-21 08:52:54,211 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 32062 transitions. [2022-07-21 08:52:54,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 32062 transitions. [2022-07-21 08:52:54,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:54,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 32062 transitions. [2022-07-21 08:52:54,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 712.4888888888889) internal successors, (32062), 45 states have internal predecessors, (32062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:54,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 898.0) internal successors, (41308), 46 states have internal predecessors, (41308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:54,257 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 898.0) internal successors, (41308), 46 states have internal predecessors, (41308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:54,258 INFO L186 Difference]: Start difference. First operand has 819 places, 751 transitions, 1771 flow. Second operand 45 states and 32062 transitions. [2022-07-21 08:52:54,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 863 places, 802 transitions, 2295 flow [2022-07-21 08:52:54,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 857 places, 802 transitions, 2255 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-21 08:52:54,269 INFO L242 Difference]: Finished difference. Result has 866 places, 776 transitions, 2049 flow [2022-07-21 08:52:54,269 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=898, PETRI_DIFFERENCE_MINUEND_FLOW=1747, PETRI_DIFFERENCE_MINUEND_PLACES=813, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=728, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2049, PETRI_PLACES=866, PETRI_TRANSITIONS=776} [2022-07-21 08:52:54,269 INFO L279 CegarLoopForPetriNet]: 795 programPoint places, 71 predicate places. [2022-07-21 08:52:54,269 INFO L495 AbstractCegarLoop]: Abstraction has has 866 places, 776 transitions, 2049 flow [2022-07-21 08:52:54,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 712.7941176470588) internal successors, (24235), 34 states have internal predecessors, (24235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:54,271 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:54,272 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:54,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-07-21 08:52:54,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:54,490 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:54,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:54,491 INFO L85 PathProgramCache]: Analyzing trace with hash 667157287, now seen corresponding path program 1 times [2022-07-21 08:52:54,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:54,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373323509] [2022-07-21 08:52:54,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:54,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:54,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:54,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:54,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373323509] [2022-07-21 08:52:54,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373323509] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:54,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538005030] [2022-07-21 08:52:54,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:54,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:54,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:54,746 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:54,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-07-21 08:52:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:55,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 08:52:55,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:55,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:55,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:56,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538005030] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:56,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:56,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-21 08:52:56,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68191000] [2022-07-21 08:52:56,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:56,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-21 08:52:56,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:56,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-21 08:52:56,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-21 08:52:56,206 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 710 out of 898 [2022-07-21 08:52:56,219 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 866 places, 776 transitions, 2049 flow. Second operand has 66 states, 66 states have (on average 712.8939393939394) internal successors, (47051), 66 states have internal predecessors, (47051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:56,219 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:56,220 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 710 of 898 [2022-07-21 08:52:56,220 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:57,635 INFO L129 PetriNetUnfolder]: 0/938 cut-off events. [2022-07-21 08:52:57,635 INFO L130 PetriNetUnfolder]: For 1498/1498 co-relation queries the response was YES. [2022-07-21 08:52:57,635 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1599 conditions, 938 events. 0/938 cut-off events. For 1498/1498 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2345 event pairs, 0 based on Foata normal form. 11/949 useless extension candidates. Maximal degree in co-relation 0. Up to 46 conditions per place. [2022-07-21 08:52:57,637 INFO L132 encePairwiseOnDemand]: 893/898 looper letters, 78 selfloop transitions, 76 changer transitions 0/840 dead transitions. [2022-07-21 08:52:57,637 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 930 places, 840 transitions, 2887 flow [2022-07-21 08:52:57,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-21 08:52:57,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-07-21 08:52:57,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 55545 transitions. [2022-07-21 08:52:57,660 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7930015418879561 [2022-07-21 08:52:57,660 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 55545 transitions. [2022-07-21 08:52:57,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 55545 transitions. [2022-07-21 08:52:57,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:57,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 55545 transitions. [2022-07-21 08:52:57,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 712.1153846153846) internal successors, (55545), 78 states have internal predecessors, (55545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:57,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 898.0) internal successors, (70942), 79 states have internal predecessors, (70942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:57,750 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 898.0) internal successors, (70942), 79 states have internal predecessors, (70942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:57,751 INFO L186 Difference]: Start difference. First operand has 866 places, 776 transitions, 2049 flow. Second operand 78 states and 55545 transitions. [2022-07-21 08:52:57,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 930 places, 840 transitions, 2887 flow [2022-07-21 08:52:57,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 897 places, 840 transitions, 2678 flow, removed 20 selfloop flow, removed 33 redundant places. [2022-07-21 08:52:57,763 INFO L242 Difference]: Finished difference. Result has 897 places, 793 transitions, 2263 flow [2022-07-21 08:52:57,763 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=898, PETRI_DIFFERENCE_MINUEND_FLOW=1881, PETRI_DIFFERENCE_MINUEND_PLACES=820, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=2263, PETRI_PLACES=897, PETRI_TRANSITIONS=793} [2022-07-21 08:52:57,764 INFO L279 CegarLoopForPetriNet]: 795 programPoint places, 102 predicate places. [2022-07-21 08:52:57,764 INFO L495 AbstractCegarLoop]: Abstraction has has 897 places, 793 transitions, 2263 flow [2022-07-21 08:52:57,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 712.8939393939394) internal successors, (47051), 66 states have internal predecessors, (47051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:57,768 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:57,769 INFO L200 CegarLoopForPetriNet]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:57,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:57,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:57,983 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:57,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:57,984 INFO L85 PathProgramCache]: Analyzing trace with hash 271882808, now seen corresponding path program 1 times [2022-07-21 08:52:57,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:57,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005848482] [2022-07-21 08:52:57,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:57,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:52:58,017 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:52:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:52:58,083 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:52:58,084 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:52:58,084 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:52:58,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:52:58,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-07-21 08:52:58,084 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 08:52:58,085 WARN L231 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:52:58,085 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2022-07-21 08:52:58,127 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:52:58,131 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 824 places, 931 transitions, 2642 flow [2022-07-21 08:52:58,765 INFO L129 PetriNetUnfolder]: 264/1940 cut-off events. [2022-07-21 08:52:58,765 INFO L130 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2022-07-21 08:52:58,855 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2370 conditions, 1940 events. 264/1940 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7312 event pairs, 0 based on Foata normal form. 0/1622 useless extension candidates. Maximal degree in co-relation 2241. Up to 54 conditions per place. [2022-07-21 08:52:58,856 INFO L82 GeneralOperation]: Start removeDead. Operand has 824 places, 931 transitions, 2642 flow [2022-07-21 08:52:58,892 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 824 places, 931 transitions, 2642 flow [2022-07-21 08:52:58,892 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:52:58,892 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:52:58,893 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:52:58,896 INFO L129 PetriNetUnfolder]: 4/91 cut-off events. [2022-07-21 08:52:58,896 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:52:58,896 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:58,896 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] [2022-07-21 08:52:58,896 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:58,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:58,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1303807065, now seen corresponding path program 1 times [2022-07-21 08:52:58,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:58,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868843010] [2022-07-21 08:52:58,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:58,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:58,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:58,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868843010] [2022-07-21 08:52:58,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868843010] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:52:58,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:52:58,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:52:58,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846934253] [2022-07-21 08:52:58,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:52:58,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:52:58,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:58,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:52:58,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:52:58,916 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 737 out of 931 [2022-07-21 08:52:58,917 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 824 places, 931 transitions, 2642 flow. Second operand has 3 states, 3 states have (on average 738.0) internal successors, (2214), 3 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:58,917 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:58,917 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 737 of 931 [2022-07-21 08:52:58,917 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:59,586 INFO L129 PetriNetUnfolder]: 0/1624 cut-off events. [2022-07-21 08:52:59,587 INFO L130 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2022-07-21 08:52:59,587 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2215 conditions, 1624 events. 0/1624 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6846 event pairs, 0 based on Foata normal form. 11699/13271 useless extension candidates. Maximal degree in co-relation 0. Up to 156 conditions per place. [2022-07-21 08:52:59,590 INFO L132 encePairwiseOnDemand]: 768/931 looper letters, 35 selfloop transitions, 2 changer transitions 12/774 dead transitions. [2022-07-21 08:52:59,590 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 774 transitions, 2402 flow [2022-07-21 08:52:59,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:52:59,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:52:59,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2416 transitions. [2022-07-21 08:52:59,592 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8650196920873613 [2022-07-21 08:52:59,592 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2416 transitions. [2022-07-21 08:52:59,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2416 transitions. [2022-07-21 08:52:59,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:59,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2416 transitions. [2022-07-21 08:52:59,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 805.3333333333334) internal successors, (2416), 3 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:59,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 931.0) internal successors, (3724), 4 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:59,596 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 931.0) internal successors, (3724), 4 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:59,596 INFO L186 Difference]: Start difference. First operand has 824 places, 931 transitions, 2642 flow. Second operand 3 states and 2416 transitions. [2022-07-21 08:52:59,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 825 places, 774 transitions, 2402 flow [2022-07-21 08:52:59,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 825 places, 774 transitions, 1752 flow, removed 325 selfloop flow, removed 0 redundant places. [2022-07-21 08:52:59,608 INFO L242 Difference]: Finished difference. Result has 826 places, 759 transitions, 1658 flow [2022-07-21 08:52:59,608 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=931, PETRI_DIFFERENCE_MINUEND_FLOW=1670, PETRI_DIFFERENCE_MINUEND_PLACES=823, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=768, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1658, PETRI_PLACES=826, PETRI_TRANSITIONS=759} [2022-07-21 08:52:59,609 INFO L279 CegarLoopForPetriNet]: 824 programPoint places, 2 predicate places. [2022-07-21 08:52:59,609 INFO L495 AbstractCegarLoop]: Abstraction has has 826 places, 759 transitions, 1658 flow [2022-07-21 08:52:59,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 738.0) internal successors, (2214), 3 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:59,609 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:59,609 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:59,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-07-21 08:52:59,609 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:59,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:59,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1752528192, now seen corresponding path program 1 times [2022-07-21 08:52:59,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:59,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066865670] [2022-07-21 08:52:59,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:59,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:59,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:59,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:59,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066865670] [2022-07-21 08:52:59,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066865670] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:59,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778483467] [2022-07-21 08:52:59,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:59,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:59,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:59,636 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:59,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-07-21 08:53:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:00,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:53:00,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:00,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:00,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778483467] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:00,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:53:00,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:53:00,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282441254] [2022-07-21 08:53:00,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:00,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:53:00,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:00,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:53:00,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:53:00,247 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 736 out of 931 [2022-07-21 08:53:00,249 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 826 places, 759 transitions, 1658 flow. Second operand has 10 states, 10 states have (on average 738.3) internal successors, (7383), 10 states have internal predecessors, (7383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:00,249 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:00,249 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 736 of 931 [2022-07-21 08:53:00,249 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:00,850 INFO L129 PetriNetUnfolder]: 0/1286 cut-off events. [2022-07-21 08:53:00,850 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-07-21 08:53:00,851 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1630 conditions, 1286 events. 0/1286 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4473 event pairs, 0 based on Foata normal form. 2/1288 useless extension candidates. Maximal degree in co-relation 0. Up to 99 conditions per place. [2022-07-21 08:53:00,853 INFO L132 encePairwiseOnDemand]: 925/931 looper letters, 36 selfloop transitions, 9 changer transitions 0/769 dead transitions. [2022-07-21 08:53:00,853 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 822 places, 769 transitions, 1770 flow [2022-07-21 08:53:00,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:53:00,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:53:00,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6671 transitions. [2022-07-21 08:53:00,856 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7961570593149541 [2022-07-21 08:53:00,856 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6671 transitions. [2022-07-21 08:53:00,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6671 transitions. [2022-07-21 08:53:00,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:00,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6671 transitions. [2022-07-21 08:53:00,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 741.2222222222222) internal successors, (6671), 9 states have internal predecessors, (6671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:00,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 931.0) internal successors, (9310), 10 states have internal predecessors, (9310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:00,865 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 931.0) internal successors, (9310), 10 states have internal predecessors, (9310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:00,865 INFO L186 Difference]: Start difference. First operand has 826 places, 759 transitions, 1658 flow. Second operand 9 states and 6671 transitions. [2022-07-21 08:53:00,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 822 places, 769 transitions, 1770 flow [2022-07-21 08:53:00,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 821 places, 769 transitions, 1768 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:53:00,872 INFO L242 Difference]: Finished difference. Result has 824 places, 765 transitions, 1706 flow [2022-07-21 08:53:00,872 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=931, PETRI_DIFFERENCE_MINUEND_FLOW=1656, PETRI_DIFFERENCE_MINUEND_PLACES=813, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=753, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1706, PETRI_PLACES=824, PETRI_TRANSITIONS=765} [2022-07-21 08:53:00,873 INFO L279 CegarLoopForPetriNet]: 824 programPoint places, 0 predicate places. [2022-07-21 08:53:00,873 INFO L495 AbstractCegarLoop]: Abstraction has has 824 places, 765 transitions, 1706 flow [2022-07-21 08:53:00,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 738.3) internal successors, (7383), 10 states have internal predecessors, (7383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:00,874 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:00,874 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:00,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-07-21 08:53:01,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-07-21 08:53:01,094 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:01,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:01,094 INFO L85 PathProgramCache]: Analyzing trace with hash 418504373, now seen corresponding path program 1 times [2022-07-21 08:53:01,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:01,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135117365] [2022-07-21 08:53:01,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:01,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:01,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:01,135 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:01,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:01,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135117365] [2022-07-21 08:53:01,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135117365] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:01,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885948447] [2022-07-21 08:53:01,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:01,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:01,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:01,137 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:53:01,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-07-21 08:53:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:01,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:53:01,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:01,724 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:01,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:01,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885948447] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:01,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:53:01,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:53:01,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127743335] [2022-07-21 08:53:01,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:01,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:53:01,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:01,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:53:01,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:53:01,804 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 736 out of 931 [2022-07-21 08:53:01,808 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 824 places, 765 transitions, 1706 flow. Second operand has 18 states, 18 states have (on average 738.6111111111111) internal successors, (13295), 18 states have internal predecessors, (13295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:01,808 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:01,808 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 736 of 931 [2022-07-21 08:53:01,808 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:02,521 INFO L129 PetriNetUnfolder]: 0/1234 cut-off events. [2022-07-21 08:53:02,521 INFO L130 PetriNetUnfolder]: For 150/150 co-relation queries the response was YES. [2022-07-21 08:53:02,521 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1767 conditions, 1234 events. 0/1234 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4116 event pairs, 0 based on Foata normal form. 4/1238 useless extension candidates. Maximal degree in co-relation 0. Up to 83 conditions per place. [2022-07-21 08:53:02,523 INFO L132 encePairwiseOnDemand]: 925/931 looper letters, 44 selfloop transitions, 21 changer transitions 0/789 dead transitions. [2022-07-21 08:53:02,524 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 844 places, 789 transitions, 1944 flow [2022-07-21 08:53:02,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:53:02,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:53:02,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 15525 transitions. [2022-07-21 08:53:02,530 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7940770293079638 [2022-07-21 08:53:02,530 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 15525 transitions. [2022-07-21 08:53:02,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 15525 transitions. [2022-07-21 08:53:02,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:02,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 15525 transitions. [2022-07-21 08:53:02,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 739.2857142857143) internal successors, (15525), 21 states have internal predecessors, (15525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:02,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 931.0) internal successors, (20482), 22 states have internal predecessors, (20482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:02,550 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 931.0) internal successors, (20482), 22 states have internal predecessors, (20482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:02,550 INFO L186 Difference]: Start difference. First operand has 824 places, 765 transitions, 1706 flow. Second operand 21 states and 15525 transitions. [2022-07-21 08:53:02,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 844 places, 789 transitions, 1944 flow [2022-07-21 08:53:02,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 843 places, 789 transitions, 1930 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:53:02,560 INFO L242 Difference]: Finished difference. Result has 848 places, 778 transitions, 1830 flow [2022-07-21 08:53:02,560 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=931, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=823, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=754, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1830, PETRI_PLACES=848, PETRI_TRANSITIONS=778} [2022-07-21 08:53:02,560 INFO L279 CegarLoopForPetriNet]: 824 programPoint places, 24 predicate places. [2022-07-21 08:53:02,560 INFO L495 AbstractCegarLoop]: Abstraction has has 848 places, 778 transitions, 1830 flow [2022-07-21 08:53:02,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 738.6111111111111) internal successors, (13295), 18 states have internal predecessors, (13295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:02,561 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:02,562 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:02,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-07-21 08:53:02,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2022-07-21 08:53:02,781 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:02,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:02,781 INFO L85 PathProgramCache]: Analyzing trace with hash 442058667, now seen corresponding path program 1 times [2022-07-21 08:53:02,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:02,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420976857] [2022-07-21 08:53:02,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:02,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:02,886 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:02,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:02,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420976857] [2022-07-21 08:53:02,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420976857] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:02,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834012178] [2022-07-21 08:53:02,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:02,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:02,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:02,888 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:53:02,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-07-21 08:53:03,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:03,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:53:03,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:03,565 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:03,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:03,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834012178] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:03,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:53:03,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:53:03,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772177485] [2022-07-21 08:53:03,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:03,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:53:03,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:03,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:53:03,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:53:03,789 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 736 out of 931 [2022-07-21 08:53:03,795 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 848 places, 778 transitions, 1830 flow. Second operand has 34 states, 34 states have (on average 738.7941176470588) internal successors, (25119), 34 states have internal predecessors, (25119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:03,795 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:03,795 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 736 of 931 [2022-07-21 08:53:03,795 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:04,785 INFO L129 PetriNetUnfolder]: 0/1130 cut-off events. [2022-07-21 08:53:04,786 INFO L130 PetriNetUnfolder]: For 573/573 co-relation queries the response was YES. [2022-07-21 08:53:04,786 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1805 conditions, 1130 events. 0/1130 cut-off events. For 573/573 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3441 event pairs, 0 based on Foata normal form. 8/1138 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2022-07-21 08:53:04,788 INFO L132 encePairwiseOnDemand]: 925/931 looper letters, 60 selfloop transitions, 45 changer transitions 0/829 dead transitions. [2022-07-21 08:53:04,788 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 892 places, 829 transitions, 2356 flow [2022-07-21 08:53:04,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 08:53:04,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-21 08:53:04,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 33233 transitions. [2022-07-21 08:53:04,802 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7932450173051677 [2022-07-21 08:53:04,802 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 33233 transitions. [2022-07-21 08:53:04,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 33233 transitions. [2022-07-21 08:53:04,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:04,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 33233 transitions. [2022-07-21 08:53:04,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 738.5111111111111) internal successors, (33233), 45 states have internal predecessors, (33233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:04,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 931.0) internal successors, (42826), 46 states have internal predecessors, (42826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:04,852 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 931.0) internal successors, (42826), 46 states have internal predecessors, (42826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:04,853 INFO L186 Difference]: Start difference. First operand has 848 places, 778 transitions, 1830 flow. Second operand 45 states and 33233 transitions. [2022-07-21 08:53:04,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 892 places, 829 transitions, 2356 flow [2022-07-21 08:53:04,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 886 places, 829 transitions, 2316 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-21 08:53:04,863 INFO L242 Difference]: Finished difference. Result has 895 places, 803 transitions, 2108 flow [2022-07-21 08:53:04,863 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=931, PETRI_DIFFERENCE_MINUEND_FLOW=1806, PETRI_DIFFERENCE_MINUEND_PLACES=842, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=755, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2108, PETRI_PLACES=895, PETRI_TRANSITIONS=803} [2022-07-21 08:53:04,863 INFO L279 CegarLoopForPetriNet]: 824 programPoint places, 71 predicate places. [2022-07-21 08:53:04,863 INFO L495 AbstractCegarLoop]: Abstraction has has 895 places, 803 transitions, 2108 flow [2022-07-21 08:53:04,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 738.7941176470588) internal successors, (25119), 34 states have internal predecessors, (25119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:04,866 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:04,866 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:04,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-07-21 08:53:05,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:05,079 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:05,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:05,080 INFO L85 PathProgramCache]: Analyzing trace with hash -65480249, now seen corresponding path program 1 times [2022-07-21 08:53:05,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:05,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847853061] [2022-07-21 08:53:05,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:05,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:05,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:05,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:05,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847853061] [2022-07-21 08:53:05,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847853061] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:05,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884357876] [2022-07-21 08:53:05,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:05,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:05,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:05,374 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:53:05,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-07-21 08:53:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:06,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 08:53:06,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:06,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:06,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:06,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:06,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884357876] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:06,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:53:06,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-21 08:53:06,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910711756] [2022-07-21 08:53:06,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:06,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-21 08:53:06,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:06,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-21 08:53:06,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-21 08:53:06,896 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 736 out of 931 [2022-07-21 08:53:06,909 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 895 places, 803 transitions, 2108 flow. Second operand has 66 states, 66 states have (on average 738.8939393939394) internal successors, (48767), 66 states have internal predecessors, (48767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:06,909 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:06,909 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 736 of 931 [2022-07-21 08:53:06,909 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:08,123 INFO L129 PetriNetUnfolder]: 0/974 cut-off events. [2022-07-21 08:53:08,123 INFO L130 PetriNetUnfolder]: For 1619/1619 co-relation queries the response was YES. [2022-07-21 08:53:08,123 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1662 conditions, 974 events. 0/974 cut-off events. For 1619/1619 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2443 event pairs, 0 based on Foata normal form. 12/986 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2022-07-21 08:53:08,125 INFO L132 encePairwiseOnDemand]: 926/931 looper letters, 81 selfloop transitions, 79 changer transitions 0/872 dead transitions. [2022-07-21 08:53:08,125 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 962 places, 872 transitions, 3002 flow [2022-07-21 08:53:08,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-21 08:53:08,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-07-21 08:53:08,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 59788 transitions. [2022-07-21 08:53:08,297 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7928286324276299 [2022-07-21 08:53:08,298 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 59788 transitions. [2022-07-21 08:53:08,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 59788 transitions. [2022-07-21 08:53:08,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:08,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 59788 transitions. [2022-07-21 08:53:08,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 738.1234567901234) internal successors, (59788), 81 states have internal predecessors, (59788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:08,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 931.0) internal successors, (76342), 82 states have internal predecessors, (76342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:08,394 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 931.0) internal successors, (76342), 82 states have internal predecessors, (76342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:08,394 INFO L186 Difference]: Start difference. First operand has 895 places, 803 transitions, 2108 flow. Second operand 81 states and 59788 transitions. [2022-07-21 08:53:08,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 962 places, 872 transitions, 3002 flow [2022-07-21 08:53:08,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 929 places, 872 transitions, 2785 flow, removed 21 selfloop flow, removed 33 redundant places. [2022-07-21 08:53:08,406 INFO L242 Difference]: Finished difference. Result has 929 places, 823 transitions, 2351 flow [2022-07-21 08:53:08,406 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=931, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=849, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=744, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=2351, PETRI_PLACES=929, PETRI_TRANSITIONS=823} [2022-07-21 08:53:08,407 INFO L279 CegarLoopForPetriNet]: 824 programPoint places, 105 predicate places. [2022-07-21 08:53:08,407 INFO L495 AbstractCegarLoop]: Abstraction has has 929 places, 823 transitions, 2351 flow [2022-07-21 08:53:08,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 738.8939393939394) internal successors, (48767), 66 states have internal predecessors, (48767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:08,412 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:08,412 INFO L200 CegarLoopForPetriNet]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:08,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-07-21 08:53:08,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:08,633 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:08,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:08,633 INFO L85 PathProgramCache]: Analyzing trace with hash -150822230, now seen corresponding path program 1 times [2022-07-21 08:53:08,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:08,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390825990] [2022-07-21 08:53:08,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:08,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:53:08,662 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:53:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:53:08,707 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:53:08,707 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:53:08,708 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:53:08,708 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:53:08,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-07-21 08:53:08,708 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 08:53:08,708 WARN L231 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:53:08,708 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2022-07-21 08:53:08,750 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:53:08,754 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 853 places, 964 transitions, 2765 flow [2022-07-21 08:53:09,388 INFO L129 PetriNetUnfolder]: 274/2012 cut-off events. [2022-07-21 08:53:09,388 INFO L130 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2022-07-21 08:53:09,532 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2472 conditions, 2012 events. 274/2012 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7658 event pairs, 0 based on Foata normal form. 0/1682 useless extension candidates. Maximal degree in co-relation 2342. Up to 56 conditions per place. [2022-07-21 08:53:09,532 INFO L82 GeneralOperation]: Start removeDead. Operand has 853 places, 964 transitions, 2765 flow [2022-07-21 08:53:09,587 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 853 places, 964 transitions, 2765 flow [2022-07-21 08:53:09,587 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:53:09,588 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:53:09,588 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:53:09,591 INFO L129 PetriNetUnfolder]: 5/92 cut-off events. [2022-07-21 08:53:09,591 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:53:09,591 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:09,592 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] [2022-07-21 08:53:09,592 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:09,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:09,592 INFO L85 PathProgramCache]: Analyzing trace with hash 188590246, now seen corresponding path program 1 times [2022-07-21 08:53:09,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:09,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215539182] [2022-07-21 08:53:09,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:09,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:09,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:09,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:09,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215539182] [2022-07-21 08:53:09,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215539182] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:53:09,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:53:09,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:53:09,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520016695] [2022-07-21 08:53:09,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:53:09,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:53:09,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:09,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:53:09,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:53:09,609 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 770 out of 964 [2022-07-21 08:53:09,610 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 853 places, 964 transitions, 2765 flow. Second operand has 2 states, 2 states have (on average 770.5) internal successors, (1541), 2 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:09,610 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:09,610 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 770 of 964 [2022-07-21 08:53:09,610 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:10,258 INFO L129 PetriNetUnfolder]: 0/1710 cut-off events. [2022-07-21 08:53:10,259 INFO L130 PetriNetUnfolder]: For 4005/4005 co-relation queries the response was YES. [2022-07-21 08:53:10,259 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2198 conditions, 1710 events. 0/1710 cut-off events. For 4005/4005 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7160 event pairs, 0 based on Foata normal form. 2226/3880 useless extension candidates. Maximal degree in co-relation 0. Up to 28 conditions per place. [2022-07-21 08:53:10,261 INFO L132 encePairwiseOnDemand]: 798/964 looper letters, 27 selfloop transitions, 0 changer transitions 12/797 dead transitions. [2022-07-21 08:53:10,261 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 853 places, 797 transitions, 2485 flow [2022-07-21 08:53:10,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:53:10,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:53:10,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1733 transitions. [2022-07-21 08:53:10,263 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8988589211618258 [2022-07-21 08:53:10,263 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1733 transitions. [2022-07-21 08:53:10,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1733 transitions. [2022-07-21 08:53:10,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:10,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1733 transitions. [2022-07-21 08:53:10,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 866.5) internal successors, (1733), 2 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:10,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 964.0) internal successors, (2892), 3 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:10,266 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 964.0) internal successors, (2892), 3 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:10,266 INFO L186 Difference]: Start difference. First operand has 853 places, 964 transitions, 2765 flow. Second operand 2 states and 1733 transitions. [2022-07-21 08:53:10,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 853 places, 797 transitions, 2485 flow [2022-07-21 08:53:10,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 853 places, 797 transitions, 1783 flow, removed 351 selfloop flow, removed 0 redundant places. [2022-07-21 08:53:10,277 INFO L242 Difference]: Finished difference. Result has 853 places, 785 transitions, 1705 flow [2022-07-21 08:53:10,277 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=964, PETRI_DIFFERENCE_MINUEND_FLOW=1729, PETRI_DIFFERENCE_MINUEND_PLACES=852, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=797, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1705, PETRI_PLACES=853, PETRI_TRANSITIONS=785} [2022-07-21 08:53:10,278 INFO L279 CegarLoopForPetriNet]: 853 programPoint places, 0 predicate places. [2022-07-21 08:53:10,278 INFO L495 AbstractCegarLoop]: Abstraction has has 853 places, 785 transitions, 1705 flow [2022-07-21 08:53:10,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 770.5) internal successors, (1541), 2 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:10,278 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:10,278 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] [2022-07-21 08:53:10,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-07-21 08:53:10,278 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:10,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:10,279 INFO L85 PathProgramCache]: Analyzing trace with hash -104812761, now seen corresponding path program 1 times [2022-07-21 08:53:10,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:10,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097520237] [2022-07-21 08:53:10,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:10,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:10,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:10,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:10,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:10,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097520237] [2022-07-21 08:53:10,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097520237] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:53:10,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:53:10,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:53:10,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061770071] [2022-07-21 08:53:10,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:53:10,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:53:10,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:10,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:53:10,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:53:10,298 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 763 out of 964 [2022-07-21 08:53:10,299 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 853 places, 785 transitions, 1705 flow. Second operand has 3 states, 3 states have (on average 764.0) internal successors, (2292), 3 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:10,299 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:10,299 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 763 of 964 [2022-07-21 08:53:10,299 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:10,866 INFO L129 PetriNetUnfolder]: 0/1361 cut-off events. [2022-07-21 08:53:10,866 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-21 08:53:10,867 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1638 conditions, 1361 events. 0/1361 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4796 event pairs, 0 based on Foata normal form. 0/1334 useless extension candidates. Maximal degree in co-relation 0. Up to 162 conditions per place. [2022-07-21 08:53:10,869 INFO L132 encePairwiseOnDemand]: 961/964 looper letters, 36 selfloop transitions, 2 changer transitions 0/789 dead transitions. [2022-07-21 08:53:10,869 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 843 places, 789 transitions, 1789 flow [2022-07-21 08:53:10,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:53:10,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:53:10,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2328 transitions. [2022-07-21 08:53:10,871 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8049792531120332 [2022-07-21 08:53:10,871 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2328 transitions. [2022-07-21 08:53:10,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2328 transitions. [2022-07-21 08:53:10,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:10,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2328 transitions. [2022-07-21 08:53:10,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 776.0) internal successors, (2328), 3 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:10,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 964.0) internal successors, (3856), 4 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:10,875 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 964.0) internal successors, (3856), 4 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:10,875 INFO L186 Difference]: Start difference. First operand has 853 places, 785 transitions, 1705 flow. Second operand 3 states and 2328 transitions. [2022-07-21 08:53:10,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 843 places, 789 transitions, 1789 flow [2022-07-21 08:53:10,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 843 places, 789 transitions, 1789 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:53:10,883 INFO L242 Difference]: Finished difference. Result has 844 places, 786 transitions, 1717 flow [2022-07-21 08:53:10,883 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=964, PETRI_DIFFERENCE_MINUEND_FLOW=1705, PETRI_DIFFERENCE_MINUEND_PLACES=841, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=783, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1717, PETRI_PLACES=844, PETRI_TRANSITIONS=786} [2022-07-21 08:53:10,883 INFO L279 CegarLoopForPetriNet]: 853 programPoint places, -9 predicate places. [2022-07-21 08:53:10,883 INFO L495 AbstractCegarLoop]: Abstraction has has 844 places, 786 transitions, 1717 flow [2022-07-21 08:53:10,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 764.0) internal successors, (2292), 3 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:10,884 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:10,884 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:10,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-07-21 08:53:10,884 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:10,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:10,884 INFO L85 PathProgramCache]: Analyzing trace with hash -144204960, now seen corresponding path program 1 times [2022-07-21 08:53:10,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:10,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225722922] [2022-07-21 08:53:10,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:10,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:10,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:10,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:10,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225722922] [2022-07-21 08:53:10,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225722922] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:10,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204960350] [2022-07-21 08:53:10,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:10,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:10,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:10,933 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:53:10,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-07-21 08:53:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:11,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:53:11,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:11,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:11,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204960350] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:11,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:53:11,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:53:11,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397036550] [2022-07-21 08:53:11,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:11,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:53:11,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:11,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:53:11,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:53:11,576 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 762 out of 964 [2022-07-21 08:53:11,578 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 844 places, 786 transitions, 1717 flow. Second operand has 10 states, 10 states have (on average 764.3) internal successors, (7643), 10 states have internal predecessors, (7643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:11,578 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:11,578 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 762 of 964 [2022-07-21 08:53:11,578 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:12,340 INFO L129 PetriNetUnfolder]: 0/1335 cut-off events. [2022-07-21 08:53:12,341 INFO L130 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-07-21 08:53:12,341 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1693 conditions, 1335 events. 0/1335 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4659 event pairs, 0 based on Foata normal form. 2/1337 useless extension candidates. Maximal degree in co-relation 0. Up to 103 conditions per place. [2022-07-21 08:53:12,343 INFO L132 encePairwiseOnDemand]: 958/964 looper letters, 37 selfloop transitions, 9 changer transitions 0/796 dead transitions. [2022-07-21 08:53:12,343 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 852 places, 796 transitions, 1831 flow [2022-07-21 08:53:12,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:53:12,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:53:12,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6906 transitions. [2022-07-21 08:53:12,348 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7959889349930843 [2022-07-21 08:53:12,348 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6906 transitions. [2022-07-21 08:53:12,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6906 transitions. [2022-07-21 08:53:12,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:12,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6906 transitions. [2022-07-21 08:53:12,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 767.3333333333334) internal successors, (6906), 9 states have internal predecessors, (6906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:12,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 964.0) internal successors, (9640), 10 states have internal predecessors, (9640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:12,360 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 964.0) internal successors, (9640), 10 states have internal predecessors, (9640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:12,360 INFO L186 Difference]: Start difference. First operand has 844 places, 786 transitions, 1717 flow. Second operand 9 states and 6906 transitions. [2022-07-21 08:53:12,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 852 places, 796 transitions, 1831 flow [2022-07-21 08:53:12,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 851 places, 796 transitions, 1829 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:53:12,368 INFO L242 Difference]: Finished difference. Result has 854 places, 792 transitions, 1765 flow [2022-07-21 08:53:12,369 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=964, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=843, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1765, PETRI_PLACES=854, PETRI_TRANSITIONS=792} [2022-07-21 08:53:12,369 INFO L279 CegarLoopForPetriNet]: 853 programPoint places, 1 predicate places. [2022-07-21 08:53:12,369 INFO L495 AbstractCegarLoop]: Abstraction has has 854 places, 792 transitions, 1765 flow [2022-07-21 08:53:12,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 764.3) internal successors, (7643), 10 states have internal predecessors, (7643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:12,370 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:12,370 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] [2022-07-21 08:53:12,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-07-21 08:53:12,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2022-07-21 08:53:12,583 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:12,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:12,584 INFO L85 PathProgramCache]: Analyzing trace with hash -588279275, now seen corresponding path program 1 times [2022-07-21 08:53:12,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:12,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84315332] [2022-07-21 08:53:12,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:12,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:12,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:12,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84315332] [2022-07-21 08:53:12,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84315332] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:12,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209995251] [2022-07-21 08:53:12,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:12,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:12,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:12,633 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:53:12,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-07-21 08:53:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:13,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:53:13,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:13,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:13,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209995251] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:13,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:53:13,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:53:13,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683204723] [2022-07-21 08:53:13,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:13,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:53:13,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:13,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:53:13,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:53:13,445 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 762 out of 964 [2022-07-21 08:53:13,452 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 854 places, 792 transitions, 1765 flow. Second operand has 18 states, 18 states have (on average 764.6111111111111) internal successors, (13763), 18 states have internal predecessors, (13763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:13,452 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:13,452 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 762 of 964 [2022-07-21 08:53:13,452 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:14,279 INFO L129 PetriNetUnfolder]: 0/1283 cut-off events. [2022-07-21 08:53:14,279 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-07-21 08:53:14,280 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1838 conditions, 1283 events. 0/1283 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4299 event pairs, 0 based on Foata normal form. 4/1287 useless extension candidates. Maximal degree in co-relation 0. Up to 87 conditions per place. [2022-07-21 08:53:14,282 INFO L132 encePairwiseOnDemand]: 958/964 looper letters, 45 selfloop transitions, 21 changer transitions 0/816 dead transitions. [2022-07-21 08:53:14,282 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 874 places, 816 transitions, 2005 flow [2022-07-21 08:53:14,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:53:14,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:53:14,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 16072 transitions. [2022-07-21 08:53:14,290 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7939142461964038 [2022-07-21 08:53:14,290 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 16072 transitions. [2022-07-21 08:53:14,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 16072 transitions. [2022-07-21 08:53:14,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:14,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 16072 transitions. [2022-07-21 08:53:14,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 765.3333333333334) internal successors, (16072), 21 states have internal predecessors, (16072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:14,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 964.0) internal successors, (21208), 22 states have internal predecessors, (21208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:14,316 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 964.0) internal successors, (21208), 22 states have internal predecessors, (21208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:14,316 INFO L186 Difference]: Start difference. First operand has 854 places, 792 transitions, 1765 flow. Second operand 21 states and 16072 transitions. [2022-07-21 08:53:14,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 874 places, 816 transitions, 2005 flow [2022-07-21 08:53:14,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 873 places, 816 transitions, 1991 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:53:14,326 INFO L242 Difference]: Finished difference. Result has 878 places, 805 transitions, 1889 flow [2022-07-21 08:53:14,327 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=964, PETRI_DIFFERENCE_MINUEND_FLOW=1759, PETRI_DIFFERENCE_MINUEND_PLACES=853, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=781, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1889, PETRI_PLACES=878, PETRI_TRANSITIONS=805} [2022-07-21 08:53:14,327 INFO L279 CegarLoopForPetriNet]: 853 programPoint places, 25 predicate places. [2022-07-21 08:53:14,327 INFO L495 AbstractCegarLoop]: Abstraction has has 878 places, 805 transitions, 1889 flow [2022-07-21 08:53:14,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 764.6111111111111) internal successors, (13763), 18 states have internal predecessors, (13763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:14,329 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:14,329 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:14,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-07-21 08:53:14,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-07-21 08:53:14,549 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:14,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:14,550 INFO L85 PathProgramCache]: Analyzing trace with hash -216222325, now seen corresponding path program 1 times [2022-07-21 08:53:14,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:14,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110473045] [2022-07-21 08:53:14,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:14,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:14,657 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:14,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:14,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110473045] [2022-07-21 08:53:14,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110473045] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:14,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77743370] [2022-07-21 08:53:14,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:14,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:14,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:14,660 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:53:14,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-07-21 08:53:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:15,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:53:15,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:15,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:15,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77743370] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:15,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:53:15,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:53:15,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480222813] [2022-07-21 08:53:15,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:15,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:53:15,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:15,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:53:15,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:53:15,711 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 762 out of 964 [2022-07-21 08:53:15,718 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 878 places, 805 transitions, 1889 flow. Second operand has 34 states, 34 states have (on average 764.7941176470588) internal successors, (26003), 34 states have internal predecessors, (26003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:15,718 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:15,718 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 762 of 964 [2022-07-21 08:53:15,718 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:16,640 INFO L129 PetriNetUnfolder]: 0/1179 cut-off events. [2022-07-21 08:53:16,641 INFO L130 PetriNetUnfolder]: For 600/600 co-relation queries the response was YES. [2022-07-21 08:53:16,641 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1885 conditions, 1179 events. 0/1179 cut-off events. For 600/600 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3625 event pairs, 0 based on Foata normal form. 8/1187 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2022-07-21 08:53:16,643 INFO L132 encePairwiseOnDemand]: 958/964 looper letters, 61 selfloop transitions, 45 changer transitions 0/856 dead transitions. [2022-07-21 08:53:16,643 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 922 places, 856 transitions, 2417 flow [2022-07-21 08:53:16,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 08:53:16,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-21 08:53:16,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 34404 transitions. [2022-07-21 08:53:16,657 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7930843706777316 [2022-07-21 08:53:16,657 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 34404 transitions. [2022-07-21 08:53:16,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 34404 transitions. [2022-07-21 08:53:16,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:16,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 34404 transitions. [2022-07-21 08:53:16,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 764.5333333333333) internal successors, (34404), 45 states have internal predecessors, (34404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:16,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 964.0) internal successors, (44344), 46 states have internal predecessors, (44344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:16,712 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 964.0) internal successors, (44344), 46 states have internal predecessors, (44344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:16,712 INFO L186 Difference]: Start difference. First operand has 878 places, 805 transitions, 1889 flow. Second operand 45 states and 34404 transitions. [2022-07-21 08:53:16,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 922 places, 856 transitions, 2417 flow [2022-07-21 08:53:16,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 916 places, 856 transitions, 2377 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-21 08:53:16,723 INFO L242 Difference]: Finished difference. Result has 925 places, 830 transitions, 2167 flow [2022-07-21 08:53:16,723 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=964, PETRI_DIFFERENCE_MINUEND_FLOW=1865, PETRI_DIFFERENCE_MINUEND_PLACES=872, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=782, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2167, PETRI_PLACES=925, PETRI_TRANSITIONS=830} [2022-07-21 08:53:16,724 INFO L279 CegarLoopForPetriNet]: 853 programPoint places, 72 predicate places. [2022-07-21 08:53:16,724 INFO L495 AbstractCegarLoop]: Abstraction has has 925 places, 830 transitions, 2167 flow [2022-07-21 08:53:16,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 764.7941176470588) internal successors, (26003), 34 states have internal predecessors, (26003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:16,726 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:16,727 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:16,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-07-21 08:53:16,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-07-21 08:53:16,935 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:16,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:16,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1474444455, now seen corresponding path program 1 times [2022-07-21 08:53:16,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:16,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253976501] [2022-07-21 08:53:16,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:16,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:17,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:17,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253976501] [2022-07-21 08:53:17,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253976501] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:17,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264842751] [2022-07-21 08:53:17,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:17,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:17,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:17,121 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:53:17,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-07-21 08:53:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:17,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 08:53:17,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:17,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:18,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:18,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264842751] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:18,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:53:18,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-21 08:53:18,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592450605] [2022-07-21 08:53:18,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:18,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-21 08:53:18,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:18,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-21 08:53:18,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-21 08:53:18,660 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 762 out of 964 [2022-07-21 08:53:18,673 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 925 places, 830 transitions, 2167 flow. Second operand has 66 states, 66 states have (on average 764.8939393939394) internal successors, (50483), 66 states have internal predecessors, (50483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:18,674 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:18,674 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 762 of 964 [2022-07-21 08:53:18,674 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:20,247 INFO L129 PetriNetUnfolder]: 0/1010 cut-off events. [2022-07-21 08:53:20,247 INFO L130 PetriNetUnfolder]: For 1740/1740 co-relation queries the response was YES. [2022-07-21 08:53:20,248 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1726 conditions, 1010 events. 0/1010 cut-off events. For 1740/1740 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2541 event pairs, 0 based on Foata normal form. 13/1023 useless extension candidates. Maximal degree in co-relation 0. Up to 50 conditions per place. [2022-07-21 08:53:20,249 INFO L132 encePairwiseOnDemand]: 959/964 looper letters, 84 selfloop transitions, 82 changer transitions 0/904 dead transitions. [2022-07-21 08:53:20,249 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 995 places, 904 transitions, 3117 flow [2022-07-21 08:53:20,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-07-21 08:53:20,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2022-07-21 08:53:20,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 64187 transitions. [2022-07-21 08:53:20,275 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7926669630507804 [2022-07-21 08:53:20,275 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 64187 transitions. [2022-07-21 08:53:20,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 64187 transitions. [2022-07-21 08:53:20,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:20,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 64187 transitions. [2022-07-21 08:53:20,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 764.1309523809524) internal successors, (64187), 84 states have internal predecessors, (64187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:20,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 964.0) internal successors, (81940), 85 states have internal predecessors, (81940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:20,377 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 964.0) internal successors, (81940), 85 states have internal predecessors, (81940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:20,377 INFO L186 Difference]: Start difference. First operand has 925 places, 830 transitions, 2167 flow. Second operand 84 states and 64187 transitions. [2022-07-21 08:53:20,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 995 places, 904 transitions, 3117 flow [2022-07-21 08:53:20,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 962 places, 904 transitions, 2892 flow, removed 22 selfloop flow, removed 33 redundant places. [2022-07-21 08:53:20,390 INFO L242 Difference]: Finished difference. Result has 962 places, 853 transitions, 2439 flow [2022-07-21 08:53:20,391 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=964, PETRI_DIFFERENCE_MINUEND_FLOW=1999, PETRI_DIFFERENCE_MINUEND_PLACES=879, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=771, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=2439, PETRI_PLACES=962, PETRI_TRANSITIONS=853} [2022-07-21 08:53:20,391 INFO L279 CegarLoopForPetriNet]: 853 programPoint places, 109 predicate places. [2022-07-21 08:53:20,391 INFO L495 AbstractCegarLoop]: Abstraction has has 962 places, 853 transitions, 2439 flow [2022-07-21 08:53:20,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 764.8939393939394) internal successors, (50483), 66 states have internal predecessors, (50483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:20,396 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:20,396 INFO L200 CegarLoopForPetriNet]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:20,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-07-21 08:53:20,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-07-21 08:53:20,611 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:20,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:20,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1939564189, now seen corresponding path program 1 times [2022-07-21 08:53:20,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:20,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477438338] [2022-07-21 08:53:20,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:20,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:53:20,652 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:53:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:53:20,713 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:53:20,713 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:53:20,713 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:53:20,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:53:20,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2022-07-21 08:53:20,714 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:20,714 WARN L231 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:53:20,714 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2022-07-21 08:53:20,798 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:53:20,803 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 882 places, 997 transitions, 2890 flow [2022-07-21 08:53:21,505 INFO L129 PetriNetUnfolder]: 284/2084 cut-off events. [2022-07-21 08:53:21,506 INFO L130 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2022-07-21 08:53:21,644 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2575 conditions, 2084 events. 284/2084 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7877 event pairs, 0 based on Foata normal form. 0/1742 useless extension candidates. Maximal degree in co-relation 2444. Up to 58 conditions per place. [2022-07-21 08:53:21,644 INFO L82 GeneralOperation]: Start removeDead. Operand has 882 places, 997 transitions, 2890 flow [2022-07-21 08:53:21,697 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 882 places, 997 transitions, 2890 flow [2022-07-21 08:53:21,697 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:53:21,697 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:53:21,698 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:53:21,701 INFO L129 PetriNetUnfolder]: 5/94 cut-off events. [2022-07-21 08:53:21,701 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:53:21,701 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:21,702 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] [2022-07-21 08:53:21,702 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:21,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:21,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1462249081, now seen corresponding path program 1 times [2022-07-21 08:53:21,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:21,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516001276] [2022-07-21 08:53:21,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:21,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:21,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:21,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:21,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516001276] [2022-07-21 08:53:21,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516001276] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:53:21,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:53:21,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:53:21,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725911402] [2022-07-21 08:53:21,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:53:21,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:53:21,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:21,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:53:21,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:53:21,729 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 789 out of 997 [2022-07-21 08:53:21,730 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 882 places, 997 transitions, 2890 flow. Second operand has 3 states, 3 states have (on average 790.0) internal successors, (2370), 3 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:21,730 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:21,730 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 789 of 997 [2022-07-21 08:53:21,730 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:22,515 INFO L129 PetriNetUnfolder]: 0/1746 cut-off events. [2022-07-21 08:53:22,515 INFO L130 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2022-07-21 08:53:22,516 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2410 conditions, 1746 events. 0/1746 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7383 event pairs, 0 based on Foata normal form. 13604/15294 useless extension candidates. Maximal degree in co-relation 0. Up to 168 conditions per place. [2022-07-21 08:53:22,519 INFO L132 encePairwiseOnDemand]: 822/997 looper letters, 37 selfloop transitions, 2 changer transitions 12/828 dead transitions. [2022-07-21 08:53:22,519 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 883 places, 828 transitions, 2630 flow [2022-07-21 08:53:22,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:53:22,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:53:22,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2586 transitions. [2022-07-21 08:53:22,521 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8645937813440321 [2022-07-21 08:53:22,521 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2586 transitions. [2022-07-21 08:53:22,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2586 transitions. [2022-07-21 08:53:22,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:22,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2586 transitions. [2022-07-21 08:53:22,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 862.0) internal successors, (2586), 3 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:22,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 997.0) internal successors, (3988), 4 states have internal predecessors, (3988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:22,525 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 997.0) internal successors, (3988), 4 states have internal predecessors, (3988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:22,525 INFO L186 Difference]: Start difference. First operand has 882 places, 997 transitions, 2890 flow. Second operand 3 states and 2586 transitions. [2022-07-21 08:53:22,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 883 places, 828 transitions, 2630 flow [2022-07-21 08:53:22,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 883 places, 828 transitions, 1874 flow, removed 378 selfloop flow, removed 0 redundant places. [2022-07-21 08:53:22,536 INFO L242 Difference]: Finished difference. Result has 884 places, 813 transitions, 1776 flow [2022-07-21 08:53:22,536 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=997, PETRI_DIFFERENCE_MINUEND_FLOW=1788, PETRI_DIFFERENCE_MINUEND_PLACES=881, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=824, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=822, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1776, PETRI_PLACES=884, PETRI_TRANSITIONS=813} [2022-07-21 08:53:22,536 INFO L279 CegarLoopForPetriNet]: 882 programPoint places, 2 predicate places. [2022-07-21 08:53:22,536 INFO L495 AbstractCegarLoop]: Abstraction has has 884 places, 813 transitions, 1776 flow [2022-07-21 08:53:22,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 790.0) internal successors, (2370), 3 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:22,537 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:22,537 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:22,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2022-07-21 08:53:22,537 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:22,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:22,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1229546752, now seen corresponding path program 1 times [2022-07-21 08:53:22,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:22,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081845298] [2022-07-21 08:53:22,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:22,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:22,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:22,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:22,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081845298] [2022-07-21 08:53:22,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081845298] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:22,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168991201] [2022-07-21 08:53:22,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:22,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:22,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:22,564 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:53:22,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-07-21 08:53:23,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:23,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:53:23,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:23,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:23,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168991201] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:23,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:53:23,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:53:23,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743705894] [2022-07-21 08:53:23,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:23,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:53:23,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:23,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:53:23,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:53:23,231 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 788 out of 997 [2022-07-21 08:53:23,233 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 884 places, 813 transitions, 1776 flow. Second operand has 10 states, 10 states have (on average 790.3) internal successors, (7903), 10 states have internal predecessors, (7903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:23,233 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:23,233 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 788 of 997 [2022-07-21 08:53:23,233 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:23,848 INFO L129 PetriNetUnfolder]: 0/1384 cut-off events. [2022-07-21 08:53:23,848 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-21 08:53:23,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1754 conditions, 1384 events. 0/1384 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4834 event pairs, 0 based on Foata normal form. 2/1386 useless extension candidates. Maximal degree in co-relation 0. Up to 107 conditions per place. [2022-07-21 08:53:23,851 INFO L132 encePairwiseOnDemand]: 991/997 looper letters, 38 selfloop transitions, 9 changer transitions 0/823 dead transitions. [2022-07-21 08:53:23,851 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 880 places, 823 transitions, 1892 flow [2022-07-21 08:53:23,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:53:23,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:53:23,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 7141 transitions. [2022-07-21 08:53:23,854 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7958319402652402 [2022-07-21 08:53:23,854 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 7141 transitions. [2022-07-21 08:53:23,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 7141 transitions. [2022-07-21 08:53:23,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:23,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 7141 transitions. [2022-07-21 08:53:23,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 793.4444444444445) internal successors, (7141), 9 states have internal predecessors, (7141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:23,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 997.0) internal successors, (9970), 10 states have internal predecessors, (9970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:23,864 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 997.0) internal successors, (9970), 10 states have internal predecessors, (9970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:23,864 INFO L186 Difference]: Start difference. First operand has 884 places, 813 transitions, 1776 flow. Second operand 9 states and 7141 transitions. [2022-07-21 08:53:23,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 880 places, 823 transitions, 1892 flow [2022-07-21 08:53:23,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 879 places, 823 transitions, 1890 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:53:23,872 INFO L242 Difference]: Finished difference. Result has 882 places, 819 transitions, 1824 flow [2022-07-21 08:53:23,872 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=997, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=871, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=813, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=807, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1824, PETRI_PLACES=882, PETRI_TRANSITIONS=819} [2022-07-21 08:53:23,873 INFO L279 CegarLoopForPetriNet]: 882 programPoint places, 0 predicate places. [2022-07-21 08:53:23,873 INFO L495 AbstractCegarLoop]: Abstraction has has 882 places, 819 transitions, 1824 flow [2022-07-21 08:53:23,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 790.3) internal successors, (7903), 10 states have internal predecessors, (7903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:23,874 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:23,874 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:23,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-07-21 08:53:24,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:24,094 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:24,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:24,094 INFO L85 PathProgramCache]: Analyzing trace with hash 567306805, now seen corresponding path program 1 times [2022-07-21 08:53:24,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:24,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613507891] [2022-07-21 08:53:24,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:24,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:24,141 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:24,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:24,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613507891] [2022-07-21 08:53:24,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613507891] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:24,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935830608] [2022-07-21 08:53:24,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:24,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:24,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:24,143 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:53:24,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-07-21 08:53:24,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:24,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:53:24,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:24,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:24,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935830608] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:24,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:53:24,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:53:24,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865350782] [2022-07-21 08:53:24,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:24,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:53:24,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:24,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:53:24,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:53:24,903 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 788 out of 997 [2022-07-21 08:53:24,907 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 882 places, 819 transitions, 1824 flow. Second operand has 18 states, 18 states have (on average 790.6111111111111) internal successors, (14231), 18 states have internal predecessors, (14231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:24,907 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:24,907 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 788 of 997 [2022-07-21 08:53:24,907 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:25,655 INFO L129 PetriNetUnfolder]: 0/1332 cut-off events. [2022-07-21 08:53:25,655 INFO L130 PetriNetUnfolder]: For 162/162 co-relation queries the response was YES. [2022-07-21 08:53:25,655 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1907 conditions, 1332 events. 0/1332 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4493 event pairs, 0 based on Foata normal form. 4/1336 useless extension candidates. Maximal degree in co-relation 0. Up to 91 conditions per place. [2022-07-21 08:53:25,658 INFO L132 encePairwiseOnDemand]: 991/997 looper letters, 46 selfloop transitions, 21 changer transitions 0/843 dead transitions. [2022-07-21 08:53:25,658 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 902 places, 843 transitions, 2066 flow [2022-07-21 08:53:25,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:53:25,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:53:25,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 16619 transitions. [2022-07-21 08:53:25,665 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7937622390982472 [2022-07-21 08:53:25,666 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 16619 transitions. [2022-07-21 08:53:25,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 16619 transitions. [2022-07-21 08:53:25,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:25,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 16619 transitions. [2022-07-21 08:53:25,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 791.3809523809524) internal successors, (16619), 21 states have internal predecessors, (16619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:25,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 997.0) internal successors, (21934), 22 states have internal predecessors, (21934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:25,688 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 997.0) internal successors, (21934), 22 states have internal predecessors, (21934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:25,688 INFO L186 Difference]: Start difference. First operand has 882 places, 819 transitions, 1824 flow. Second operand 21 states and 16619 transitions. [2022-07-21 08:53:25,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 902 places, 843 transitions, 2066 flow [2022-07-21 08:53:25,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 901 places, 843 transitions, 2052 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:53:25,698 INFO L242 Difference]: Finished difference. Result has 906 places, 832 transitions, 1948 flow [2022-07-21 08:53:25,699 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=997, PETRI_DIFFERENCE_MINUEND_FLOW=1818, PETRI_DIFFERENCE_MINUEND_PLACES=881, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=819, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=808, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1948, PETRI_PLACES=906, PETRI_TRANSITIONS=832} [2022-07-21 08:53:25,699 INFO L279 CegarLoopForPetriNet]: 882 programPoint places, 24 predicate places. [2022-07-21 08:53:25,699 INFO L495 AbstractCegarLoop]: Abstraction has has 906 places, 832 transitions, 1948 flow [2022-07-21 08:53:25,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 790.6111111111111) internal successors, (14231), 18 states have internal predecessors, (14231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:25,700 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:25,701 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:25,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-07-21 08:53:25,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:25,915 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:25,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:25,916 INFO L85 PathProgramCache]: Analyzing trace with hash 970123947, now seen corresponding path program 1 times [2022-07-21 08:53:25,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:25,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21264812] [2022-07-21 08:53:25,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:25,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:26,055 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:26,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:26,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21264812] [2022-07-21 08:53:26,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21264812] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:26,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181792249] [2022-07-21 08:53:26,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:26,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:26,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:26,057 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:53:26,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-07-21 08:53:26,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:26,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:53:26,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:26,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:26,959 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:26,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181792249] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:26,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:53:26,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:53:26,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126689766] [2022-07-21 08:53:26,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:26,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:53:26,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:26,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:53:26,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:53:26,969 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 788 out of 997 [2022-07-21 08:53:26,977 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 906 places, 832 transitions, 1948 flow. Second operand has 34 states, 34 states have (on average 790.7941176470588) internal successors, (26887), 34 states have internal predecessors, (26887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:26,977 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:26,977 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 788 of 997 [2022-07-21 08:53:26,977 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:27,969 INFO L129 PetriNetUnfolder]: 0/1228 cut-off events. [2022-07-21 08:53:27,969 INFO L130 PetriNetUnfolder]: For 627/627 co-relation queries the response was YES. [2022-07-21 08:53:27,970 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1963 conditions, 1228 events. 0/1228 cut-off events. For 627/627 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3805 event pairs, 0 based on Foata normal form. 8/1236 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2022-07-21 08:53:27,971 INFO L132 encePairwiseOnDemand]: 991/997 looper letters, 62 selfloop transitions, 45 changer transitions 0/883 dead transitions. [2022-07-21 08:53:27,972 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 950 places, 883 transitions, 2478 flow [2022-07-21 08:53:27,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 08:53:27,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-21 08:53:27,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 35575 transitions. [2022-07-21 08:53:27,987 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7929343586314499 [2022-07-21 08:53:27,987 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 35575 transitions. [2022-07-21 08:53:27,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 35575 transitions. [2022-07-21 08:53:27,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:27,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 35575 transitions. [2022-07-21 08:53:28,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 790.5555555555555) internal successors, (35575), 45 states have internal predecessors, (35575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:28,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 997.0) internal successors, (45862), 46 states have internal predecessors, (45862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:28,043 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 997.0) internal successors, (45862), 46 states have internal predecessors, (45862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:28,044 INFO L186 Difference]: Start difference. First operand has 906 places, 832 transitions, 1948 flow. Second operand 45 states and 35575 transitions. [2022-07-21 08:53:28,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 950 places, 883 transitions, 2478 flow [2022-07-21 08:53:28,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 944 places, 883 transitions, 2438 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-21 08:53:28,054 INFO L242 Difference]: Finished difference. Result has 953 places, 857 transitions, 2226 flow [2022-07-21 08:53:28,054 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=997, PETRI_DIFFERENCE_MINUEND_FLOW=1924, PETRI_DIFFERENCE_MINUEND_PLACES=900, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=809, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2226, PETRI_PLACES=953, PETRI_TRANSITIONS=857} [2022-07-21 08:53:28,055 INFO L279 CegarLoopForPetriNet]: 882 programPoint places, 71 predicate places. [2022-07-21 08:53:28,055 INFO L495 AbstractCegarLoop]: Abstraction has has 953 places, 857 transitions, 2226 flow [2022-07-21 08:53:28,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 790.7941176470588) internal successors, (26887), 34 states have internal predecessors, (26887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:28,058 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:28,058 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:28,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-07-21 08:53:28,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:28,278 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:28,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:28,278 INFO L85 PathProgramCache]: Analyzing trace with hash 991964103, now seen corresponding path program 1 times [2022-07-21 08:53:28,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:28,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425635098] [2022-07-21 08:53:28,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:28,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:28,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:28,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:28,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:28,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425635098] [2022-07-21 08:53:28,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425635098] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:28,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839042219] [2022-07-21 08:53:28,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:28,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:28,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:28,738 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:53:28,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-07-21 08:53:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:29,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 08:53:29,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:29,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:30,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839042219] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:30,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:53:30,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-21 08:53:30,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420359740] [2022-07-21 08:53:30,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:30,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-21 08:53:30,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:30,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-21 08:53:30,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-21 08:53:30,337 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 788 out of 997 [2022-07-21 08:53:30,353 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 953 places, 857 transitions, 2226 flow. Second operand has 66 states, 66 states have (on average 790.8939393939394) internal successors, (52199), 66 states have internal predecessors, (52199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:30,354 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:30,354 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 788 of 997 [2022-07-21 08:53:30,354 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:32,252 INFO L129 PetriNetUnfolder]: 0/1046 cut-off events. [2022-07-21 08:53:32,252 INFO L130 PetriNetUnfolder]: For 1861/1861 co-relation queries the response was YES. [2022-07-21 08:53:32,252 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1788 conditions, 1046 events. 0/1046 cut-off events. For 1861/1861 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2639 event pairs, 0 based on Foata normal form. 14/1060 useless extension candidates. Maximal degree in co-relation 0. Up to 52 conditions per place. [2022-07-21 08:53:32,254 INFO L132 encePairwiseOnDemand]: 992/997 looper letters, 87 selfloop transitions, 85 changer transitions 0/936 dead transitions. [2022-07-21 08:53:32,254 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1026 places, 936 transitions, 3232 flow [2022-07-21 08:53:32,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-21 08:53:32,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-07-21 08:53:32,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 68742 transitions. [2022-07-21 08:53:32,284 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7925154774668834 [2022-07-21 08:53:32,284 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 68742 transitions. [2022-07-21 08:53:32,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 68742 transitions. [2022-07-21 08:53:32,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:32,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 68742 transitions. [2022-07-21 08:53:32,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 790.1379310344828) internal successors, (68742), 87 states have internal predecessors, (68742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:32,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 997.0) internal successors, (87736), 88 states have internal predecessors, (87736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:32,610 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 997.0) internal successors, (87736), 88 states have internal predecessors, (87736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:32,610 INFO L186 Difference]: Start difference. First operand has 953 places, 857 transitions, 2226 flow. Second operand 87 states and 68742 transitions. [2022-07-21 08:53:32,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1026 places, 936 transitions, 3232 flow [2022-07-21 08:53:32,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 993 places, 936 transitions, 2999 flow, removed 23 selfloop flow, removed 33 redundant places. [2022-07-21 08:53:32,622 INFO L242 Difference]: Finished difference. Result has 993 places, 883 transitions, 2527 flow [2022-07-21 08:53:32,623 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=997, PETRI_DIFFERENCE_MINUEND_FLOW=2058, PETRI_DIFFERENCE_MINUEND_PLACES=907, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=798, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=2527, PETRI_PLACES=993, PETRI_TRANSITIONS=883} [2022-07-21 08:53:32,623 INFO L279 CegarLoopForPetriNet]: 882 programPoint places, 111 predicate places. [2022-07-21 08:53:32,623 INFO L495 AbstractCegarLoop]: Abstraction has has 993 places, 883 transitions, 2527 flow [2022-07-21 08:53:32,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 790.8939393939394) internal successors, (52199), 66 states have internal predecessors, (52199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:32,628 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:32,628 INFO L200 CegarLoopForPetriNet]: trace histogram [29, 29, 29, 29, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:32,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-07-21 08:53:32,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:32,829 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:32,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:32,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1128405327, now seen corresponding path program 1 times [2022-07-21 08:53:32,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:32,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610121015] [2022-07-21 08:53:32,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:32,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:53:32,864 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:53:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:53:32,917 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:53:32,918 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:53:32,918 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:53:32,918 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:53:32,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2022-07-21 08:53:32,918 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 08:53:32,919 WARN L231 ceAbstractionStarter]: 28 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:53:32,919 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 29 thread instances. [2022-07-21 08:53:32,964 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:53:32,968 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 911 places, 1030 transitions, 3017 flow [2022-07-21 08:53:33,738 INFO L129 PetriNetUnfolder]: 294/2156 cut-off events. [2022-07-21 08:53:33,739 INFO L130 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2022-07-21 08:53:33,901 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2679 conditions, 2156 events. 294/2156 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8137 event pairs, 0 based on Foata normal form. 0/1802 useless extension candidates. Maximal degree in co-relation 2547. Up to 60 conditions per place. [2022-07-21 08:53:33,901 INFO L82 GeneralOperation]: Start removeDead. Operand has 911 places, 1030 transitions, 3017 flow [2022-07-21 08:53:33,968 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 911 places, 1030 transitions, 3017 flow [2022-07-21 08:53:33,968 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:53:33,969 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:53:33,969 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:53:33,972 INFO L129 PetriNetUnfolder]: 4/91 cut-off events. [2022-07-21 08:53:33,972 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:53:33,972 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:33,973 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] [2022-07-21 08:53:33,973 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:33,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:33,973 INFO L85 PathProgramCache]: Analyzing trace with hash -787745722, now seen corresponding path program 1 times [2022-07-21 08:53:33,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:33,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841345853] [2022-07-21 08:53:33,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:33,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:33,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:33,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:33,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841345853] [2022-07-21 08:53:33,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841345853] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:53:33,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:53:33,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:53:33,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004201371] [2022-07-21 08:53:33,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:53:33,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:53:33,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:33,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:53:33,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:53:33,991 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 822 out of 1030 [2022-07-21 08:53:33,991 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 911 places, 1030 transitions, 3017 flow. Second operand has 2 states, 2 states have (on average 822.5) internal successors, (1645), 2 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:33,991 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:33,992 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 822 of 1030 [2022-07-21 08:53:33,992 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:34,801 INFO L129 PetriNetUnfolder]: 0/1832 cut-off events. [2022-07-21 08:53:34,801 INFO L130 PetriNetUnfolder]: For 4901/4901 co-relation queries the response was YES. [2022-07-21 08:53:34,802 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2385 conditions, 1832 events. 0/1832 cut-off events. For 4901/4901 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7846 event pairs, 0 based on Foata normal form. 2564/4336 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-07-21 08:53:34,804 INFO L132 encePairwiseOnDemand]: 852/1030 looper letters, 29 selfloop transitions, 0 changer transitions 12/851 dead transitions. [2022-07-21 08:53:34,804 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 911 places, 851 transitions, 2717 flow [2022-07-21 08:53:34,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:53:34,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:53:34,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1851 transitions. [2022-07-21 08:53:34,806 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8985436893203883 [2022-07-21 08:53:34,806 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1851 transitions. [2022-07-21 08:53:34,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1851 transitions. [2022-07-21 08:53:34,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:34,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1851 transitions. [2022-07-21 08:53:34,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 925.5) internal successors, (1851), 2 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:34,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1030.0) internal successors, (3090), 3 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:34,809 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1030.0) internal successors, (3090), 3 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:34,809 INFO L186 Difference]: Start difference. First operand has 911 places, 1030 transitions, 3017 flow. Second operand 2 states and 1851 transitions. [2022-07-21 08:53:34,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 911 places, 851 transitions, 2717 flow [2022-07-21 08:53:34,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 911 places, 851 transitions, 1905 flow, removed 406 selfloop flow, removed 0 redundant places. [2022-07-21 08:53:34,821 INFO L242 Difference]: Finished difference. Result has 911 places, 839 transitions, 1823 flow [2022-07-21 08:53:34,822 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1030, PETRI_DIFFERENCE_MINUEND_FLOW=1847, PETRI_DIFFERENCE_MINUEND_PLACES=910, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=851, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1823, PETRI_PLACES=911, PETRI_TRANSITIONS=839} [2022-07-21 08:53:34,822 INFO L279 CegarLoopForPetriNet]: 911 programPoint places, 0 predicate places. [2022-07-21 08:53:34,822 INFO L495 AbstractCegarLoop]: Abstraction has has 911 places, 839 transitions, 1823 flow [2022-07-21 08:53:34,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 822.5) internal successors, (1645), 2 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:34,823 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:34,823 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] [2022-07-21 08:53:34,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2022-07-21 08:53:34,823 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:34,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:34,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1081148729, now seen corresponding path program 1 times [2022-07-21 08:53:34,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:34,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436949458] [2022-07-21 08:53:34,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:34,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:34,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:34,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:34,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:34,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436949458] [2022-07-21 08:53:34,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436949458] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:53:34,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:53:34,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:53:34,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506012890] [2022-07-21 08:53:34,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:53:34,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:53:34,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:34,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:53:34,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:53:34,844 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 815 out of 1030 [2022-07-21 08:53:34,845 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 911 places, 839 transitions, 1823 flow. Second operand has 3 states, 3 states have (on average 816.0) internal successors, (2448), 3 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:34,845 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:34,845 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 815 of 1030 [2022-07-21 08:53:34,845 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:35,525 INFO L129 PetriNetUnfolder]: 0/1459 cut-off events. [2022-07-21 08:53:35,525 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-07-21 08:53:35,525 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1756 conditions, 1459 events. 0/1459 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5171 event pairs, 0 based on Foata normal form. 0/1430 useless extension candidates. Maximal degree in co-relation 0. Up to 174 conditions per place. [2022-07-21 08:53:35,528 INFO L132 encePairwiseOnDemand]: 1027/1030 looper letters, 38 selfloop transitions, 2 changer transitions 0/843 dead transitions. [2022-07-21 08:53:35,528 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 901 places, 843 transitions, 1911 flow [2022-07-21 08:53:35,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:53:35,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:53:35,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2486 transitions. [2022-07-21 08:53:35,530 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8045307443365696 [2022-07-21 08:53:35,530 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2486 transitions. [2022-07-21 08:53:35,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2486 transitions. [2022-07-21 08:53:35,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:35,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2486 transitions. [2022-07-21 08:53:35,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 828.6666666666666) internal successors, (2486), 3 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:35,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1030.0) internal successors, (4120), 4 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:35,534 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1030.0) internal successors, (4120), 4 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:35,534 INFO L186 Difference]: Start difference. First operand has 911 places, 839 transitions, 1823 flow. Second operand 3 states and 2486 transitions. [2022-07-21 08:53:35,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 901 places, 843 transitions, 1911 flow [2022-07-21 08:53:35,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 901 places, 843 transitions, 1911 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:53:35,542 INFO L242 Difference]: Finished difference. Result has 902 places, 840 transitions, 1835 flow [2022-07-21 08:53:35,543 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1030, PETRI_DIFFERENCE_MINUEND_FLOW=1823, PETRI_DIFFERENCE_MINUEND_PLACES=899, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=839, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=837, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1835, PETRI_PLACES=902, PETRI_TRANSITIONS=840} [2022-07-21 08:53:35,543 INFO L279 CegarLoopForPetriNet]: 911 programPoint places, -9 predicate places. [2022-07-21 08:53:35,543 INFO L495 AbstractCegarLoop]: Abstraction has has 902 places, 840 transitions, 1835 flow [2022-07-21 08:53:35,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 816.0) internal successors, (2448), 3 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:35,543 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:35,544 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:35,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2022-07-21 08:53:35,544 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:35,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:35,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1578816032, now seen corresponding path program 1 times [2022-07-21 08:53:35,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:35,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81409138] [2022-07-21 08:53:35,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:35,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:35,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:35,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81409138] [2022-07-21 08:53:35,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81409138] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:35,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353178929] [2022-07-21 08:53:35,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:35,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:35,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:35,570 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:53:35,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-07-21 08:53:36,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:36,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:53:36,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:36,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:36,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353178929] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:36,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:53:36,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:53:36,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090271312] [2022-07-21 08:53:36,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:36,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:53:36,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:36,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:53:36,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:53:36,128 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 814 out of 1030 [2022-07-21 08:53:36,131 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 902 places, 840 transitions, 1835 flow. Second operand has 10 states, 10 states have (on average 816.3) internal successors, (8163), 10 states have internal predecessors, (8163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:36,131 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:36,131 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 814 of 1030 [2022-07-21 08:53:36,131 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:36,950 INFO L129 PetriNetUnfolder]: 0/1433 cut-off events. [2022-07-21 08:53:36,950 INFO L130 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-07-21 08:53:36,951 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1817 conditions, 1433 events. 0/1433 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5016 event pairs, 0 based on Foata normal form. 2/1435 useless extension candidates. Maximal degree in co-relation 0. Up to 111 conditions per place. [2022-07-21 08:53:36,953 INFO L132 encePairwiseOnDemand]: 1024/1030 looper letters, 39 selfloop transitions, 9 changer transitions 0/850 dead transitions. [2022-07-21 08:53:36,953 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 910 places, 850 transitions, 1953 flow [2022-07-21 08:53:36,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:53:36,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:53:36,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 7376 transitions. [2022-07-21 08:53:36,958 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7956850053937432 [2022-07-21 08:53:36,958 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 7376 transitions. [2022-07-21 08:53:36,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 7376 transitions. [2022-07-21 08:53:36,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:36,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 7376 transitions. [2022-07-21 08:53:36,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 819.5555555555555) internal successors, (7376), 9 states have internal predecessors, (7376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:36,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1030.0) internal successors, (10300), 10 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:36,971 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1030.0) internal successors, (10300), 10 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:36,971 INFO L186 Difference]: Start difference. First operand has 902 places, 840 transitions, 1835 flow. Second operand 9 states and 7376 transitions. [2022-07-21 08:53:36,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 910 places, 850 transitions, 1953 flow [2022-07-21 08:53:36,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 909 places, 850 transitions, 1951 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:53:36,980 INFO L242 Difference]: Finished difference. Result has 912 places, 846 transitions, 1883 flow [2022-07-21 08:53:36,981 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1030, PETRI_DIFFERENCE_MINUEND_FLOW=1833, PETRI_DIFFERENCE_MINUEND_PLACES=901, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=834, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1883, PETRI_PLACES=912, PETRI_TRANSITIONS=846} [2022-07-21 08:53:36,981 INFO L279 CegarLoopForPetriNet]: 911 programPoint places, 1 predicate places. [2022-07-21 08:53:36,981 INFO L495 AbstractCegarLoop]: Abstraction has has 912 places, 846 transitions, 1883 flow [2022-07-21 08:53:36,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 816.3) internal successors, (8163), 10 states have internal predecessors, (8163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:36,982 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:36,983 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] [2022-07-21 08:53:37,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-07-21 08:53:37,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:37,201 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:37,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:37,201 INFO L85 PathProgramCache]: Analyzing trace with hash -409704683, now seen corresponding path program 1 times [2022-07-21 08:53:37,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:37,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348878015] [2022-07-21 08:53:37,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:37,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:37,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:37,248 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:37,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:37,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348878015] [2022-07-21 08:53:37,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348878015] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:37,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123933394] [2022-07-21 08:53:37,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:37,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:37,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:37,250 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:53:37,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-07-21 08:53:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:38,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:53:38,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:38,071 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:38,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:38,165 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:38,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123933394] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:38,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:53:38,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:53:38,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070786574] [2022-07-21 08:53:38,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:38,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:53:38,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:38,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:53:38,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:53:38,187 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 814 out of 1030 [2022-07-21 08:53:38,203 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 912 places, 846 transitions, 1883 flow. Second operand has 18 states, 18 states have (on average 816.6111111111111) internal successors, (14699), 18 states have internal predecessors, (14699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:38,203 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:38,203 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 814 of 1030 [2022-07-21 08:53:38,203 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:39,164 INFO L129 PetriNetUnfolder]: 0/1381 cut-off events. [2022-07-21 08:53:39,165 INFO L130 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2022-07-21 08:53:39,165 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1978 conditions, 1381 events. 0/1381 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4668 event pairs, 0 based on Foata normal form. 4/1385 useless extension candidates. Maximal degree in co-relation 0. Up to 95 conditions per place. [2022-07-21 08:53:39,168 INFO L132 encePairwiseOnDemand]: 1024/1030 looper letters, 47 selfloop transitions, 21 changer transitions 0/870 dead transitions. [2022-07-21 08:53:39,168 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 932 places, 870 transitions, 2127 flow [2022-07-21 08:53:39,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:53:39,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:53:39,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 17166 transitions. [2022-07-21 08:53:39,176 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.793619972260749 [2022-07-21 08:53:39,176 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 17166 transitions. [2022-07-21 08:53:39,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 17166 transitions. [2022-07-21 08:53:39,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:39,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 17166 transitions. [2022-07-21 08:53:39,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 817.4285714285714) internal successors, (17166), 21 states have internal predecessors, (17166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:39,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1030.0) internal successors, (22660), 22 states have internal predecessors, (22660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:39,202 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1030.0) internal successors, (22660), 22 states have internal predecessors, (22660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:39,202 INFO L186 Difference]: Start difference. First operand has 912 places, 846 transitions, 1883 flow. Second operand 21 states and 17166 transitions. [2022-07-21 08:53:39,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 932 places, 870 transitions, 2127 flow [2022-07-21 08:53:39,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 931 places, 870 transitions, 2113 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:53:39,214 INFO L242 Difference]: Finished difference. Result has 936 places, 859 transitions, 2007 flow [2022-07-21 08:53:39,214 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1030, PETRI_DIFFERENCE_MINUEND_FLOW=1877, PETRI_DIFFERENCE_MINUEND_PLACES=911, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=835, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2007, PETRI_PLACES=936, PETRI_TRANSITIONS=859} [2022-07-21 08:53:39,215 INFO L279 CegarLoopForPetriNet]: 911 programPoint places, 25 predicate places. [2022-07-21 08:53:39,215 INFO L495 AbstractCegarLoop]: Abstraction has has 936 places, 859 transitions, 2007 flow [2022-07-21 08:53:39,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 816.6111111111111) internal successors, (14699), 18 states have internal predecessors, (14699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:39,216 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:39,216 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:39,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-07-21 08:53:39,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-07-21 08:53:39,427 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:39,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:39,428 INFO L85 PathProgramCache]: Analyzing trace with hash -293869813, now seen corresponding path program 1 times [2022-07-21 08:53:39,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:39,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226828428] [2022-07-21 08:53:39,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:39,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:39,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:39,534 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:39,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:39,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226828428] [2022-07-21 08:53:39,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226828428] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:39,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109230735] [2022-07-21 08:53:39,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:39,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:39,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:39,537 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:53:39,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-07-21 08:53:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:40,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:53:40,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:40,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:40,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109230735] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:40,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:53:40,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:53:40,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082589822] [2022-07-21 08:53:40,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:40,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:53:40,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:40,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:53:40,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:53:40,593 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 814 out of 1030 [2022-07-21 08:53:40,602 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 936 places, 859 transitions, 2007 flow. Second operand has 34 states, 34 states have (on average 816.7941176470588) internal successors, (27771), 34 states have internal predecessors, (27771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:40,603 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:40,603 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 814 of 1030 [2022-07-21 08:53:40,603 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:41,737 INFO L129 PetriNetUnfolder]: 0/1277 cut-off events. [2022-07-21 08:53:41,737 INFO L130 PetriNetUnfolder]: For 654/654 co-relation queries the response was YES. [2022-07-21 08:53:41,738 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2043 conditions, 1277 events. 0/1277 cut-off events. For 654/654 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3991 event pairs, 0 based on Foata normal form. 8/1285 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2022-07-21 08:53:41,740 INFO L132 encePairwiseOnDemand]: 1024/1030 looper letters, 63 selfloop transitions, 45 changer transitions 0/910 dead transitions. [2022-07-21 08:53:41,740 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 980 places, 910 transitions, 2539 flow [2022-07-21 08:53:41,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 08:53:41,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-21 08:53:41,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 36746 transitions. [2022-07-21 08:53:41,757 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7927939590075512 [2022-07-21 08:53:41,757 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 36746 transitions. [2022-07-21 08:53:41,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 36746 transitions. [2022-07-21 08:53:41,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:41,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 36746 transitions. [2022-07-21 08:53:41,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 816.5777777777778) internal successors, (36746), 45 states have internal predecessors, (36746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:41,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1030.0) internal successors, (47380), 46 states have internal predecessors, (47380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:41,816 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1030.0) internal successors, (47380), 46 states have internal predecessors, (47380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:41,817 INFO L186 Difference]: Start difference. First operand has 936 places, 859 transitions, 2007 flow. Second operand 45 states and 36746 transitions. [2022-07-21 08:53:41,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 980 places, 910 transitions, 2539 flow [2022-07-21 08:53:41,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 974 places, 910 transitions, 2499 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-21 08:53:41,830 INFO L242 Difference]: Finished difference. Result has 983 places, 884 transitions, 2285 flow [2022-07-21 08:53:41,831 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1030, PETRI_DIFFERENCE_MINUEND_FLOW=1983, PETRI_DIFFERENCE_MINUEND_PLACES=930, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=859, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=836, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2285, PETRI_PLACES=983, PETRI_TRANSITIONS=884} [2022-07-21 08:53:41,831 INFO L279 CegarLoopForPetriNet]: 911 programPoint places, 72 predicate places. [2022-07-21 08:53:41,831 INFO L495 AbstractCegarLoop]: Abstraction has has 983 places, 884 transitions, 2285 flow [2022-07-21 08:53:41,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 816.7941176470588) internal successors, (27771), 34 states have internal predecessors, (27771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:41,834 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:41,834 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:41,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-07-21 08:53:42,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-07-21 08:53:42,049 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:42,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:42,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1512921305, now seen corresponding path program 1 times [2022-07-21 08:53:42,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:42,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057873002] [2022-07-21 08:53:42,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:42,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:42,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:42,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:42,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057873002] [2022-07-21 08:53:42,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057873002] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:42,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398160441] [2022-07-21 08:53:42,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:42,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:42,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:42,354 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:53:42,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-07-21 08:53:43,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:43,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 08:53:43,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:43,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:44,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:44,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398160441] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:44,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:53:44,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-21 08:53:44,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364397907] [2022-07-21 08:53:44,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:44,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-21 08:53:44,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:44,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-21 08:53:44,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-21 08:53:44,021 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 814 out of 1030 [2022-07-21 08:53:44,037 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 983 places, 884 transitions, 2285 flow. Second operand has 66 states, 66 states have (on average 816.8939393939394) internal successors, (53915), 66 states have internal predecessors, (53915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:44,037 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:44,037 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 814 of 1030 [2022-07-21 08:53:44,037 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:46,011 INFO L129 PetriNetUnfolder]: 0/1082 cut-off events. [2022-07-21 08:53:46,011 INFO L130 PetriNetUnfolder]: For 1982/1982 co-relation queries the response was YES. [2022-07-21 08:53:46,012 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1852 conditions, 1082 events. 0/1082 cut-off events. For 1982/1982 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2737 event pairs, 0 based on Foata normal form. 15/1097 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2022-07-21 08:53:46,013 INFO L132 encePairwiseOnDemand]: 1025/1030 looper letters, 90 selfloop transitions, 88 changer transitions 0/968 dead transitions. [2022-07-21 08:53:46,013 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1059 places, 968 transitions, 3347 flow [2022-07-21 08:53:46,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-07-21 08:53:46,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2022-07-21 08:53:46,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 73453 transitions. [2022-07-21 08:53:46,046 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7923732470334413 [2022-07-21 08:53:46,046 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 73453 transitions. [2022-07-21 08:53:46,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 73453 transitions. [2022-07-21 08:53:46,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:46,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 73453 transitions. [2022-07-21 08:53:46,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 816.1444444444444) internal successors, (73453), 90 states have internal predecessors, (73453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:46,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 1030.0) internal successors, (93730), 91 states have internal predecessors, (93730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:46,169 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 1030.0) internal successors, (93730), 91 states have internal predecessors, (93730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:46,169 INFO L186 Difference]: Start difference. First operand has 983 places, 884 transitions, 2285 flow. Second operand 90 states and 73453 transitions. [2022-07-21 08:53:46,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1059 places, 968 transitions, 3347 flow [2022-07-21 08:53:46,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1026 places, 968 transitions, 3106 flow, removed 24 selfloop flow, removed 33 redundant places. [2022-07-21 08:53:46,183 INFO L242 Difference]: Finished difference. Result has 1026 places, 913 transitions, 2615 flow [2022-07-21 08:53:46,184 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1030, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=937, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=825, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=2615, PETRI_PLACES=1026, PETRI_TRANSITIONS=913} [2022-07-21 08:53:46,184 INFO L279 CegarLoopForPetriNet]: 911 programPoint places, 115 predicate places. [2022-07-21 08:53:46,184 INFO L495 AbstractCegarLoop]: Abstraction has has 1026 places, 913 transitions, 2615 flow [2022-07-21 08:53:46,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 816.8939393939394) internal successors, (53915), 66 states have internal predecessors, (53915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:46,190 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:46,190 INFO L200 CegarLoopForPetriNet]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:46,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-07-21 08:53:46,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2022-07-21 08:53:46,399 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:46,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:46,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1873476730, now seen corresponding path program 1 times [2022-07-21 08:53:46,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:46,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535513636] [2022-07-21 08:53:46,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:46,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:53:46,443 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:53:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:53:46,503 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:53:46,503 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:53:46,510 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:53:46,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:53:46,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2022-07-21 08:53:46,510 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:46,510 WARN L231 ceAbstractionStarter]: 29 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:53:46,510 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 30 thread instances. [2022-07-21 08:53:46,562 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:53:46,574 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 940 places, 1063 transitions, 3146 flow [2022-07-21 08:53:47,415 INFO L129 PetriNetUnfolder]: 304/2228 cut-off events. [2022-07-21 08:53:47,416 INFO L130 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2022-07-21 08:53:47,706 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2784 conditions, 2228 events. 304/2228 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8444 event pairs, 0 based on Foata normal form. 0/1862 useless extension candidates. Maximal degree in co-relation 2651. Up to 62 conditions per place. [2022-07-21 08:53:47,707 INFO L82 GeneralOperation]: Start removeDead. Operand has 940 places, 1063 transitions, 3146 flow [2022-07-21 08:53:47,746 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 940 places, 1063 transitions, 3146 flow [2022-07-21 08:53:47,747 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:53:47,747 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:53:47,747 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:53:47,751 INFO L129 PetriNetUnfolder]: 5/94 cut-off events. [2022-07-21 08:53:47,751 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:53:47,751 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:47,751 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] [2022-07-21 08:53:47,752 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:47,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:47,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1331891302, now seen corresponding path program 1 times [2022-07-21 08:53:47,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:47,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696618805] [2022-07-21 08:53:47,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:47,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:47,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:47,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:47,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696618805] [2022-07-21 08:53:47,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696618805] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:53:47,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:53:47,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:53:47,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893665154] [2022-07-21 08:53:47,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:53:47,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:53:47,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:47,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:53:47,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:53:47,772 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 848 out of 1063 [2022-07-21 08:53:47,772 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 940 places, 1063 transitions, 3146 flow. Second operand has 2 states, 2 states have (on average 848.5) internal successors, (1697), 2 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:47,773 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:47,773 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 848 of 1063 [2022-07-21 08:53:47,773 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:48,627 INFO L129 PetriNetUnfolder]: 0/1893 cut-off events. [2022-07-21 08:53:48,627 INFO L130 PetriNetUnfolder]: For 5395/5395 co-relation queries the response was YES. [2022-07-21 08:53:48,627 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2480 conditions, 1893 events. 0/1893 cut-off events. For 5395/5395 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8050 event pairs, 0 based on Foata normal form. 2742/4573 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-07-21 08:53:48,630 INFO L132 encePairwiseOnDemand]: 879/1063 looper letters, 30 selfloop transitions, 0 changer transitions 12/878 dead transitions. [2022-07-21 08:53:48,631 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 940 places, 878 transitions, 2836 flow [2022-07-21 08:53:48,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:53:48,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:53:48,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1910 transitions. [2022-07-21 08:53:48,632 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8984007525870179 [2022-07-21 08:53:48,632 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1910 transitions. [2022-07-21 08:53:48,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1910 transitions. [2022-07-21 08:53:48,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:48,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1910 transitions. [2022-07-21 08:53:48,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 955.0) internal successors, (1910), 2 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:48,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1063.0) internal successors, (3189), 3 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:48,635 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1063.0) internal successors, (3189), 3 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:48,635 INFO L186 Difference]: Start difference. First operand has 940 places, 1063 transitions, 3146 flow. Second operand 2 states and 1910 transitions. [2022-07-21 08:53:48,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 940 places, 878 transitions, 2836 flow [2022-07-21 08:53:48,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 940 places, 878 transitions, 1966 flow, removed 435 selfloop flow, removed 0 redundant places. [2022-07-21 08:53:48,649 INFO L242 Difference]: Finished difference. Result has 940 places, 866 transitions, 1882 flow [2022-07-21 08:53:48,649 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1063, PETRI_DIFFERENCE_MINUEND_FLOW=1906, PETRI_DIFFERENCE_MINUEND_PLACES=939, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=878, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1882, PETRI_PLACES=940, PETRI_TRANSITIONS=866} [2022-07-21 08:53:48,650 INFO L279 CegarLoopForPetriNet]: 940 programPoint places, 0 predicate places. [2022-07-21 08:53:48,650 INFO L495 AbstractCegarLoop]: Abstraction has has 940 places, 866 transitions, 1882 flow [2022-07-21 08:53:48,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 848.5) internal successors, (1697), 2 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:48,650 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:48,650 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] [2022-07-21 08:53:48,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2022-07-21 08:53:48,650 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:48,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:48,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1038488295, now seen corresponding path program 1 times [2022-07-21 08:53:48,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:48,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985778251] [2022-07-21 08:53:48,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:48,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:48,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:48,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:48,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985778251] [2022-07-21 08:53:48,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985778251] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:53:48,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:53:48,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:53:48,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615973941] [2022-07-21 08:53:48,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:53:48,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:53:48,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:48,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:53:48,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:53:48,674 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 841 out of 1063 [2022-07-21 08:53:48,675 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 940 places, 866 transitions, 1882 flow. Second operand has 3 states, 3 states have (on average 842.0) internal successors, (2526), 3 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:48,675 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:48,675 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 841 of 1063 [2022-07-21 08:53:48,675 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:49,411 INFO L129 PetriNetUnfolder]: 0/1508 cut-off events. [2022-07-21 08:53:49,412 INFO L130 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-07-21 08:53:49,412 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1815 conditions, 1508 events. 0/1508 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5351 event pairs, 0 based on Foata normal form. 0/1478 useless extension candidates. Maximal degree in co-relation 0. Up to 180 conditions per place. [2022-07-21 08:53:49,415 INFO L132 encePairwiseOnDemand]: 1060/1063 looper letters, 39 selfloop transitions, 2 changer transitions 0/870 dead transitions. [2022-07-21 08:53:49,415 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 930 places, 870 transitions, 1972 flow [2022-07-21 08:53:49,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:53:49,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:53:49,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2565 transitions. [2022-07-21 08:53:49,417 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8043273753527752 [2022-07-21 08:53:49,417 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2565 transitions. [2022-07-21 08:53:49,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2565 transitions. [2022-07-21 08:53:49,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:49,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2565 transitions. [2022-07-21 08:53:49,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 855.0) internal successors, (2565), 3 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:49,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1063.0) internal successors, (4252), 4 states have internal predecessors, (4252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:49,421 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1063.0) internal successors, (4252), 4 states have internal predecessors, (4252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:49,421 INFO L186 Difference]: Start difference. First operand has 940 places, 866 transitions, 1882 flow. Second operand 3 states and 2565 transitions. [2022-07-21 08:53:49,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 930 places, 870 transitions, 1972 flow [2022-07-21 08:53:49,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 930 places, 870 transitions, 1972 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:53:49,430 INFO L242 Difference]: Finished difference. Result has 931 places, 867 transitions, 1894 flow [2022-07-21 08:53:49,431 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1063, PETRI_DIFFERENCE_MINUEND_FLOW=1882, PETRI_DIFFERENCE_MINUEND_PLACES=928, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=866, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=864, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1894, PETRI_PLACES=931, PETRI_TRANSITIONS=867} [2022-07-21 08:53:49,431 INFO L279 CegarLoopForPetriNet]: 940 programPoint places, -9 predicate places. [2022-07-21 08:53:49,431 INFO L495 AbstractCegarLoop]: Abstraction has has 931 places, 867 transitions, 1894 flow [2022-07-21 08:53:49,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 842.0) internal successors, (2526), 3 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:49,431 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:49,432 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:49,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2022-07-21 08:53:49,432 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:49,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:49,432 INFO L85 PathProgramCache]: Analyzing trace with hash 903602880, now seen corresponding path program 1 times [2022-07-21 08:53:49,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:49,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763947787] [2022-07-21 08:53:49,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:49,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:49,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:49,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763947787] [2022-07-21 08:53:49,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763947787] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:49,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485912658] [2022-07-21 08:53:49,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:49,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:49,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:49,461 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:53:49,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-07-21 08:53:50,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:50,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:53:50,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:50,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:50,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485912658] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:50,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:53:50,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:53:50,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867375542] [2022-07-21 08:53:50,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:50,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:53:50,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:50,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:53:50,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:53:50,230 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 840 out of 1063 [2022-07-21 08:53:50,232 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 931 places, 867 transitions, 1894 flow. Second operand has 10 states, 10 states have (on average 842.3) internal successors, (8423), 10 states have internal predecessors, (8423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:50,232 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:50,232 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 840 of 1063 [2022-07-21 08:53:50,232 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:50,977 INFO L129 PetriNetUnfolder]: 0/1482 cut-off events. [2022-07-21 08:53:50,977 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-07-21 08:53:50,977 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1879 conditions, 1482 events. 0/1482 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5191 event pairs, 0 based on Foata normal form. 2/1484 useless extension candidates. Maximal degree in co-relation 0. Up to 115 conditions per place. [2022-07-21 08:53:50,980 INFO L132 encePairwiseOnDemand]: 1057/1063 looper letters, 40 selfloop transitions, 9 changer transitions 0/877 dead transitions. [2022-07-21 08:53:50,980 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 939 places, 877 transitions, 2014 flow [2022-07-21 08:53:50,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:53:50,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:53:50,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 7611 transitions. [2022-07-21 08:53:50,984 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7955471934775792 [2022-07-21 08:53:50,984 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 7611 transitions. [2022-07-21 08:53:50,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 7611 transitions. [2022-07-21 08:53:50,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:50,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 7611 transitions. [2022-07-21 08:53:50,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 845.6666666666666) internal successors, (7611), 9 states have internal predecessors, (7611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:50,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1063.0) internal successors, (10630), 10 states have internal predecessors, (10630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:50,994 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1063.0) internal successors, (10630), 10 states have internal predecessors, (10630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:50,994 INFO L186 Difference]: Start difference. First operand has 931 places, 867 transitions, 1894 flow. Second operand 9 states and 7611 transitions. [2022-07-21 08:53:50,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 939 places, 877 transitions, 2014 flow [2022-07-21 08:53:50,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 938 places, 877 transitions, 2012 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:53:51,003 INFO L242 Difference]: Finished difference. Result has 941 places, 873 transitions, 1942 flow [2022-07-21 08:53:51,004 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1063, PETRI_DIFFERENCE_MINUEND_FLOW=1892, PETRI_DIFFERENCE_MINUEND_PLACES=930, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=861, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1942, PETRI_PLACES=941, PETRI_TRANSITIONS=873} [2022-07-21 08:53:51,004 INFO L279 CegarLoopForPetriNet]: 940 programPoint places, 1 predicate places. [2022-07-21 08:53:51,004 INFO L495 AbstractCegarLoop]: Abstraction has has 941 places, 873 transitions, 1942 flow [2022-07-21 08:53:51,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 842.3) internal successors, (8423), 10 states have internal predecessors, (8423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:51,005 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:51,005 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] [2022-07-21 08:53:51,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-07-21 08:53:51,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:51,226 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:51,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:51,226 INFO L85 PathProgramCache]: Analyzing trace with hash 775653557, now seen corresponding path program 1 times [2022-07-21 08:53:51,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:51,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915986670] [2022-07-21 08:53:51,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:51,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:51,272 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:51,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:51,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915986670] [2022-07-21 08:53:51,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915986670] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:51,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926713985] [2022-07-21 08:53:51,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:51,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:51,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:51,274 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:53:51,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-07-21 08:53:51,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:51,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:53:51,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:52,026 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:52,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:52,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926713985] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:52,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:53:52,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:53:52,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944648144] [2022-07-21 08:53:52,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:52,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:53:52,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:52,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:53:52,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:53:52,106 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 840 out of 1063 [2022-07-21 08:53:52,111 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 941 places, 873 transitions, 1942 flow. Second operand has 18 states, 18 states have (on average 842.6111111111111) internal successors, (15167), 18 states have internal predecessors, (15167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:52,111 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:52,111 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 840 of 1063 [2022-07-21 08:53:52,111 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:53,042 INFO L129 PetriNetUnfolder]: 0/1430 cut-off events. [2022-07-21 08:53:53,042 INFO L130 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2022-07-21 08:53:53,042 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2048 conditions, 1430 events. 0/1430 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4851 event pairs, 0 based on Foata normal form. 4/1434 useless extension candidates. Maximal degree in co-relation 0. Up to 99 conditions per place. [2022-07-21 08:53:53,045 INFO L132 encePairwiseOnDemand]: 1057/1063 looper letters, 48 selfloop transitions, 21 changer transitions 0/897 dead transitions. [2022-07-21 08:53:53,045 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 961 places, 897 transitions, 2188 flow [2022-07-21 08:53:53,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:53:53,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:53:53,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 17713 transitions. [2022-07-21 08:53:53,053 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7934865385476862 [2022-07-21 08:53:53,054 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 17713 transitions. [2022-07-21 08:53:53,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 17713 transitions. [2022-07-21 08:53:53,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:53,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 17713 transitions. [2022-07-21 08:53:53,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 843.4761904761905) internal successors, (17713), 21 states have internal predecessors, (17713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:53,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1063.0) internal successors, (23386), 22 states have internal predecessors, (23386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:53,080 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1063.0) internal successors, (23386), 22 states have internal predecessors, (23386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:53,080 INFO L186 Difference]: Start difference. First operand has 941 places, 873 transitions, 1942 flow. Second operand 21 states and 17713 transitions. [2022-07-21 08:53:53,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 961 places, 897 transitions, 2188 flow [2022-07-21 08:53:53,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 960 places, 897 transitions, 2174 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:53:53,091 INFO L242 Difference]: Finished difference. Result has 965 places, 886 transitions, 2066 flow [2022-07-21 08:53:53,091 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1063, PETRI_DIFFERENCE_MINUEND_FLOW=1936, PETRI_DIFFERENCE_MINUEND_PLACES=940, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=862, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2066, PETRI_PLACES=965, PETRI_TRANSITIONS=886} [2022-07-21 08:53:53,092 INFO L279 CegarLoopForPetriNet]: 940 programPoint places, 25 predicate places. [2022-07-21 08:53:53,092 INFO L495 AbstractCegarLoop]: Abstraction has has 965 places, 886 transitions, 2066 flow [2022-07-21 08:53:53,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 842.6111111111111) internal successors, (15167), 18 states have internal predecessors, (15167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:53,093 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:53,093 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:53,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-07-21 08:53:53,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:53,308 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:53,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:53,308 INFO L85 PathProgramCache]: Analyzing trace with hash 286763691, now seen corresponding path program 1 times [2022-07-21 08:53:53,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:53,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430844577] [2022-07-21 08:53:53,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:53,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:53,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:53,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:53,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430844577] [2022-07-21 08:53:53,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430844577] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:53,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370081252] [2022-07-21 08:53:53,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:53,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:53,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:53,401 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:53:53,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-07-21 08:53:54,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:54,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:53:54,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:54,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:54,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370081252] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:54,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:53:54,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:53:54,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490252390] [2022-07-21 08:53:54,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:54,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:53:54,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:54,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:53:54,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:53:54,433 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 840 out of 1063 [2022-07-21 08:53:54,441 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 965 places, 886 transitions, 2066 flow. Second operand has 34 states, 34 states have (on average 842.7941176470588) internal successors, (28655), 34 states have internal predecessors, (28655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:54,442 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:54,442 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 840 of 1063 [2022-07-21 08:53:54,442 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:55,597 INFO L129 PetriNetUnfolder]: 0/1326 cut-off events. [2022-07-21 08:53:55,598 INFO L130 PetriNetUnfolder]: For 681/681 co-relation queries the response was YES. [2022-07-21 08:53:55,598 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2122 conditions, 1326 events. 0/1326 cut-off events. For 681/681 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4170 event pairs, 0 based on Foata normal form. 8/1334 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2022-07-21 08:53:55,600 INFO L132 encePairwiseOnDemand]: 1057/1063 looper letters, 64 selfloop transitions, 45 changer transitions 0/937 dead transitions. [2022-07-21 08:53:55,600 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1009 places, 937 transitions, 2600 flow [2022-07-21 08:53:55,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 08:53:55,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-21 08:53:55,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 37917 transitions. [2022-07-21 08:53:55,616 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7926622765757291 [2022-07-21 08:53:55,616 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 37917 transitions. [2022-07-21 08:53:55,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 37917 transitions. [2022-07-21 08:53:55,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:55,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 37917 transitions. [2022-07-21 08:53:55,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 842.6) internal successors, (37917), 45 states have internal predecessors, (37917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:55,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1063.0) internal successors, (48898), 46 states have internal predecessors, (48898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:55,674 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1063.0) internal successors, (48898), 46 states have internal predecessors, (48898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:55,675 INFO L186 Difference]: Start difference. First operand has 965 places, 886 transitions, 2066 flow. Second operand 45 states and 37917 transitions. [2022-07-21 08:53:55,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1009 places, 937 transitions, 2600 flow [2022-07-21 08:53:55,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1003 places, 937 transitions, 2560 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-21 08:53:55,686 INFO L242 Difference]: Finished difference. Result has 1012 places, 911 transitions, 2344 flow [2022-07-21 08:53:55,687 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1063, PETRI_DIFFERENCE_MINUEND_FLOW=2042, PETRI_DIFFERENCE_MINUEND_PLACES=959, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=886, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=863, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2344, PETRI_PLACES=1012, PETRI_TRANSITIONS=911} [2022-07-21 08:53:55,687 INFO L279 CegarLoopForPetriNet]: 940 programPoint places, 72 predicate places. [2022-07-21 08:53:55,687 INFO L495 AbstractCegarLoop]: Abstraction has has 1012 places, 911 transitions, 2344 flow [2022-07-21 08:53:55,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 842.7941176470588) internal successors, (28655), 34 states have internal predecessors, (28655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:55,690 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:55,690 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:55,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-07-21 08:53:55,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:55,897 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:53:55,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:55,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1745244473, now seen corresponding path program 1 times [2022-07-21 08:53:55,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:55,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663660653] [2022-07-21 08:53:55,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:55,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:55,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:56,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:56,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663660653] [2022-07-21 08:53:56,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663660653] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:56,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633072366] [2022-07-21 08:53:56,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:56,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:56,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:56,218 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:53:56,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-07-21 08:53:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:57,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 08:53:57,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:57,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:57,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633072366] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:57,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:53:57,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-21 08:53:57,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156365678] [2022-07-21 08:53:57,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:57,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-21 08:53:57,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:57,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-21 08:53:57,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-21 08:53:57,951 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 840 out of 1063 [2022-07-21 08:53:57,967 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1012 places, 911 transitions, 2344 flow. Second operand has 66 states, 66 states have (on average 842.8939393939394) internal successors, (55631), 66 states have internal predecessors, (55631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:57,967 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:57,967 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 840 of 1063 [2022-07-21 08:53:57,968 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:00,128 INFO L129 PetriNetUnfolder]: 0/1118 cut-off events. [2022-07-21 08:54:00,129 INFO L130 PetriNetUnfolder]: For 2103/2103 co-relation queries the response was YES. [2022-07-21 08:54:00,129 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1915 conditions, 1118 events. 0/1118 cut-off events. For 2103/2103 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2835 event pairs, 0 based on Foata normal form. 16/1134 useless extension candidates. Maximal degree in co-relation 0. Up to 56 conditions per place. [2022-07-21 08:54:00,131 INFO L132 encePairwiseOnDemand]: 1058/1063 looper letters, 93 selfloop transitions, 91 changer transitions 0/1000 dead transitions. [2022-07-21 08:54:00,131 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1091 places, 1000 transitions, 3462 flow [2022-07-21 08:54:00,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-21 08:54:00,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-21 08:54:00,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 78320 transitions. [2022-07-21 08:54:00,164 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7922394521490204 [2022-07-21 08:54:00,165 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 78320 transitions. [2022-07-21 08:54:00,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 78320 transitions. [2022-07-21 08:54:00,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:00,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 78320 transitions. [2022-07-21 08:54:00,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 842.1505376344086) internal successors, (78320), 93 states have internal predecessors, (78320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:00,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1063.0) internal successors, (99922), 94 states have internal predecessors, (99922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:00,293 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1063.0) internal successors, (99922), 94 states have internal predecessors, (99922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:00,294 INFO L186 Difference]: Start difference. First operand has 1012 places, 911 transitions, 2344 flow. Second operand 93 states and 78320 transitions. [2022-07-21 08:54:00,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1091 places, 1000 transitions, 3462 flow [2022-07-21 08:54:00,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1058 places, 1000 transitions, 3213 flow, removed 25 selfloop flow, removed 33 redundant places. [2022-07-21 08:54:00,309 INFO L242 Difference]: Finished difference. Result has 1058 places, 943 transitions, 2703 flow [2022-07-21 08:54:00,309 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1063, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=966, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=898, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=852, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=2703, PETRI_PLACES=1058, PETRI_TRANSITIONS=943} [2022-07-21 08:54:00,309 INFO L279 CegarLoopForPetriNet]: 940 programPoint places, 118 predicate places. [2022-07-21 08:54:00,310 INFO L495 AbstractCegarLoop]: Abstraction has has 1058 places, 943 transitions, 2703 flow [2022-07-21 08:54:00,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 842.8939393939394) internal successors, (55631), 66 states have internal predecessors, (55631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:00,315 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:00,315 INFO L200 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:00,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-07-21 08:54:00,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-07-21 08:54:00,536 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:54:00,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:00,536 INFO L85 PathProgramCache]: Analyzing trace with hash -368607812, now seen corresponding path program 1 times [2022-07-21 08:54:00,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:00,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290259029] [2022-07-21 08:54:00,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:00,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:54:00,576 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:54:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:54:00,639 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:54:00,639 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:54:00,639 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:54:00,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:54:00,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2022-07-21 08:54:00,640 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:00,640 WARN L231 ceAbstractionStarter]: 30 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:54:00,640 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 31 thread instances. [2022-07-21 08:54:00,689 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:54:00,694 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 969 places, 1096 transitions, 3277 flow [2022-07-21 08:54:01,598 INFO L129 PetriNetUnfolder]: 314/2300 cut-off events. [2022-07-21 08:54:01,598 INFO L130 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2022-07-21 08:54:01,770 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2890 conditions, 2300 events. 314/2300 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8760 event pairs, 0 based on Foata normal form. 0/1922 useless extension candidates. Maximal degree in co-relation 2756. Up to 64 conditions per place. [2022-07-21 08:54:01,770 INFO L82 GeneralOperation]: Start removeDead. Operand has 969 places, 1096 transitions, 3277 flow [2022-07-21 08:54:01,840 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 969 places, 1096 transitions, 3277 flow [2022-07-21 08:54:01,841 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:54:01,841 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:54:01,841 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:54:01,844 INFO L129 PetriNetUnfolder]: 4/88 cut-off events. [2022-07-21 08:54:01,844 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:54:01,845 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:01,845 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] [2022-07-21 08:54:01,845 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:54:01,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:01,845 INFO L85 PathProgramCache]: Analyzing trace with hash 601694695, now seen corresponding path program 1 times [2022-07-21 08:54:01,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:01,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405634780] [2022-07-21 08:54:01,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:01,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:01,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:01,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:01,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:01,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405634780] [2022-07-21 08:54:01,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405634780] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:54:01,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:54:01,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:54:01,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158180806] [2022-07-21 08:54:01,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:54:01,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:54:01,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:01,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:54:01,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:54:01,869 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 867 out of 1096 [2022-07-21 08:54:01,869 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 969 places, 1096 transitions, 3277 flow. Second operand has 3 states, 3 states have (on average 868.0) internal successors, (2604), 3 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:01,869 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:01,870 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 867 of 1096 [2022-07-21 08:54:01,870 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:02,946 INFO L129 PetriNetUnfolder]: 0/1929 cut-off events. [2022-07-21 08:54:02,946 INFO L130 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2022-07-21 08:54:02,947 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2710 conditions, 1929 events. 0/1929 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8200 event pairs, 0 based on Foata normal form. 16734/18601 useless extension candidates. Maximal degree in co-relation 0. Up to 186 conditions per place. [2022-07-21 08:54:02,950 INFO L132 encePairwiseOnDemand]: 903/1096 looper letters, 40 selfloop transitions, 2 changer transitions 12/909 dead transitions. [2022-07-21 08:54:02,950 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 970 places, 909 transitions, 2987 flow [2022-07-21 08:54:02,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:54:02,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:54:02,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2841 transitions. [2022-07-21 08:54:02,952 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8640510948905109 [2022-07-21 08:54:02,952 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2841 transitions. [2022-07-21 08:54:02,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2841 transitions. [2022-07-21 08:54:02,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:02,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2841 transitions. [2022-07-21 08:54:02,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 947.0) internal successors, (2841), 3 states have internal predecessors, (2841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:02,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1096.0) internal successors, (4384), 4 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:02,957 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1096.0) internal successors, (4384), 4 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:02,957 INFO L186 Difference]: Start difference. First operand has 969 places, 1096 transitions, 3277 flow. Second operand 3 states and 2841 transitions. [2022-07-21 08:54:02,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 970 places, 909 transitions, 2987 flow [2022-07-21 08:54:02,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 970 places, 909 transitions, 2057 flow, removed 465 selfloop flow, removed 0 redundant places. [2022-07-21 08:54:02,973 INFO L242 Difference]: Finished difference. Result has 971 places, 894 transitions, 1953 flow [2022-07-21 08:54:02,974 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1096, PETRI_DIFFERENCE_MINUEND_FLOW=1965, PETRI_DIFFERENCE_MINUEND_PLACES=968, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=905, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=903, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1953, PETRI_PLACES=971, PETRI_TRANSITIONS=894} [2022-07-21 08:54:02,974 INFO L279 CegarLoopForPetriNet]: 969 programPoint places, 2 predicate places. [2022-07-21 08:54:02,974 INFO L495 AbstractCegarLoop]: Abstraction has has 971 places, 894 transitions, 1953 flow [2022-07-21 08:54:02,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 868.0) internal successors, (2604), 3 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:02,975 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:02,975 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:02,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2022-07-21 08:54:02,975 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:54:02,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:02,975 INFO L85 PathProgramCache]: Analyzing trace with hash -796092704, now seen corresponding path program 1 times [2022-07-21 08:54:02,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:02,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534042984] [2022-07-21 08:54:02,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:02,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:02,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:03,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:03,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534042984] [2022-07-21 08:54:03,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534042984] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:03,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312828625] [2022-07-21 08:54:03,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:03,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:03,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:54:03,006 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:54:03,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-07-21 08:54:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:03,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:54:03,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:54:03,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:03,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:54:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:03,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312828625] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:54:03,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:54:03,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:54:03,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655102044] [2022-07-21 08:54:03,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:54:03,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:54:03,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:03,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:54:03,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:54:03,955 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 866 out of 1096 [2022-07-21 08:54:03,957 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 971 places, 894 transitions, 1953 flow. Second operand has 10 states, 10 states have (on average 868.3) internal successors, (8683), 10 states have internal predecessors, (8683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:03,957 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:03,958 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 866 of 1096 [2022-07-21 08:54:03,958 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:04,783 INFO L129 PetriNetUnfolder]: 0/1531 cut-off events. [2022-07-21 08:54:04,783 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-07-21 08:54:04,784 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1940 conditions, 1531 events. 0/1531 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5374 event pairs, 0 based on Foata normal form. 2/1533 useless extension candidates. Maximal degree in co-relation 0. Up to 119 conditions per place. [2022-07-21 08:54:04,786 INFO L132 encePairwiseOnDemand]: 1090/1096 looper letters, 41 selfloop transitions, 9 changer transitions 0/904 dead transitions. [2022-07-21 08:54:04,786 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 967 places, 904 transitions, 2075 flow [2022-07-21 08:54:04,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:54:04,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:54:04,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 7846 transitions. [2022-07-21 08:54:04,790 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7954176804541768 [2022-07-21 08:54:04,790 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 7846 transitions. [2022-07-21 08:54:04,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 7846 transitions. [2022-07-21 08:54:04,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:04,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 7846 transitions. [2022-07-21 08:54:04,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 871.7777777777778) internal successors, (7846), 9 states have internal predecessors, (7846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:04,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1096.0) internal successors, (10960), 10 states have internal predecessors, (10960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:04,801 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1096.0) internal successors, (10960), 10 states have internal predecessors, (10960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:04,801 INFO L186 Difference]: Start difference. First operand has 971 places, 894 transitions, 1953 flow. Second operand 9 states and 7846 transitions. [2022-07-21 08:54:04,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 967 places, 904 transitions, 2075 flow [2022-07-21 08:54:04,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 966 places, 904 transitions, 2073 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:54:04,810 INFO L242 Difference]: Finished difference. Result has 969 places, 900 transitions, 2001 flow [2022-07-21 08:54:04,811 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1096, PETRI_DIFFERENCE_MINUEND_FLOW=1951, PETRI_DIFFERENCE_MINUEND_PLACES=958, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=894, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=888, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2001, PETRI_PLACES=969, PETRI_TRANSITIONS=900} [2022-07-21 08:54:04,811 INFO L279 CegarLoopForPetriNet]: 969 programPoint places, 0 predicate places. [2022-07-21 08:54:04,812 INFO L495 AbstractCegarLoop]: Abstraction has has 969 places, 900 transitions, 2001 flow [2022-07-21 08:54:04,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 868.3) internal successors, (8683), 10 states have internal predecessors, (8683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:04,813 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:04,813 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] [2022-07-21 08:54:04,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-07-21 08:54:05,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-07-21 08:54:05,035 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:54:05,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:05,035 INFO L85 PathProgramCache]: Analyzing trace with hash -171585771, now seen corresponding path program 1 times [2022-07-21 08:54:05,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:05,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78415474] [2022-07-21 08:54:05,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:05,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:05,080 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:05,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:05,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78415474] [2022-07-21 08:54:05,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78415474] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:05,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198958964] [2022-07-21 08:54:05,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:05,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:05,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:54:05,083 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:54:05,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-07-21 08:54:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:05,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:54:05,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:54:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:05,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:54:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:05,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198958964] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:54:05,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:54:05,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:54:05,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432057313] [2022-07-21 08:54:05,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:54:05,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:54:05,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:05,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:54:05,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:54:05,922 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 866 out of 1096 [2022-07-21 08:54:05,926 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 969 places, 900 transitions, 2001 flow. Second operand has 18 states, 18 states have (on average 868.6111111111111) internal successors, (15635), 18 states have internal predecessors, (15635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:05,926 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:05,927 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 866 of 1096 [2022-07-21 08:54:05,927 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:06,815 INFO L129 PetriNetUnfolder]: 0/1479 cut-off events. [2022-07-21 08:54:06,815 INFO L130 PetriNetUnfolder]: For 180/180 co-relation queries the response was YES. [2022-07-21 08:54:06,816 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2117 conditions, 1479 events. 0/1479 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5042 event pairs, 0 based on Foata normal form. 4/1483 useless extension candidates. Maximal degree in co-relation 0. Up to 103 conditions per place. [2022-07-21 08:54:06,818 INFO L132 encePairwiseOnDemand]: 1090/1096 looper letters, 49 selfloop transitions, 21 changer transitions 0/924 dead transitions. [2022-07-21 08:54:06,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 989 places, 924 transitions, 2249 flow [2022-07-21 08:54:06,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:54:06,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:54:06,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 18260 transitions. [2022-07-21 08:54:06,827 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7933611400764685 [2022-07-21 08:54:06,827 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 18260 transitions. [2022-07-21 08:54:06,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 18260 transitions. [2022-07-21 08:54:06,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:06,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 18260 transitions. [2022-07-21 08:54:06,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 869.5238095238095) internal successors, (18260), 21 states have internal predecessors, (18260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:06,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1096.0) internal successors, (24112), 22 states have internal predecessors, (24112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:06,853 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1096.0) internal successors, (24112), 22 states have internal predecessors, (24112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:06,853 INFO L186 Difference]: Start difference. First operand has 969 places, 900 transitions, 2001 flow. Second operand 21 states and 18260 transitions. [2022-07-21 08:54:06,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 989 places, 924 transitions, 2249 flow [2022-07-21 08:54:06,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 988 places, 924 transitions, 2235 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:54:06,864 INFO L242 Difference]: Finished difference. Result has 993 places, 913 transitions, 2125 flow [2022-07-21 08:54:06,865 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1096, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=968, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=900, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=889, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2125, PETRI_PLACES=993, PETRI_TRANSITIONS=913} [2022-07-21 08:54:06,865 INFO L279 CegarLoopForPetriNet]: 969 programPoint places, 24 predicate places. [2022-07-21 08:54:06,865 INFO L495 AbstractCegarLoop]: Abstraction has has 993 places, 913 transitions, 2125 flow [2022-07-21 08:54:06,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 868.6111111111111) internal successors, (15635), 18 states have internal predecessors, (15635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:06,866 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:06,866 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:06,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-07-21 08:54:07,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:07,079 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:54:07,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:07,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1582942837, now seen corresponding path program 1 times [2022-07-21 08:54:07,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:07,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798107996] [2022-07-21 08:54:07,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:07,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:07,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:07,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798107996] [2022-07-21 08:54:07,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798107996] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:07,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805096538] [2022-07-21 08:54:07,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:07,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:07,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:54:07,174 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:54:07,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-07-21 08:54:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:07,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:54:07,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:54:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:08,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:54:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:08,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805096538] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:54:08,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:54:08,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:54:08,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809293551] [2022-07-21 08:54:08,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:54:08,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:54:08,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:08,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:54:08,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:54:08,207 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 866 out of 1096 [2022-07-21 08:54:08,215 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 993 places, 913 transitions, 2125 flow. Second operand has 34 states, 34 states have (on average 868.7941176470588) internal successors, (29539), 34 states have internal predecessors, (29539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:08,215 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:08,215 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 866 of 1096 [2022-07-21 08:54:08,216 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:09,319 INFO L129 PetriNetUnfolder]: 0/1375 cut-off events. [2022-07-21 08:54:09,320 INFO L130 PetriNetUnfolder]: For 708/708 co-relation queries the response was YES. [2022-07-21 08:54:09,320 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2200 conditions, 1375 events. 0/1375 cut-off events. For 708/708 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4351 event pairs, 0 based on Foata normal form. 8/1383 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2022-07-21 08:54:09,322 INFO L132 encePairwiseOnDemand]: 1090/1096 looper letters, 65 selfloop transitions, 45 changer transitions 0/964 dead transitions. [2022-07-21 08:54:09,323 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1037 places, 964 transitions, 2661 flow [2022-07-21 08:54:09,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 08:54:09,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-21 08:54:09,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 39088 transitions. [2022-07-21 08:54:09,340 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7925385239253853 [2022-07-21 08:54:09,340 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 39088 transitions. [2022-07-21 08:54:09,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 39088 transitions. [2022-07-21 08:54:09,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:09,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 39088 transitions. [2022-07-21 08:54:09,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 868.6222222222223) internal successors, (39088), 45 states have internal predecessors, (39088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:09,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1096.0) internal successors, (50416), 46 states have internal predecessors, (50416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:09,402 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1096.0) internal successors, (50416), 46 states have internal predecessors, (50416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:09,402 INFO L186 Difference]: Start difference. First operand has 993 places, 913 transitions, 2125 flow. Second operand 45 states and 39088 transitions. [2022-07-21 08:54:09,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1037 places, 964 transitions, 2661 flow [2022-07-21 08:54:09,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1031 places, 964 transitions, 2621 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-21 08:54:09,414 INFO L242 Difference]: Finished difference. Result has 1040 places, 938 transitions, 2403 flow [2022-07-21 08:54:09,414 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1096, PETRI_DIFFERENCE_MINUEND_FLOW=2101, PETRI_DIFFERENCE_MINUEND_PLACES=987, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=913, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=890, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2403, PETRI_PLACES=1040, PETRI_TRANSITIONS=938} [2022-07-21 08:54:09,415 INFO L279 CegarLoopForPetriNet]: 969 programPoint places, 71 predicate places. [2022-07-21 08:54:09,415 INFO L495 AbstractCegarLoop]: Abstraction has has 1040 places, 938 transitions, 2403 flow [2022-07-21 08:54:09,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 868.7941176470588) internal successors, (29539), 34 states have internal predecessors, (29539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:09,418 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:09,418 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:09,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-07-21 08:54:09,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:09,639 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:54:09,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:09,639 INFO L85 PathProgramCache]: Analyzing trace with hash 294994599, now seen corresponding path program 1 times [2022-07-21 08:54:09,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:09,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454325966] [2022-07-21 08:54:09,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:09,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:09,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:09,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:09,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454325966] [2022-07-21 08:54:09,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454325966] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:09,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88766534] [2022-07-21 08:54:09,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:09,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:09,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:54:09,952 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:54:09,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-07-21 08:54:10,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:10,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 08:54:10,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:54:10,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:10,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:54:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:11,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88766534] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:54:11,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:54:11,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-21 08:54:11,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043687531] [2022-07-21 08:54:11,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:54:11,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-21 08:54:11,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:11,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-21 08:54:11,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-21 08:54:11,665 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 866 out of 1096 [2022-07-21 08:54:11,681 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1040 places, 938 transitions, 2403 flow. Second operand has 66 states, 66 states have (on average 868.8939393939394) internal successors, (57347), 66 states have internal predecessors, (57347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:11,682 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:11,682 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 866 of 1096 [2022-07-21 08:54:11,682 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:13,763 INFO L129 PetriNetUnfolder]: 0/1167 cut-off events. [2022-07-21 08:54:13,763 INFO L130 PetriNetUnfolder]: For 2224/2224 co-relation queries the response was YES. [2022-07-21 08:54:13,763 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2006 conditions, 1167 events. 0/1167 cut-off events. For 2224/2224 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2991 event pairs, 0 based on Foata normal form. 16/1183 useless extension candidates. Maximal degree in co-relation 0. Up to 58 conditions per place. [2022-07-21 08:54:13,765 INFO L132 encePairwiseOnDemand]: 1090/1096 looper letters, 97 selfloop transitions, 93 changer transitions 0/1044 dead transitions. [2022-07-21 08:54:13,765 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1132 places, 1044 transitions, 3631 flow [2022-07-21 08:54:13,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-21 08:54:13,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-21 08:54:13,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 80744 transitions. [2022-07-21 08:54:13,799 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7921670198571541 [2022-07-21 08:54:13,800 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 80744 transitions. [2022-07-21 08:54:13,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 80744 transitions. [2022-07-21 08:54:13,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:13,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 80744 transitions. [2022-07-21 08:54:13,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 868.2150537634409) internal successors, (80744), 93 states have internal predecessors, (80744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:14,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1096.0) internal successors, (103024), 94 states have internal predecessors, (103024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:14,047 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1096.0) internal successors, (103024), 94 states have internal predecessors, (103024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:14,047 INFO L186 Difference]: Start difference. First operand has 1040 places, 938 transitions, 2403 flow. Second operand 93 states and 80744 transitions. [2022-07-21 08:54:14,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1132 places, 1044 transitions, 3631 flow [2022-07-21 08:54:14,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1114 places, 1044 transitions, 3543 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-07-21 08:54:14,061 INFO L242 Difference]: Finished difference. Result has 1131 places, 987 transitions, 3037 flow [2022-07-21 08:54:14,062 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1096, PETRI_DIFFERENCE_MINUEND_FLOW=2347, PETRI_DIFFERENCE_MINUEND_PLACES=1022, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=891, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3037, PETRI_PLACES=1131, PETRI_TRANSITIONS=987} [2022-07-21 08:54:14,062 INFO L279 CegarLoopForPetriNet]: 969 programPoint places, 162 predicate places. [2022-07-21 08:54:14,062 INFO L495 AbstractCegarLoop]: Abstraction has has 1131 places, 987 transitions, 3037 flow [2022-07-21 08:54:14,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 868.8939393939394) internal successors, (57347), 66 states have internal predecessors, (57347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:14,068 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:14,068 INFO L200 CegarLoopForPetriNet]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:14,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-07-21 08:54:14,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-07-21 08:54:14,289 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:54:14,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:14,290 INFO L85 PathProgramCache]: Analyzing trace with hash 323483123, now seen corresponding path program 1 times [2022-07-21 08:54:14,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:14,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069789042] [2022-07-21 08:54:14,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:14,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:54:14,330 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:54:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:54:14,393 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:54:14,394 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:54:14,394 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:54:14,394 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:54:14,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2022-07-21 08:54:14,394 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 08:54:14,395 WARN L231 ceAbstractionStarter]: 31 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:54:14,395 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 32 thread instances. [2022-07-21 08:54:14,445 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:54:14,450 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 998 places, 1129 transitions, 3410 flow [2022-07-21 08:54:15,394 INFO L129 PetriNetUnfolder]: 324/2372 cut-off events. [2022-07-21 08:54:15,394 INFO L130 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2022-07-21 08:54:15,588 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2997 conditions, 2372 events. 324/2372 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 9000 event pairs, 0 based on Foata normal form. 0/1982 useless extension candidates. Maximal degree in co-relation 2862. Up to 66 conditions per place. [2022-07-21 08:54:15,588 INFO L82 GeneralOperation]: Start removeDead. Operand has 998 places, 1129 transitions, 3410 flow [2022-07-21 08:54:15,670 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 998 places, 1129 transitions, 3410 flow [2022-07-21 08:54:15,671 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:54:15,671 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:54:15,671 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:54:15,675 INFO L129 PetriNetUnfolder]: 5/91 cut-off events. [2022-07-21 08:54:15,675 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:54:15,675 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:15,675 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] [2022-07-21 08:54:15,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:54:15,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:15,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1903437767, now seen corresponding path program 1 times [2022-07-21 08:54:15,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:15,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359120923] [2022-07-21 08:54:15,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:15,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:15,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:15,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:15,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359120923] [2022-07-21 08:54:15,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359120923] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:54:15,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:54:15,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:54:15,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915673289] [2022-07-21 08:54:15,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:54:15,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:54:15,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:15,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:54:15,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:54:15,699 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 893 out of 1129 [2022-07-21 08:54:15,700 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 998 places, 1129 transitions, 3410 flow. Second operand has 3 states, 3 states have (on average 894.0) internal successors, (2682), 3 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:15,700 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:15,700 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 893 of 1129 [2022-07-21 08:54:15,700 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:16,787 INFO L129 PetriNetUnfolder]: 0/1990 cut-off events. [2022-07-21 08:54:16,787 INFO L130 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2022-07-21 08:54:16,788 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2812 conditions, 1990 events. 0/1990 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8506 event pairs, 0 based on Foata normal form. 17849/19775 useless extension candidates. Maximal degree in co-relation 0. Up to 192 conditions per place. [2022-07-21 08:54:16,790 INFO L132 encePairwiseOnDemand]: 930/1129 looper letters, 41 selfloop transitions, 2 changer transitions 12/936 dead transitions. [2022-07-21 08:54:16,791 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 999 places, 936 transitions, 3110 flow [2022-07-21 08:54:16,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:54:16,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:54:16,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2926 transitions. [2022-07-21 08:54:16,793 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.863891349276646 [2022-07-21 08:54:16,793 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2926 transitions. [2022-07-21 08:54:16,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2926 transitions. [2022-07-21 08:54:16,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:16,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2926 transitions. [2022-07-21 08:54:16,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 975.3333333333334) internal successors, (2926), 3 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:16,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:16,797 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:16,797 INFO L186 Difference]: Start difference. First operand has 998 places, 1129 transitions, 3410 flow. Second operand 3 states and 2926 transitions. [2022-07-21 08:54:16,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 999 places, 936 transitions, 3110 flow [2022-07-21 08:54:16,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 999 places, 936 transitions, 2118 flow, removed 496 selfloop flow, removed 0 redundant places. [2022-07-21 08:54:16,813 INFO L242 Difference]: Finished difference. Result has 1000 places, 921 transitions, 2012 flow [2022-07-21 08:54:16,813 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=2024, PETRI_DIFFERENCE_MINUEND_PLACES=997, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=932, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=930, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2012, PETRI_PLACES=1000, PETRI_TRANSITIONS=921} [2022-07-21 08:54:16,814 INFO L279 CegarLoopForPetriNet]: 998 programPoint places, 2 predicate places. [2022-07-21 08:54:16,814 INFO L495 AbstractCegarLoop]: Abstraction has has 1000 places, 921 transitions, 2012 flow [2022-07-21 08:54:16,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 894.0) internal successors, (2682), 3 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:16,814 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:16,814 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:16,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2022-07-21 08:54:16,814 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:54:16,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:16,815 INFO L85 PathProgramCache]: Analyzing trace with hash 774696576, now seen corresponding path program 1 times [2022-07-21 08:54:16,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:16,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062890422] [2022-07-21 08:54:16,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:16,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:16,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:16,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:16,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062890422] [2022-07-21 08:54:16,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062890422] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:16,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217428538] [2022-07-21 08:54:16,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:16,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:16,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:54:16,843 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:54:16,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-07-21 08:54:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:17,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:54:17,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:54:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:17,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:54:17,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:17,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217428538] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:54:17,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:54:17,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:54:17,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817066307] [2022-07-21 08:54:17,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:54:17,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:54:17,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:17,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:54:17,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:54:17,715 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 892 out of 1129 [2022-07-21 08:54:17,717 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1000 places, 921 transitions, 2012 flow. Second operand has 10 states, 10 states have (on average 894.3) internal successors, (8943), 10 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:17,717 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:17,717 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 892 of 1129 [2022-07-21 08:54:17,717 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:18,568 INFO L129 PetriNetUnfolder]: 0/1580 cut-off events. [2022-07-21 08:54:18,568 INFO L130 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-07-21 08:54:18,569 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2002 conditions, 1580 events. 0/1580 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5561 event pairs, 0 based on Foata normal form. 2/1582 useless extension candidates. Maximal degree in co-relation 0. Up to 123 conditions per place. [2022-07-21 08:54:18,572 INFO L132 encePairwiseOnDemand]: 1123/1129 looper letters, 42 selfloop transitions, 9 changer transitions 0/931 dead transitions. [2022-07-21 08:54:18,572 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 996 places, 931 transitions, 2136 flow [2022-07-21 08:54:18,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:54:18,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:54:18,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8081 transitions. [2022-07-21 08:54:18,576 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7952957386084046 [2022-07-21 08:54:18,576 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8081 transitions. [2022-07-21 08:54:18,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8081 transitions. [2022-07-21 08:54:18,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:18,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8081 transitions. [2022-07-21 08:54:18,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 897.8888888888889) internal successors, (8081), 9 states have internal predecessors, (8081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:18,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1129.0) internal successors, (11290), 10 states have internal predecessors, (11290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:18,586 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1129.0) internal successors, (11290), 10 states have internal predecessors, (11290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:18,587 INFO L186 Difference]: Start difference. First operand has 1000 places, 921 transitions, 2012 flow. Second operand 9 states and 8081 transitions. [2022-07-21 08:54:18,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 996 places, 931 transitions, 2136 flow [2022-07-21 08:54:18,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 995 places, 931 transitions, 2134 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:54:18,596 INFO L242 Difference]: Finished difference. Result has 998 places, 927 transitions, 2060 flow [2022-07-21 08:54:18,597 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=2010, PETRI_DIFFERENCE_MINUEND_PLACES=987, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=921, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=915, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2060, PETRI_PLACES=998, PETRI_TRANSITIONS=927} [2022-07-21 08:54:18,597 INFO L279 CegarLoopForPetriNet]: 998 programPoint places, 0 predicate places. [2022-07-21 08:54:18,597 INFO L495 AbstractCegarLoop]: Abstraction has has 998 places, 927 transitions, 2060 flow [2022-07-21 08:54:18,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 894.3) internal successors, (8943), 10 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:18,598 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:18,598 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] [2022-07-21 08:54:18,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-07-21 08:54:18,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:18,799 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:54:18,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:18,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1043544629, now seen corresponding path program 1 times [2022-07-21 08:54:18,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:18,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566680704] [2022-07-21 08:54:18,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:18,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:18,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:18,846 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:18,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:18,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566680704] [2022-07-21 08:54:18,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566680704] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:18,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289068237] [2022-07-21 08:54:18,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:18,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:18,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:54:18,848 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:54:18,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-07-21 08:54:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:19,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:54:19,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:54:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:19,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:54:19,792 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:19,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289068237] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:54:19,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:54:19,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:54:19,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453302433] [2022-07-21 08:54:19,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:54:19,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:54:19,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:19,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:54:19,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:54:19,799 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 892 out of 1129 [2022-07-21 08:54:19,803 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 998 places, 927 transitions, 2060 flow. Second operand has 18 states, 18 states have (on average 894.6111111111111) internal successors, (16103), 18 states have internal predecessors, (16103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:19,803 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:19,803 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 892 of 1129 [2022-07-21 08:54:19,803 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:20,800 INFO L129 PetriNetUnfolder]: 0/1528 cut-off events. [2022-07-21 08:54:20,800 INFO L130 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2022-07-21 08:54:20,801 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2187 conditions, 1528 events. 0/1528 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5223 event pairs, 0 based on Foata normal form. 4/1532 useless extension candidates. Maximal degree in co-relation 0. Up to 107 conditions per place. [2022-07-21 08:54:20,803 INFO L132 encePairwiseOnDemand]: 1123/1129 looper letters, 50 selfloop transitions, 21 changer transitions 0/951 dead transitions. [2022-07-21 08:54:20,803 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1018 places, 951 transitions, 2310 flow [2022-07-21 08:54:20,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:54:20,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:54:20,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 18807 transitions. [2022-07-21 08:54:20,811 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.793243072251044 [2022-07-21 08:54:20,811 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 18807 transitions. [2022-07-21 08:54:20,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 18807 transitions. [2022-07-21 08:54:20,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:20,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 18807 transitions. [2022-07-21 08:54:20,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 895.5714285714286) internal successors, (18807), 21 states have internal predecessors, (18807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:20,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1129.0) internal successors, (24838), 22 states have internal predecessors, (24838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:20,841 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1129.0) internal successors, (24838), 22 states have internal predecessors, (24838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:20,841 INFO L186 Difference]: Start difference. First operand has 998 places, 927 transitions, 2060 flow. Second operand 21 states and 18807 transitions. [2022-07-21 08:54:20,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1018 places, 951 transitions, 2310 flow [2022-07-21 08:54:20,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1017 places, 951 transitions, 2296 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:54:20,851 INFO L242 Difference]: Finished difference. Result has 1022 places, 940 transitions, 2184 flow [2022-07-21 08:54:20,851 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=997, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=927, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=916, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2184, PETRI_PLACES=1022, PETRI_TRANSITIONS=940} [2022-07-21 08:54:20,852 INFO L279 CegarLoopForPetriNet]: 998 programPoint places, 24 predicate places. [2022-07-21 08:54:20,852 INFO L495 AbstractCegarLoop]: Abstraction has has 1022 places, 940 transitions, 2184 flow [2022-07-21 08:54:20,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 894.6111111111111) internal successors, (16103), 18 states have internal predecessors, (16103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:20,853 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:20,853 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:20,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-07-21 08:54:21,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:21,061 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:54:21,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:21,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1608022101, now seen corresponding path program 1 times [2022-07-21 08:54:21,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:21,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127039071] [2022-07-21 08:54:21,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:21,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:21,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:21,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:21,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127039071] [2022-07-21 08:54:21,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127039071] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:21,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585110419] [2022-07-21 08:54:21,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:21,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:21,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:54:21,160 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:54:21,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-07-21 08:54:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:22,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:54:22,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:54:22,073 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:22,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:54:22,252 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:22,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585110419] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:54:22,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:54:22,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:54:22,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659330452] [2022-07-21 08:54:22,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:54:22,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:54:22,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:22,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:54:22,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:54:22,263 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 892 out of 1129 [2022-07-21 08:54:22,272 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1022 places, 940 transitions, 2184 flow. Second operand has 34 states, 34 states have (on average 894.7941176470588) internal successors, (30423), 34 states have internal predecessors, (30423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:22,272 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:22,272 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 892 of 1129 [2022-07-21 08:54:22,272 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:23,521 INFO L129 PetriNetUnfolder]: 0/1424 cut-off events. [2022-07-21 08:54:23,522 INFO L130 PetriNetUnfolder]: For 735/735 co-relation queries the response was YES. [2022-07-21 08:54:23,522 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2279 conditions, 1424 events. 0/1424 cut-off events. For 735/735 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4537 event pairs, 0 based on Foata normal form. 8/1432 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2022-07-21 08:54:23,548 INFO L132 encePairwiseOnDemand]: 1123/1129 looper letters, 66 selfloop transitions, 45 changer transitions 0/991 dead transitions. [2022-07-21 08:54:23,548 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1066 places, 991 transitions, 2722 flow [2022-07-21 08:54:23,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 08:54:23,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-21 08:54:23,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 40259 transitions. [2022-07-21 08:54:23,581 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7924220057080996 [2022-07-21 08:54:23,581 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 40259 transitions. [2022-07-21 08:54:23,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 40259 transitions. [2022-07-21 08:54:23,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:23,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 40259 transitions. [2022-07-21 08:54:23,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 894.6444444444444) internal successors, (40259), 45 states have internal predecessors, (40259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:23,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1129.0) internal successors, (51934), 46 states have internal predecessors, (51934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:23,664 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1129.0) internal successors, (51934), 46 states have internal predecessors, (51934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:23,664 INFO L186 Difference]: Start difference. First operand has 1022 places, 940 transitions, 2184 flow. Second operand 45 states and 40259 transitions. [2022-07-21 08:54:23,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1066 places, 991 transitions, 2722 flow [2022-07-21 08:54:23,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1060 places, 991 transitions, 2682 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-21 08:54:23,677 INFO L242 Difference]: Finished difference. Result has 1069 places, 965 transitions, 2462 flow [2022-07-21 08:54:23,677 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=2160, PETRI_DIFFERENCE_MINUEND_PLACES=1016, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=940, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=917, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2462, PETRI_PLACES=1069, PETRI_TRANSITIONS=965} [2022-07-21 08:54:23,678 INFO L279 CegarLoopForPetriNet]: 998 programPoint places, 71 predicate places. [2022-07-21 08:54:23,678 INFO L495 AbstractCegarLoop]: Abstraction has has 1069 places, 965 transitions, 2462 flow [2022-07-21 08:54:23,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 894.7941176470588) internal successors, (30423), 34 states have internal predecessors, (30423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:23,680 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:23,680 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:23,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-07-21 08:54:23,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2022-07-21 08:54:23,895 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:54:23,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:23,896 INFO L85 PathProgramCache]: Analyzing trace with hash 312828615, now seen corresponding path program 1 times [2022-07-21 08:54:23,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:23,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723711728] [2022-07-21 08:54:23,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:23,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:24,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:24,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723711728] [2022-07-21 08:54:24,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723711728] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:24,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141742809] [2022-07-21 08:54:24,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:24,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:24,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:54:24,223 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:54:24,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-07-21 08:54:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:25,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 08:54:25,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:54:25,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:25,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:54:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:25,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141742809] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:54:25,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:54:25,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-21 08:54:25,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731502518] [2022-07-21 08:54:25,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:54:25,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-21 08:54:25,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:25,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-21 08:54:25,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-21 08:54:25,901 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 892 out of 1129 [2022-07-21 08:54:25,918 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1069 places, 965 transitions, 2462 flow. Second operand has 66 states, 66 states have (on average 894.8939393939394) internal successors, (59063), 66 states have internal predecessors, (59063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:25,919 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:25,919 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 892 of 1129 [2022-07-21 08:54:25,919 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:27,684 INFO L129 PetriNetUnfolder]: 0/1216 cut-off events. [2022-07-21 08:54:27,685 INFO L130 PetriNetUnfolder]: For 2345/2345 co-relation queries the response was YES. [2022-07-21 08:54:27,685 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2098 conditions, 1216 events. 0/1216 cut-off events. For 2345/2345 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3174 event pairs, 0 based on Foata normal form. 16/1232 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-07-21 08:54:27,687 INFO L132 encePairwiseOnDemand]: 1123/1129 looper letters, 98 selfloop transitions, 93 changer transitions 0/1071 dead transitions. [2022-07-21 08:54:27,687 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1161 places, 1071 transitions, 3692 flow [2022-07-21 08:54:27,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-21 08:54:27,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-21 08:54:27,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 83163 transitions. [2022-07-21 08:54:27,720 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.792051201462899 [2022-07-21 08:54:27,721 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 83163 transitions. [2022-07-21 08:54:27,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 83163 transitions. [2022-07-21 08:54:27,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:27,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 83163 transitions. [2022-07-21 08:54:27,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 894.2258064516129) internal successors, (83163), 93 states have internal predecessors, (83163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:27,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1129.0) internal successors, (106126), 94 states have internal predecessors, (106126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:27,852 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1129.0) internal successors, (106126), 94 states have internal predecessors, (106126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:27,852 INFO L186 Difference]: Start difference. First operand has 1069 places, 965 transitions, 2462 flow. Second operand 93 states and 83163 transitions. [2022-07-21 08:54:27,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1161 places, 1071 transitions, 3692 flow [2022-07-21 08:54:27,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1143 places, 1071 transitions, 3604 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-07-21 08:54:27,868 INFO L242 Difference]: Finished difference. Result has 1160 places, 1014 transitions, 3096 flow [2022-07-21 08:54:27,868 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=2406, PETRI_DIFFERENCE_MINUEND_PLACES=1051, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=965, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=918, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3096, PETRI_PLACES=1160, PETRI_TRANSITIONS=1014} [2022-07-21 08:54:27,868 INFO L279 CegarLoopForPetriNet]: 998 programPoint places, 162 predicate places. [2022-07-21 08:54:27,868 INFO L495 AbstractCegarLoop]: Abstraction has has 1160 places, 1014 transitions, 3096 flow [2022-07-21 08:54:27,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 894.8939393939394) internal successors, (59063), 66 states have internal predecessors, (59063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:27,874 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:27,875 INFO L200 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:27,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-07-21 08:54:28,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-07-21 08:54:28,087 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:54:28,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:28,088 INFO L85 PathProgramCache]: Analyzing trace with hash -256812609, now seen corresponding path program 1 times [2022-07-21 08:54:28,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:28,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349604165] [2022-07-21 08:54:28,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:28,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:29,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:29,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349604165] [2022-07-21 08:54:29,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349604165] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:29,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635942338] [2022-07-21 08:54:29,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:29,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:29,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:54:29,104 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:54:29,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-07-21 08:54:30,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:30,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-21 08:54:30,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:54:30,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:30,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:54:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:32,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635942338] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:54:32,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:54:32,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-07-21 08:54:32,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28709446] [2022-07-21 08:54:32,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:54:32,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-07-21 08:54:32,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:32,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-07-21 08:54:32,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-07-21 08:54:32,382 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 892 out of 1129 [2022-07-21 08:54:32,416 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1160 places, 1014 transitions, 3096 flow. Second operand has 130 states, 130 states have (on average 894.9461538461538) internal successors, (116343), 130 states have internal predecessors, (116343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:32,416 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:32,416 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 892 of 1129 [2022-07-21 08:54:32,416 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:34,466 INFO L129 PetriNetUnfolder]: 0/1190 cut-off events. [2022-07-21 08:54:34,466 INFO L130 PetriNetUnfolder]: For 1692/1692 co-relation queries the response was YES. [2022-07-21 08:54:34,467 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2147 conditions, 1190 events. 0/1190 cut-off events. For 1692/1692 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3031 event pairs, 0 based on Foata normal form. 2/1192 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-07-21 08:54:34,468 INFO L132 encePairwiseOnDemand]: 1124/1129 looper letters, 99 selfloop transitions, 97 changer transitions 0/1064 dead transitions. [2022-07-21 08:54:34,468 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1245 places, 1064 transitions, 3872 flow [2022-07-21 08:54:34,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-07-21 08:54:34,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2022-07-21 08:54:34,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 88506 transitions. [2022-07-21 08:54:34,504 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.79185119574845 [2022-07-21 08:54:34,504 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 88506 transitions. [2022-07-21 08:54:34,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 88506 transitions. [2022-07-21 08:54:34,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:34,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 88506 transitions. [2022-07-21 08:54:34,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 894.0) internal successors, (88506), 99 states have internal predecessors, (88506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:34,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 1129.0) internal successors, (112900), 100 states have internal predecessors, (112900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:34,644 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 1129.0) internal successors, (112900), 100 states have internal predecessors, (112900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:34,644 INFO L186 Difference]: Start difference. First operand has 1160 places, 1014 transitions, 3096 flow. Second operand 99 states and 88506 transitions. [2022-07-21 08:54:34,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1245 places, 1064 transitions, 3872 flow [2022-07-21 08:54:34,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1172 places, 1064 transitions, 3540 flow, removed 19 selfloop flow, removed 73 redundant places. [2022-07-21 08:54:34,661 INFO L242 Difference]: Finished difference. Result has 1172 places, 1004 transitions, 2970 flow [2022-07-21 08:54:34,661 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=2748, PETRI_DIFFERENCE_MINUEND_PLACES=1074, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1001, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=907, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=2970, PETRI_PLACES=1172, PETRI_TRANSITIONS=1004} [2022-07-21 08:54:34,662 INFO L279 CegarLoopForPetriNet]: 998 programPoint places, 174 predicate places. [2022-07-21 08:54:34,662 INFO L495 AbstractCegarLoop]: Abstraction has has 1172 places, 1004 transitions, 2970 flow [2022-07-21 08:54:34,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 894.9461538461538) internal successors, (116343), 130 states have internal predecessors, (116343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:34,673 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:34,674 INFO L200 CegarLoopForPetriNet]: trace histogram [33, 33, 33, 33, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:34,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-07-21 08:54:34,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-07-21 08:54:34,887 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:54:34,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:34,887 INFO L85 PathProgramCache]: Analyzing trace with hash -320541493, now seen corresponding path program 1 times [2022-07-21 08:54:34,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:34,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039558819] [2022-07-21 08:54:34,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:34,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:34,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:54:34,927 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:54:34,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:54:34,994 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:54:34,994 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:54:34,995 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:54:34,995 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:54:34,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2022-07-21 08:54:34,995 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:34,995 WARN L231 ceAbstractionStarter]: 32 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:54:34,995 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 33 thread instances. [2022-07-21 08:54:35,045 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:54:35,059 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1027 places, 1162 transitions, 3545 flow [2022-07-21 08:54:36,262 INFO L129 PetriNetUnfolder]: 334/2444 cut-off events. [2022-07-21 08:54:36,262 INFO L130 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2022-07-21 08:54:36,372 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3105 conditions, 2444 events. 334/2444 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 9259 event pairs, 0 based on Foata normal form. 0/2042 useless extension candidates. Maximal degree in co-relation 2969. Up to 68 conditions per place. [2022-07-21 08:54:36,372 INFO L82 GeneralOperation]: Start removeDead. Operand has 1027 places, 1162 transitions, 3545 flow [2022-07-21 08:54:36,419 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1027 places, 1162 transitions, 3545 flow [2022-07-21 08:54:36,420 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:54:36,420 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:54:36,420 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:54:36,424 INFO L129 PetriNetUnfolder]: 4/91 cut-off events. [2022-07-21 08:54:36,424 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:54:36,424 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:36,425 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] [2022-07-21 08:54:36,425 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:54:36,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:36,425 INFO L85 PathProgramCache]: Analyzing trace with hash 648750215, now seen corresponding path program 1 times [2022-07-21 08:54:36,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:36,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281153704] [2022-07-21 08:54:36,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:36,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:36,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:36,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281153704] [2022-07-21 08:54:36,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281153704] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:54:36,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:54:36,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:54:36,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041431789] [2022-07-21 08:54:36,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:54:36,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:54:36,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:36,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:54:36,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:54:36,455 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 919 out of 1162 [2022-07-21 08:54:36,456 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1027 places, 1162 transitions, 3545 flow. Second operand has 3 states, 3 states have (on average 920.0) internal successors, (2760), 3 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:36,456 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:36,456 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 919 of 1162 [2022-07-21 08:54:36,456 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:37,606 INFO L129 PetriNetUnfolder]: 0/2051 cut-off events. [2022-07-21 08:54:37,606 INFO L130 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2022-07-21 08:54:37,606 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2915 conditions, 2051 events. 0/2051 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8779 event pairs, 0 based on Foata normal form. 19000/20985 useless extension candidates. Maximal degree in co-relation 0. Up to 198 conditions per place. [2022-07-21 08:54:37,610 INFO L132 encePairwiseOnDemand]: 957/1162 looper letters, 42 selfloop transitions, 2 changer transitions 12/963 dead transitions. [2022-07-21 08:54:37,610 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1028 places, 963 transitions, 3235 flow [2022-07-21 08:54:37,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:54:37,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:54:37,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3011 transitions. [2022-07-21 08:54:37,612 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8637406769936891 [2022-07-21 08:54:37,612 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3011 transitions. [2022-07-21 08:54:37,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3011 transitions. [2022-07-21 08:54:37,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:37,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3011 transitions. [2022-07-21 08:54:37,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1003.6666666666666) internal successors, (3011), 3 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:37,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1162.0) internal successors, (4648), 4 states have internal predecessors, (4648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:37,616 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1162.0) internal successors, (4648), 4 states have internal predecessors, (4648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:37,616 INFO L186 Difference]: Start difference. First operand has 1027 places, 1162 transitions, 3545 flow. Second operand 3 states and 3011 transitions. [2022-07-21 08:54:37,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1028 places, 963 transitions, 3235 flow [2022-07-21 08:54:37,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1028 places, 963 transitions, 2179 flow, removed 528 selfloop flow, removed 0 redundant places. [2022-07-21 08:54:37,631 INFO L242 Difference]: Finished difference. Result has 1029 places, 948 transitions, 2071 flow [2022-07-21 08:54:37,632 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1162, PETRI_DIFFERENCE_MINUEND_FLOW=2083, PETRI_DIFFERENCE_MINUEND_PLACES=1026, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=959, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=957, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2071, PETRI_PLACES=1029, PETRI_TRANSITIONS=948} [2022-07-21 08:54:37,632 INFO L279 CegarLoopForPetriNet]: 1027 programPoint places, 2 predicate places. [2022-07-21 08:54:37,632 INFO L495 AbstractCegarLoop]: Abstraction has has 1029 places, 948 transitions, 2071 flow [2022-07-21 08:54:37,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 920.0) internal successors, (2760), 3 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:37,632 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:37,632 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:37,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2022-07-21 08:54:37,633 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:54:37,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:37,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1321003424, now seen corresponding path program 1 times [2022-07-21 08:54:37,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:37,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446548655] [2022-07-21 08:54:37,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:37,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:37,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:37,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446548655] [2022-07-21 08:54:37,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446548655] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:37,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499657626] [2022-07-21 08:54:37,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:37,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:37,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:54:37,662 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:54:37,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-07-21 08:54:38,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:38,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:54:38,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:54:38,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:38,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:54:38,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:38,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499657626] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:54:38,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:54:38,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:54:38,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274425330] [2022-07-21 08:54:38,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:54:38,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:54:38,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:38,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:54:38,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:54:38,699 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 918 out of 1162 [2022-07-21 08:54:38,701 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1029 places, 948 transitions, 2071 flow. Second operand has 10 states, 10 states have (on average 920.3) internal successors, (9203), 10 states have internal predecessors, (9203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:38,702 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:38,702 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 918 of 1162 [2022-07-21 08:54:38,702 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:39,617 INFO L129 PetriNetUnfolder]: 0/1629 cut-off events. [2022-07-21 08:54:39,617 INFO L130 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-07-21 08:54:39,617 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2064 conditions, 1629 events. 0/1629 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5737 event pairs, 0 based on Foata normal form. 2/1631 useless extension candidates. Maximal degree in co-relation 0. Up to 127 conditions per place. [2022-07-21 08:54:39,620 INFO L132 encePairwiseOnDemand]: 1156/1162 looper letters, 43 selfloop transitions, 9 changer transitions 0/958 dead transitions. [2022-07-21 08:54:39,620 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1025 places, 958 transitions, 2197 flow [2022-07-21 08:54:39,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:54:39,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:54:39,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8316 transitions. [2022-07-21 08:54:39,624 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7951807228915663 [2022-07-21 08:54:39,624 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8316 transitions. [2022-07-21 08:54:39,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8316 transitions. [2022-07-21 08:54:39,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:39,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8316 transitions. [2022-07-21 08:54:39,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 924.0) internal successors, (8316), 9 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:39,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1162.0) internal successors, (11620), 10 states have internal predecessors, (11620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:39,635 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1162.0) internal successors, (11620), 10 states have internal predecessors, (11620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:39,635 INFO L186 Difference]: Start difference. First operand has 1029 places, 948 transitions, 2071 flow. Second operand 9 states and 8316 transitions. [2022-07-21 08:54:39,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1025 places, 958 transitions, 2197 flow [2022-07-21 08:54:39,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1024 places, 958 transitions, 2195 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:54:39,644 INFO L242 Difference]: Finished difference. Result has 1027 places, 954 transitions, 2119 flow [2022-07-21 08:54:39,645 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1162, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=1016, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=948, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=942, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2119, PETRI_PLACES=1027, PETRI_TRANSITIONS=954} [2022-07-21 08:54:39,645 INFO L279 CegarLoopForPetriNet]: 1027 programPoint places, 0 predicate places. [2022-07-21 08:54:39,645 INFO L495 AbstractCegarLoop]: Abstraction has has 1027 places, 954 transitions, 2119 flow [2022-07-21 08:54:39,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 920.3) internal successors, (9203), 10 states have internal predecessors, (9203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:39,646 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:39,646 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] [2022-07-21 08:54:39,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-07-21 08:54:39,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:39,867 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:54:39,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:39,867 INFO L85 PathProgramCache]: Analyzing trace with hash 126077461, now seen corresponding path program 1 times [2022-07-21 08:54:39,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:39,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410899470] [2022-07-21 08:54:39,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:39,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:39,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:39,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410899470] [2022-07-21 08:54:39,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410899470] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:39,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422385222] [2022-07-21 08:54:39,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:39,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:39,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:54:39,918 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:54:39,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-07-21 08:54:40,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:40,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:54:40,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:54:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:40,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:54:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:40,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422385222] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:54:40,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:54:40,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:54:40,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984716381] [2022-07-21 08:54:40,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:54:40,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:54:40,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:40,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:54:40,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:54:40,708 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 918 out of 1162 [2022-07-21 08:54:40,712 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1027 places, 954 transitions, 2119 flow. Second operand has 18 states, 18 states have (on average 920.6111111111111) internal successors, (16571), 18 states have internal predecessors, (16571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:40,712 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:40,713 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 918 of 1162 [2022-07-21 08:54:40,713 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:41,726 INFO L129 PetriNetUnfolder]: 0/1577 cut-off events. [2022-07-21 08:54:41,726 INFO L130 PetriNetUnfolder]: For 192/192 co-relation queries the response was YES. [2022-07-21 08:54:41,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2257 conditions, 1577 events. 0/1577 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5405 event pairs, 0 based on Foata normal form. 4/1581 useless extension candidates. Maximal degree in co-relation 0. Up to 111 conditions per place. [2022-07-21 08:54:41,730 INFO L132 encePairwiseOnDemand]: 1156/1162 looper letters, 51 selfloop transitions, 21 changer transitions 0/978 dead transitions. [2022-07-21 08:54:41,730 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1047 places, 978 transitions, 2371 flow [2022-07-21 08:54:41,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:54:41,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:54:41,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 19354 transitions. [2022-07-21 08:54:41,738 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7931317105155316 [2022-07-21 08:54:41,739 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 19354 transitions. [2022-07-21 08:54:41,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 19354 transitions. [2022-07-21 08:54:41,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:41,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 19354 transitions. [2022-07-21 08:54:41,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 921.6190476190476) internal successors, (19354), 21 states have internal predecessors, (19354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:41,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1162.0) internal successors, (25564), 22 states have internal predecessors, (25564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:41,766 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1162.0) internal successors, (25564), 22 states have internal predecessors, (25564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:41,766 INFO L186 Difference]: Start difference. First operand has 1027 places, 954 transitions, 2119 flow. Second operand 21 states and 19354 transitions. [2022-07-21 08:54:41,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1047 places, 978 transitions, 2371 flow [2022-07-21 08:54:41,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1046 places, 978 transitions, 2357 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:54:41,777 INFO L242 Difference]: Finished difference. Result has 1051 places, 967 transitions, 2243 flow [2022-07-21 08:54:41,777 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1162, PETRI_DIFFERENCE_MINUEND_FLOW=2113, PETRI_DIFFERENCE_MINUEND_PLACES=1026, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=954, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=943, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2243, PETRI_PLACES=1051, PETRI_TRANSITIONS=967} [2022-07-21 08:54:41,778 INFO L279 CegarLoopForPetriNet]: 1027 programPoint places, 24 predicate places. [2022-07-21 08:54:41,778 INFO L495 AbstractCegarLoop]: Abstraction has has 1051 places, 967 transitions, 2243 flow [2022-07-21 08:54:41,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 920.6111111111111) internal successors, (16571), 18 states have internal predecessors, (16571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:41,779 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:41,779 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:41,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-07-21 08:54:41,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2022-07-21 08:54:41,995 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:54:41,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:41,996 INFO L85 PathProgramCache]: Analyzing trace with hash 211525899, now seen corresponding path program 1 times [2022-07-21 08:54:41,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:41,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909005400] [2022-07-21 08:54:41,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:41,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:42,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:42,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:42,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909005400] [2022-07-21 08:54:42,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909005400] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:42,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416736562] [2022-07-21 08:54:42,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:42,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:42,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:54:42,092 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:54:42,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-07-21 08:54:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:43,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:54:43,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:54:43,067 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:43,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:54:43,244 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:43,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416736562] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:54:43,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:54:43,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:54:43,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125861084] [2022-07-21 08:54:43,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:54:43,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:54:43,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:43,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:54:43,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:54:43,255 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 918 out of 1162 [2022-07-21 08:54:43,263 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1051 places, 967 transitions, 2243 flow. Second operand has 34 states, 34 states have (on average 920.7941176470588) internal successors, (31307), 34 states have internal predecessors, (31307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:43,264 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:43,264 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 918 of 1162 [2022-07-21 08:54:43,264 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:44,433 INFO L129 PetriNetUnfolder]: 0/1473 cut-off events. [2022-07-21 08:54:44,434 INFO L130 PetriNetUnfolder]: For 762/762 co-relation queries the response was YES. [2022-07-21 08:54:44,434 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2358 conditions, 1473 events. 0/1473 cut-off events. For 762/762 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4720 event pairs, 0 based on Foata normal form. 8/1481 useless extension candidates. Maximal degree in co-relation 0. Up to 79 conditions per place. [2022-07-21 08:54:44,436 INFO L132 encePairwiseOnDemand]: 1156/1162 looper letters, 67 selfloop transitions, 45 changer transitions 0/1018 dead transitions. [2022-07-21 08:54:44,436 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1095 places, 1018 transitions, 2783 flow [2022-07-21 08:54:44,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 08:54:44,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-21 08:54:44,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 41430 transitions. [2022-07-21 08:54:44,454 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7923121055651177 [2022-07-21 08:54:44,454 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 41430 transitions. [2022-07-21 08:54:44,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 41430 transitions. [2022-07-21 08:54:44,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:44,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 41430 transitions. [2022-07-21 08:54:44,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 920.6666666666666) internal successors, (41430), 45 states have internal predecessors, (41430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:44,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1162.0) internal successors, (53452), 46 states have internal predecessors, (53452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:44,519 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1162.0) internal successors, (53452), 46 states have internal predecessors, (53452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:44,519 INFO L186 Difference]: Start difference. First operand has 1051 places, 967 transitions, 2243 flow. Second operand 45 states and 41430 transitions. [2022-07-21 08:54:44,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1095 places, 1018 transitions, 2783 flow [2022-07-21 08:54:44,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1089 places, 1018 transitions, 2743 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-21 08:54:44,532 INFO L242 Difference]: Finished difference. Result has 1098 places, 992 transitions, 2521 flow [2022-07-21 08:54:44,533 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1162, PETRI_DIFFERENCE_MINUEND_FLOW=2219, PETRI_DIFFERENCE_MINUEND_PLACES=1045, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=967, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=944, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2521, PETRI_PLACES=1098, PETRI_TRANSITIONS=992} [2022-07-21 08:54:44,533 INFO L279 CegarLoopForPetriNet]: 1027 programPoint places, 71 predicate places. [2022-07-21 08:54:44,533 INFO L495 AbstractCegarLoop]: Abstraction has has 1098 places, 992 transitions, 2521 flow [2022-07-21 08:54:44,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 920.7941176470588) internal successors, (31307), 34 states have internal predecessors, (31307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:44,536 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:44,537 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:44,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-07-21 08:54:44,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:44,751 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:54:44,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:44,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1691742425, now seen corresponding path program 1 times [2022-07-21 08:54:44,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:44,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519383470] [2022-07-21 08:54:44,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:44,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:45,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:45,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:45,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519383470] [2022-07-21 08:54:45,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519383470] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:45,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396285450] [2022-07-21 08:54:45,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:45,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:45,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:54:45,009 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:54:45,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-07-21 08:54:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:46,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 08:54:46,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:54:46,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:46,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:54:46,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:46,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396285450] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:54:46,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:54:46,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-21 08:54:46,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000470787] [2022-07-21 08:54:46,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:54:46,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-21 08:54:46,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:46,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-21 08:54:46,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-21 08:54:46,776 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 918 out of 1162 [2022-07-21 08:54:46,793 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1098 places, 992 transitions, 2521 flow. Second operand has 66 states, 66 states have (on average 920.8939393939394) internal successors, (60779), 66 states have internal predecessors, (60779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:46,793 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:46,793 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 918 of 1162 [2022-07-21 08:54:46,793 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:48,709 INFO L129 PetriNetUnfolder]: 0/1265 cut-off events. [2022-07-21 08:54:48,710 INFO L130 PetriNetUnfolder]: For 2466/2466 co-relation queries the response was YES. [2022-07-21 08:54:48,710 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2190 conditions, 1265 events. 0/1265 cut-off events. For 2466/2466 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3359 event pairs, 0 based on Foata normal form. 16/1281 useless extension candidates. Maximal degree in co-relation 0. Up to 62 conditions per place. [2022-07-21 08:54:48,738 INFO L132 encePairwiseOnDemand]: 1156/1162 looper letters, 99 selfloop transitions, 93 changer transitions 0/1098 dead transitions. [2022-07-21 08:54:48,739 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1190 places, 1098 transitions, 3753 flow [2022-07-21 08:54:48,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-21 08:54:48,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-21 08:54:48,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 85582 transitions. [2022-07-21 08:54:48,805 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.791941961393963 [2022-07-21 08:54:48,806 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 85582 transitions. [2022-07-21 08:54:48,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 85582 transitions. [2022-07-21 08:54:48,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:48,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 85582 transitions. [2022-07-21 08:54:48,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 920.236559139785) internal successors, (85582), 93 states have internal predecessors, (85582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:49,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1162.0) internal successors, (109228), 94 states have internal predecessors, (109228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:49,056 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1162.0) internal successors, (109228), 94 states have internal predecessors, (109228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:49,056 INFO L186 Difference]: Start difference. First operand has 1098 places, 992 transitions, 2521 flow. Second operand 93 states and 85582 transitions. [2022-07-21 08:54:49,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1190 places, 1098 transitions, 3753 flow [2022-07-21 08:54:49,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1172 places, 1098 transitions, 3665 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-07-21 08:54:49,070 INFO L242 Difference]: Finished difference. Result has 1189 places, 1041 transitions, 3155 flow [2022-07-21 08:54:49,071 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1162, PETRI_DIFFERENCE_MINUEND_FLOW=2465, PETRI_DIFFERENCE_MINUEND_PLACES=1080, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=992, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=945, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3155, PETRI_PLACES=1189, PETRI_TRANSITIONS=1041} [2022-07-21 08:54:49,071 INFO L279 CegarLoopForPetriNet]: 1027 programPoint places, 162 predicate places. [2022-07-21 08:54:49,071 INFO L495 AbstractCegarLoop]: Abstraction has has 1189 places, 1041 transitions, 3155 flow [2022-07-21 08:54:49,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 920.8939393939394) internal successors, (60779), 66 states have internal predecessors, (60779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:49,077 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:49,077 INFO L200 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:49,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-07-21 08:54:49,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:49,288 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:54:49,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:49,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1031984097, now seen corresponding path program 1 times [2022-07-21 08:54:49,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:49,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986744558] [2022-07-21 08:54:49,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:49,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:49,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:50,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:50,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986744558] [2022-07-21 08:54:50,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986744558] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:50,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100328399] [2022-07-21 08:54:50,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:50,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:50,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:54:50,256 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:54:50,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-07-21 08:54:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:51,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-21 08:54:51,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:54:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:51,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:54:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:53,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100328399] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:54:53,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:54:53,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-07-21 08:54:53,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872359513] [2022-07-21 08:54:53,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:54:53,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-07-21 08:54:53,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:53,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-07-21 08:54:53,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-07-21 08:54:53,855 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 918 out of 1162 [2022-07-21 08:54:53,889 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1189 places, 1041 transitions, 3155 flow. Second operand has 130 states, 130 states have (on average 920.9461538461538) internal successors, (119723), 130 states have internal predecessors, (119723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:53,889 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:53,889 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 918 of 1162 [2022-07-21 08:54:53,890 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:56,207 INFO L129 PetriNetUnfolder]: 0/1226 cut-off events. [2022-07-21 08:54:56,208 INFO L130 PetriNetUnfolder]: For 2189/2189 co-relation queries the response was YES. [2022-07-21 08:54:56,208 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2215 conditions, 1226 events. 0/1226 cut-off events. For 2189/2189 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3129 event pairs, 0 based on Foata normal form. 3/1229 useless extension candidates. Maximal degree in co-relation 0. Up to 62 conditions per place. [2022-07-21 08:54:56,209 INFO L132 encePairwiseOnDemand]: 1157/1162 looper letters, 102 selfloop transitions, 100 changer transitions 0/1096 dead transitions. [2022-07-21 08:54:56,210 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1277 places, 1096 transitions, 3997 flow [2022-07-21 08:54:56,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-07-21 08:54:56,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2022-07-21 08:54:56,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 93841 transitions. [2022-07-21 08:54:56,248 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7917468192096115 [2022-07-21 08:54:56,249 INFO L72 ComplementDD]: Start complementDD. Operand 102 states and 93841 transitions. [2022-07-21 08:54:56,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 102 states and 93841 transitions. [2022-07-21 08:54:56,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:56,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 102 states and 93841 transitions. [2022-07-21 08:54:56,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 103 states, 102 states have (on average 920.0098039215686) internal successors, (93841), 102 states have internal predecessors, (93841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:56,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 103 states, 103 states have (on average 1162.0) internal successors, (119686), 103 states have internal predecessors, (119686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:56,402 INFO L81 ComplementDD]: Finished complementDD. Result has 103 states, 103 states have (on average 1162.0) internal successors, (119686), 103 states have internal predecessors, (119686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:56,403 INFO L186 Difference]: Start difference. First operand has 1189 places, 1041 transitions, 3155 flow. Second operand 102 states and 93841 transitions. [2022-07-21 08:54:56,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1277 places, 1096 transitions, 3997 flow [2022-07-21 08:54:56,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1204 places, 1096 transitions, 3655 flow, removed 20 selfloop flow, removed 73 redundant places. [2022-07-21 08:54:56,420 INFO L242 Difference]: Finished difference. Result has 1204 places, 1034 transitions, 3063 flow [2022-07-21 08:54:56,421 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1162, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=1103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1028, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=934, PETRI_DIFFERENCE_SUBTRAHEND_STATES=102, PETRI_FLOW=3063, PETRI_PLACES=1204, PETRI_TRANSITIONS=1034} [2022-07-21 08:54:56,421 INFO L279 CegarLoopForPetriNet]: 1027 programPoint places, 177 predicate places. [2022-07-21 08:54:56,421 INFO L495 AbstractCegarLoop]: Abstraction has has 1204 places, 1034 transitions, 3063 flow [2022-07-21 08:54:56,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 920.9461538461538) internal successors, (119723), 130 states have internal predecessors, (119723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:56,433 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:56,434 INFO L200 CegarLoopForPetriNet]: trace histogram [34, 34, 34, 34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:56,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-07-21 08:54:56,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:56,647 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:54:56,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:56,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1377354468, now seen corresponding path program 1 times [2022-07-21 08:54:56,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:56,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6931336] [2022-07-21 08:54:56,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:56,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:54:56,690 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:54:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:54:56,763 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:54:56,763 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:54:56,764 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:54:56,764 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:54:56,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2022-07-21 08:54:56,764 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:56,764 WARN L231 ceAbstractionStarter]: 33 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:54:56,764 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 34 thread instances. [2022-07-21 08:54:56,809 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:54:56,814 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1056 places, 1195 transitions, 3682 flow [2022-07-21 08:54:57,922 INFO L129 PetriNetUnfolder]: 344/2516 cut-off events. [2022-07-21 08:54:57,922 INFO L130 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2022-07-21 08:54:58,149 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3214 conditions, 2516 events. 344/2516 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 9538 event pairs, 0 based on Foata normal form. 0/2102 useless extension candidates. Maximal degree in co-relation 3077. Up to 70 conditions per place. [2022-07-21 08:54:58,150 INFO L82 GeneralOperation]: Start removeDead. Operand has 1056 places, 1195 transitions, 3682 flow [2022-07-21 08:54:58,245 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1056 places, 1195 transitions, 3682 flow [2022-07-21 08:54:58,245 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:54:58,245 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:54:58,246 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:54:58,249 INFO L129 PetriNetUnfolder]: 4/90 cut-off events. [2022-07-21 08:54:58,250 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:54:58,250 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:58,250 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] [2022-07-21 08:54:58,250 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:54:58,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:58,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1426002342, now seen corresponding path program 1 times [2022-07-21 08:54:58,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:58,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77026941] [2022-07-21 08:54:58,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:58,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:58,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:58,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:58,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77026941] [2022-07-21 08:54:58,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77026941] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:54:58,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:54:58,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:54:58,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179145940] [2022-07-21 08:54:58,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:54:58,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:54:58,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:58,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:54:58,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:54:58,274 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 952 out of 1195 [2022-07-21 08:54:58,274 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1056 places, 1195 transitions, 3682 flow. Second operand has 2 states, 2 states have (on average 952.5) internal successors, (1905), 2 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:58,275 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:58,275 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 952 of 1195 [2022-07-21 08:54:58,275 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:59,304 INFO L129 PetriNetUnfolder]: 0/2137 cut-off events. [2022-07-21 08:54:59,304 INFO L130 PetriNetUnfolder]: For 7701/7701 co-relation queries the response was YES. [2022-07-21 08:54:59,305 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2870 conditions, 2137 events. 0/2137 cut-off events. For 7701/7701 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 9100 event pairs, 0 based on Foata normal form. 3514/5581 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-07-21 08:54:59,308 INFO L132 encePairwiseOnDemand]: 987/1195 looper letters, 34 selfloop transitions, 0 changer transitions 12/986 dead transitions. [2022-07-21 08:54:59,308 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1056 places, 986 transitions, 3332 flow [2022-07-21 08:54:59,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:54:59,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:54:59,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2146 transitions. [2022-07-21 08:54:59,310 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.897907949790795 [2022-07-21 08:54:59,310 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2146 transitions. [2022-07-21 08:54:59,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2146 transitions. [2022-07-21 08:54:59,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:59,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2146 transitions. [2022-07-21 08:54:59,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1073.0) internal successors, (2146), 2 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:59,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1195.0) internal successors, (3585), 3 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:59,313 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1195.0) internal successors, (3585), 3 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:59,313 INFO L186 Difference]: Start difference. First operand has 1056 places, 1195 transitions, 3682 flow. Second operand 2 states and 2146 transitions. [2022-07-21 08:54:59,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1056 places, 986 transitions, 3332 flow [2022-07-21 08:54:59,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1056 places, 986 transitions, 2210 flow, removed 561 selfloop flow, removed 0 redundant places. [2022-07-21 08:54:59,331 INFO L242 Difference]: Finished difference. Result has 1056 places, 974 transitions, 2118 flow [2022-07-21 08:54:59,332 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1195, PETRI_DIFFERENCE_MINUEND_FLOW=2142, PETRI_DIFFERENCE_MINUEND_PLACES=1055, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=986, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=986, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2118, PETRI_PLACES=1056, PETRI_TRANSITIONS=974} [2022-07-21 08:54:59,333 INFO L279 CegarLoopForPetriNet]: 1056 programPoint places, 0 predicate places. [2022-07-21 08:54:59,333 INFO L495 AbstractCegarLoop]: Abstraction has has 1056 places, 974 transitions, 2118 flow [2022-07-21 08:54:59,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 952.5) internal successors, (1905), 2 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:59,333 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:59,333 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] [2022-07-21 08:54:59,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2022-07-21 08:54:59,334 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:54:59,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:59,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1132599335, now seen corresponding path program 1 times [2022-07-21 08:54:59,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:59,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665533863] [2022-07-21 08:54:59,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:59,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:59,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:59,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:59,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665533863] [2022-07-21 08:54:59,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665533863] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:54:59,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:54:59,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:54:59,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905619003] [2022-07-21 08:54:59,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:54:59,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:54:59,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:59,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:54:59,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:54:59,361 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 945 out of 1195 [2022-07-21 08:54:59,362 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1056 places, 974 transitions, 2118 flow. Second operand has 3 states, 3 states have (on average 946.0) internal successors, (2838), 3 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:59,362 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:59,362 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 945 of 1195 [2022-07-21 08:54:59,362 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:55:00,296 INFO L129 PetriNetUnfolder]: 0/1704 cut-off events. [2022-07-21 08:55:00,296 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-07-21 08:55:00,296 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2051 conditions, 1704 events. 0/1704 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6102 event pairs, 0 based on Foata normal form. 0/1670 useless extension candidates. Maximal degree in co-relation 0. Up to 204 conditions per place. [2022-07-21 08:55:00,299 INFO L132 encePairwiseOnDemand]: 1192/1195 looper letters, 43 selfloop transitions, 2 changer transitions 0/978 dead transitions. [2022-07-21 08:55:00,299 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1046 places, 978 transitions, 2216 flow [2022-07-21 08:55:00,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:55:00,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:55:00,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2881 transitions. [2022-07-21 08:55:00,301 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.803626220362622 [2022-07-21 08:55:00,301 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2881 transitions. [2022-07-21 08:55:00,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2881 transitions. [2022-07-21 08:55:00,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:55:00,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2881 transitions. [2022-07-21 08:55:00,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 960.3333333333334) internal successors, (2881), 3 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:00,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1195.0) internal successors, (4780), 4 states have internal predecessors, (4780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:00,306 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1195.0) internal successors, (4780), 4 states have internal predecessors, (4780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:00,306 INFO L186 Difference]: Start difference. First operand has 1056 places, 974 transitions, 2118 flow. Second operand 3 states and 2881 transitions. [2022-07-21 08:55:00,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1046 places, 978 transitions, 2216 flow [2022-07-21 08:55:00,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1046 places, 978 transitions, 2216 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:55:00,315 INFO L242 Difference]: Finished difference. Result has 1047 places, 975 transitions, 2130 flow [2022-07-21 08:55:00,315 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1195, PETRI_DIFFERENCE_MINUEND_FLOW=2118, PETRI_DIFFERENCE_MINUEND_PLACES=1044, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=974, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=972, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2130, PETRI_PLACES=1047, PETRI_TRANSITIONS=975} [2022-07-21 08:55:00,320 INFO L279 CegarLoopForPetriNet]: 1056 programPoint places, -9 predicate places. [2022-07-21 08:55:00,320 INFO L495 AbstractCegarLoop]: Abstraction has has 1047 places, 975 transitions, 2130 flow [2022-07-21 08:55:00,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 946.0) internal successors, (2838), 3 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:00,320 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:55:00,320 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:55:00,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2022-07-21 08:55:00,321 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:55:00,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:55:00,321 INFO L85 PathProgramCache]: Analyzing trace with hash 842827840, now seen corresponding path program 1 times [2022-07-21 08:55:00,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:55:00,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552363986] [2022-07-21 08:55:00,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:00,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:55:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:00,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:55:00,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552363986] [2022-07-21 08:55:00,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552363986] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:55:00,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349480759] [2022-07-21 08:55:00,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:00,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:55:00,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:55:00,354 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:55:00,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-07-21 08:55:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:01,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:55:01,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:55:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:01,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:55:01,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:01,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349480759] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:55:01,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:55:01,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:55:01,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437578716] [2022-07-21 08:55:01,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:55:01,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:55:01,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:55:01,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:55:01,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:55:01,101 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 944 out of 1195 [2022-07-21 08:55:01,104 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1047 places, 975 transitions, 2130 flow. Second operand has 10 states, 10 states have (on average 946.3) internal successors, (9463), 10 states have internal predecessors, (9463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:01,104 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:55:01,104 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 944 of 1195 [2022-07-21 08:55:01,104 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:55:02,010 INFO L129 PetriNetUnfolder]: 0/1678 cut-off events. [2022-07-21 08:55:02,011 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-07-21 08:55:02,012 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2127 conditions, 1678 events. 0/1678 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5945 event pairs, 0 based on Foata normal form. 2/1680 useless extension candidates. Maximal degree in co-relation 0. Up to 131 conditions per place. [2022-07-21 08:55:02,015 INFO L132 encePairwiseOnDemand]: 1189/1195 looper letters, 44 selfloop transitions, 9 changer transitions 0/985 dead transitions. [2022-07-21 08:55:02,015 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1055 places, 985 transitions, 2258 flow [2022-07-21 08:55:02,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:55:02,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:55:02,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8551 transitions. [2022-07-21 08:55:02,019 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7950720595072059 [2022-07-21 08:55:02,019 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8551 transitions. [2022-07-21 08:55:02,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8551 transitions. [2022-07-21 08:55:02,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:55:02,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8551 transitions. [2022-07-21 08:55:02,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 950.1111111111111) internal successors, (8551), 9 states have internal predecessors, (8551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:02,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1195.0) internal successors, (11950), 10 states have internal predecessors, (11950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:02,030 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1195.0) internal successors, (11950), 10 states have internal predecessors, (11950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:02,030 INFO L186 Difference]: Start difference. First operand has 1047 places, 975 transitions, 2130 flow. Second operand 9 states and 8551 transitions. [2022-07-21 08:55:02,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1055 places, 985 transitions, 2258 flow [2022-07-21 08:55:02,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1054 places, 985 transitions, 2256 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:55:02,039 INFO L242 Difference]: Finished difference. Result has 1057 places, 981 transitions, 2178 flow [2022-07-21 08:55:02,040 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1195, PETRI_DIFFERENCE_MINUEND_FLOW=2128, PETRI_DIFFERENCE_MINUEND_PLACES=1046, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=975, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=969, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2178, PETRI_PLACES=1057, PETRI_TRANSITIONS=981} [2022-07-21 08:55:02,040 INFO L279 CegarLoopForPetriNet]: 1056 programPoint places, 1 predicate places. [2022-07-21 08:55:02,040 INFO L495 AbstractCegarLoop]: Abstraction has has 1057 places, 981 transitions, 2178 flow [2022-07-21 08:55:02,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 946.3) internal successors, (9463), 10 states have internal predecessors, (9463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:02,041 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:55:02,041 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] [2022-07-21 08:55:02,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-07-21 08:55:02,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-07-21 08:55:02,256 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:55:02,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:55:02,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1370980021, now seen corresponding path program 1 times [2022-07-21 08:55:02,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:55:02,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851225992] [2022-07-21 08:55:02,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:02,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:55:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:02,303 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:02,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:55:02,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851225992] [2022-07-21 08:55:02,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851225992] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:55:02,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882186911] [2022-07-21 08:55:02,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:02,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:55:02,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:55:02,305 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:55:02,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-07-21 08:55:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:03,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:55:03,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:55:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:03,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:55:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:03,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882186911] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:55:03,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:55:03,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:55:03,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893458220] [2022-07-21 08:55:03,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:55:03,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:55:03,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:55:03,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:55:03,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:55:03,281 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 944 out of 1195 [2022-07-21 08:55:03,285 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1057 places, 981 transitions, 2178 flow. Second operand has 18 states, 18 states have (on average 946.6111111111111) internal successors, (17039), 18 states have internal predecessors, (17039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:03,285 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:55:03,286 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 944 of 1195 [2022-07-21 08:55:03,286 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:55:04,359 INFO L129 PetriNetUnfolder]: 0/1626 cut-off events. [2022-07-21 08:55:04,359 INFO L130 PetriNetUnfolder]: For 198/198 co-relation queries the response was YES. [2022-07-21 08:55:04,359 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2328 conditions, 1626 events. 0/1626 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5584 event pairs, 0 based on Foata normal form. 4/1630 useless extension candidates. Maximal degree in co-relation 0. Up to 115 conditions per place. [2022-07-21 08:55:04,362 INFO L132 encePairwiseOnDemand]: 1189/1195 looper letters, 52 selfloop transitions, 21 changer transitions 0/1005 dead transitions. [2022-07-21 08:55:04,362 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1077 places, 1005 transitions, 2432 flow [2022-07-21 08:55:04,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:55:04,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:55:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 19901 transitions. [2022-07-21 08:55:04,371 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7930264993026499 [2022-07-21 08:55:04,371 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 19901 transitions. [2022-07-21 08:55:04,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 19901 transitions. [2022-07-21 08:55:04,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:55:04,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 19901 transitions. [2022-07-21 08:55:04,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 947.6666666666666) internal successors, (19901), 21 states have internal predecessors, (19901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:04,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1195.0) internal successors, (26290), 22 states have internal predecessors, (26290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:04,399 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1195.0) internal successors, (26290), 22 states have internal predecessors, (26290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:04,399 INFO L186 Difference]: Start difference. First operand has 1057 places, 981 transitions, 2178 flow. Second operand 21 states and 19901 transitions. [2022-07-21 08:55:04,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1077 places, 1005 transitions, 2432 flow [2022-07-21 08:55:04,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1076 places, 1005 transitions, 2418 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:55:04,411 INFO L242 Difference]: Finished difference. Result has 1081 places, 994 transitions, 2302 flow [2022-07-21 08:55:04,412 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1195, PETRI_DIFFERENCE_MINUEND_FLOW=2172, PETRI_DIFFERENCE_MINUEND_PLACES=1056, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=981, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=970, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2302, PETRI_PLACES=1081, PETRI_TRANSITIONS=994} [2022-07-21 08:55:04,412 INFO L279 CegarLoopForPetriNet]: 1056 programPoint places, 25 predicate places. [2022-07-21 08:55:04,412 INFO L495 AbstractCegarLoop]: Abstraction has has 1081 places, 994 transitions, 2302 flow [2022-07-21 08:55:04,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 946.6111111111111) internal successors, (17039), 18 states have internal predecessors, (17039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:04,414 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:55:04,414 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:55:04,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-07-21 08:55:04,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:55:04,635 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:55:04,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:55:04,635 INFO L85 PathProgramCache]: Analyzing trace with hash -419266133, now seen corresponding path program 1 times [2022-07-21 08:55:04,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:55:04,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029832441] [2022-07-21 08:55:04,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:04,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:55:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:04,745 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:04,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:55:04,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029832441] [2022-07-21 08:55:04,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029832441] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:55:04,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083564943] [2022-07-21 08:55:04,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:04,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:55:04,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:55:04,746 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:55:04,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-07-21 08:55:05,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:05,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:55:05,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:55:05,870 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:05,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:55:06,082 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:06,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083564943] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:55:06,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:55:06,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:55:06,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892978670] [2022-07-21 08:55:06,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:55:06,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:55:06,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:55:06,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:55:06,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:55:06,094 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 944 out of 1195 [2022-07-21 08:55:06,102 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1081 places, 994 transitions, 2302 flow. Second operand has 34 states, 34 states have (on average 946.7941176470588) internal successors, (32191), 34 states have internal predecessors, (32191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:06,103 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:55:06,103 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 944 of 1195 [2022-07-21 08:55:06,103 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:55:07,381 INFO L129 PetriNetUnfolder]: 0/1522 cut-off events. [2022-07-21 08:55:07,381 INFO L130 PetriNetUnfolder]: For 789/789 co-relation queries the response was YES. [2022-07-21 08:55:07,381 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2438 conditions, 1522 events. 0/1522 cut-off events. For 789/789 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4903 event pairs, 0 based on Foata normal form. 8/1530 useless extension candidates. Maximal degree in co-relation 0. Up to 83 conditions per place. [2022-07-21 08:55:07,384 INFO L132 encePairwiseOnDemand]: 1189/1195 looper letters, 68 selfloop transitions, 45 changer transitions 0/1045 dead transitions. [2022-07-21 08:55:07,384 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1125 places, 1045 transitions, 2844 flow [2022-07-21 08:55:07,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 08:55:07,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-21 08:55:07,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 42601 transitions. [2022-07-21 08:55:07,402 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7922082752208275 [2022-07-21 08:55:07,403 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 42601 transitions. [2022-07-21 08:55:07,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 42601 transitions. [2022-07-21 08:55:07,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:55:07,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 42601 transitions. [2022-07-21 08:55:07,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 946.6888888888889) internal successors, (42601), 45 states have internal predecessors, (42601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:07,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1195.0) internal successors, (54970), 46 states have internal predecessors, (54970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:07,470 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1195.0) internal successors, (54970), 46 states have internal predecessors, (54970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:07,470 INFO L186 Difference]: Start difference. First operand has 1081 places, 994 transitions, 2302 flow. Second operand 45 states and 42601 transitions. [2022-07-21 08:55:07,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1125 places, 1045 transitions, 2844 flow [2022-07-21 08:55:07,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1119 places, 1045 transitions, 2804 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-21 08:55:07,484 INFO L242 Difference]: Finished difference. Result has 1128 places, 1019 transitions, 2580 flow [2022-07-21 08:55:07,484 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1195, PETRI_DIFFERENCE_MINUEND_FLOW=2278, PETRI_DIFFERENCE_MINUEND_PLACES=1075, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=994, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=971, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2580, PETRI_PLACES=1128, PETRI_TRANSITIONS=1019} [2022-07-21 08:55:07,485 INFO L279 CegarLoopForPetriNet]: 1056 programPoint places, 72 predicate places. [2022-07-21 08:55:07,485 INFO L495 AbstractCegarLoop]: Abstraction has has 1128 places, 1019 transitions, 2580 flow [2022-07-21 08:55:07,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 946.7941176470588) internal successors, (32191), 34 states have internal predecessors, (32191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:07,488 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:55:07,488 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:55:07,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-07-21 08:55:07,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:55:07,709 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:55:07,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:55:07,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1423751225, now seen corresponding path program 1 times [2022-07-21 08:55:07,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:55:07,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037140859] [2022-07-21 08:55:07,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:07,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:55:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:07,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:55:07,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037140859] [2022-07-21 08:55:07,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037140859] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:55:07,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953825513] [2022-07-21 08:55:07,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:07,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:55:07,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:55:07,981 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:55:07,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-07-21 08:55:08,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:08,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 08:55:08,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:55:09,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:09,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:55:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:09,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953825513] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:55:09,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:55:09,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-21 08:55:09,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762650414] [2022-07-21 08:55:09,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:55:09,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-21 08:55:09,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:55:09,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-21 08:55:09,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-21 08:55:09,743 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 944 out of 1195 [2022-07-21 08:55:09,760 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1128 places, 1019 transitions, 2580 flow. Second operand has 66 states, 66 states have (on average 946.8939393939394) internal successors, (62495), 66 states have internal predecessors, (62495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:09,760 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:55:09,761 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 944 of 1195 [2022-07-21 08:55:09,761 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:55:12,011 INFO L129 PetriNetUnfolder]: 0/1314 cut-off events. [2022-07-21 08:55:12,012 INFO L130 PetriNetUnfolder]: For 2587/2587 co-relation queries the response was YES. [2022-07-21 08:55:12,012 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2283 conditions, 1314 events. 0/1314 cut-off events. For 2587/2587 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3543 event pairs, 0 based on Foata normal form. 16/1330 useless extension candidates. Maximal degree in co-relation 0. Up to 64 conditions per place. [2022-07-21 08:55:12,014 INFO L132 encePairwiseOnDemand]: 1189/1195 looper letters, 100 selfloop transitions, 93 changer transitions 0/1125 dead transitions. [2022-07-21 08:55:12,014 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1220 places, 1125 transitions, 3814 flow [2022-07-21 08:55:12,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-21 08:55:12,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-21 08:55:12,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 88001 transitions. [2022-07-21 08:55:12,049 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7918387546677464 [2022-07-21 08:55:12,050 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 88001 transitions. [2022-07-21 08:55:12,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 88001 transitions. [2022-07-21 08:55:12,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:55:12,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 88001 transitions. [2022-07-21 08:55:12,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 946.247311827957) internal successors, (88001), 93 states have internal predecessors, (88001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:12,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1195.0) internal successors, (112330), 94 states have internal predecessors, (112330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:12,189 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1195.0) internal successors, (112330), 94 states have internal predecessors, (112330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:12,190 INFO L186 Difference]: Start difference. First operand has 1128 places, 1019 transitions, 2580 flow. Second operand 93 states and 88001 transitions. [2022-07-21 08:55:12,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1220 places, 1125 transitions, 3814 flow [2022-07-21 08:55:12,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1202 places, 1125 transitions, 3726 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-07-21 08:55:12,205 INFO L242 Difference]: Finished difference. Result has 1219 places, 1068 transitions, 3214 flow [2022-07-21 08:55:12,205 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1195, PETRI_DIFFERENCE_MINUEND_FLOW=2524, PETRI_DIFFERENCE_MINUEND_PLACES=1110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1019, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=972, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3214, PETRI_PLACES=1219, PETRI_TRANSITIONS=1068} [2022-07-21 08:55:12,206 INFO L279 CegarLoopForPetriNet]: 1056 programPoint places, 163 predicate places. [2022-07-21 08:55:12,206 INFO L495 AbstractCegarLoop]: Abstraction has has 1219 places, 1068 transitions, 3214 flow [2022-07-21 08:55:12,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 946.8939393939394) internal successors, (62495), 66 states have internal predecessors, (62495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:12,212 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:55:12,212 INFO L200 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:55:12,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-07-21 08:55:12,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2022-07-21 08:55:12,419 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:55:12,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:55:12,420 INFO L85 PathProgramCache]: Analyzing trace with hash -498395969, now seen corresponding path program 1 times [2022-07-21 08:55:12,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:55:12,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265690546] [2022-07-21 08:55:12,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:12,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:55:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:13,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:55:13,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265690546] [2022-07-21 08:55:13,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265690546] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:55:13,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532331174] [2022-07-21 08:55:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:13,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:55:13,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:55:13,427 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:55:13,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-07-21 08:55:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:14,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-21 08:55:14,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:55:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:14,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:55:16,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:16,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532331174] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:55:16,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:55:16,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-07-21 08:55:16,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944930079] [2022-07-21 08:55:16,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:55:16,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-07-21 08:55:16,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:55:16,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-07-21 08:55:16,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-07-21 08:55:16,148 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 944 out of 1195 [2022-07-21 08:55:16,183 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1219 places, 1068 transitions, 3214 flow. Second operand has 130 states, 130 states have (on average 946.9461538461538) internal successors, (123103), 130 states have internal predecessors, (123103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:16,184 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:55:16,184 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 944 of 1195 [2022-07-21 08:55:16,184 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:55:18,466 INFO L129 PetriNetUnfolder]: 0/1262 cut-off events. [2022-07-21 08:55:18,467 INFO L130 PetriNetUnfolder]: For 2686/2686 co-relation queries the response was YES. [2022-07-21 08:55:18,467 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2284 conditions, 1262 events. 0/1262 cut-off events. For 2686/2686 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3227 event pairs, 0 based on Foata normal form. 4/1266 useless extension candidates. Maximal degree in co-relation 0. Up to 64 conditions per place. [2022-07-21 08:55:18,469 INFO L132 encePairwiseOnDemand]: 1190/1195 looper letters, 105 selfloop transitions, 103 changer transitions 0/1128 dead transitions. [2022-07-21 08:55:18,469 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1310 places, 1128 transitions, 4122 flow [2022-07-21 08:55:18,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-07-21 08:55:18,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2022-07-21 08:55:18,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 99332 transitions. [2022-07-21 08:55:18,509 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7916477385933453 [2022-07-21 08:55:18,510 INFO L72 ComplementDD]: Start complementDD. Operand 105 states and 99332 transitions. [2022-07-21 08:55:18,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 99332 transitions. [2022-07-21 08:55:18,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:55:18,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 105 states and 99332 transitions. [2022-07-21 08:55:18,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 106 states, 105 states have (on average 946.0190476190476) internal successors, (99332), 105 states have internal predecessors, (99332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:18,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 106 states, 106 states have (on average 1195.0) internal successors, (126670), 106 states have internal predecessors, (126670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:18,670 INFO L81 ComplementDD]: Finished complementDD. Result has 106 states, 106 states have (on average 1195.0) internal successors, (126670), 106 states have internal predecessors, (126670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:18,670 INFO L186 Difference]: Start difference. First operand has 1219 places, 1068 transitions, 3214 flow. Second operand 105 states and 99332 transitions. [2022-07-21 08:55:18,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1310 places, 1128 transitions, 4122 flow [2022-07-21 08:55:18,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1237 places, 1128 transitions, 3770 flow, removed 21 selfloop flow, removed 73 redundant places. [2022-07-21 08:55:18,687 INFO L242 Difference]: Finished difference. Result has 1237 places, 1064 transitions, 3156 flow [2022-07-21 08:55:18,688 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1195, PETRI_DIFFERENCE_MINUEND_FLOW=2866, PETRI_DIFFERENCE_MINUEND_PLACES=1133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1055, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=961, PETRI_DIFFERENCE_SUBTRAHEND_STATES=105, PETRI_FLOW=3156, PETRI_PLACES=1237, PETRI_TRANSITIONS=1064} [2022-07-21 08:55:18,688 INFO L279 CegarLoopForPetriNet]: 1056 programPoint places, 181 predicate places. [2022-07-21 08:55:18,688 INFO L495 AbstractCegarLoop]: Abstraction has has 1237 places, 1064 transitions, 3156 flow [2022-07-21 08:55:18,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 946.9461538461538) internal successors, (123103), 130 states have internal predecessors, (123103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:18,701 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:55:18,701 INFO L200 CegarLoopForPetriNet]: trace histogram [35, 35, 35, 35, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:55:18,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-07-21 08:55:18,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:55:18,916 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:55:18,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:55:18,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1964619998, now seen corresponding path program 1 times [2022-07-21 08:55:18,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:55:18,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227877773] [2022-07-21 08:55:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:18,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:55:18,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:55:18,964 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:55:18,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:55:19,041 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:55:19,042 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:55:19,042 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:55:19,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:55:19,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2022-07-21 08:55:19,042 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:55:19,042 WARN L231 ceAbstractionStarter]: 34 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:55:19,043 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 35 thread instances. [2022-07-21 08:55:19,097 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:55:19,101 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1085 places, 1228 transitions, 3821 flow [2022-07-21 08:55:20,413 INFO L129 PetriNetUnfolder]: 354/2588 cut-off events. [2022-07-21 08:55:20,413 INFO L130 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2022-07-21 08:55:20,538 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3324 conditions, 2588 events. 354/2588 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 9842 event pairs, 0 based on Foata normal form. 0/2162 useless extension candidates. Maximal degree in co-relation 3186. Up to 72 conditions per place. [2022-07-21 08:55:20,538 INFO L82 GeneralOperation]: Start removeDead. Operand has 1085 places, 1228 transitions, 3821 flow [2022-07-21 08:55:20,590 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1085 places, 1228 transitions, 3821 flow [2022-07-21 08:55:20,591 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:55:20,591 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@64433182, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@640f0f0 [2022-07-21 08:55:20,591 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:55:20,595 INFO L129 PetriNetUnfolder]: 4/89 cut-off events. [2022-07-21 08:55:20,595 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:55:20,595 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:55:20,595 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] [2022-07-21 08:55:20,595 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:55:20,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:55:20,595 INFO L85 PathProgramCache]: Analyzing trace with hash -646579162, now seen corresponding path program 1 times [2022-07-21 08:55:20,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:55:20,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086586598] [2022-07-21 08:55:20,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:20,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:55:20,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:20,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:20,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:55:20,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086586598] [2022-07-21 08:55:20,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086586598] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:55:20,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:55:20,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:55:20,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138336483] [2022-07-21 08:55:20,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:55:20,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:55:20,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:55:20,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:55:20,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:55:20,619 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 978 out of 1228 [2022-07-21 08:55:20,620 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1085 places, 1228 transitions, 3821 flow. Second operand has 2 states, 2 states have (on average 978.5) internal successors, (1957), 2 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:20,620 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:55:20,620 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 978 of 1228 [2022-07-21 08:55:20,620 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:55:21,723 INFO L129 PetriNetUnfolder]: 0/2198 cut-off events. [2022-07-21 08:55:21,724 INFO L130 PetriNetUnfolder]: For 8365/8365 co-relation queries the response was YES. [2022-07-21 08:55:21,724 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2970 conditions, 2198 events. 0/2198 cut-off events. For 8365/8365 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 9490 event pairs, 0 based on Foata normal form. 3722/5848 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-07-21 08:55:21,728 INFO L132 encePairwiseOnDemand]: 1014/1228 looper letters, 35 selfloop transitions, 0 changer transitions 12/1013 dead transitions. [2022-07-21 08:55:21,728 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1085 places, 1013 transitions, 3461 flow [2022-07-21 08:55:21,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:55:21,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:55:21,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2205 transitions. [2022-07-21 08:55:21,730 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8978013029315961 [2022-07-21 08:55:21,730 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2205 transitions. [2022-07-21 08:55:21,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2205 transitions. [2022-07-21 08:55:21,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:55:21,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2205 transitions. [2022-07-21 08:55:21,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1102.5) internal successors, (2205), 2 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:21,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1228.0) internal successors, (3684), 3 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:21,733 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1228.0) internal successors, (3684), 3 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:21,733 INFO L186 Difference]: Start difference. First operand has 1085 places, 1228 transitions, 3821 flow. Second operand 2 states and 2205 transitions. [2022-07-21 08:55:21,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1085 places, 1013 transitions, 3461 flow [2022-07-21 08:55:21,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1085 places, 1013 transitions, 2271 flow, removed 595 selfloop flow, removed 0 redundant places. [2022-07-21 08:55:21,748 INFO L242 Difference]: Finished difference. Result has 1085 places, 1001 transitions, 2177 flow [2022-07-21 08:55:21,748 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1228, PETRI_DIFFERENCE_MINUEND_FLOW=2201, PETRI_DIFFERENCE_MINUEND_PLACES=1084, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1013, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1013, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2177, PETRI_PLACES=1085, PETRI_TRANSITIONS=1001} [2022-07-21 08:55:21,749 INFO L279 CegarLoopForPetriNet]: 1085 programPoint places, 0 predicate places. [2022-07-21 08:55:21,749 INFO L495 AbstractCegarLoop]: Abstraction has has 1085 places, 1001 transitions, 2177 flow [2022-07-21 08:55:21,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 978.5) internal successors, (1957), 2 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:21,749 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:55:21,749 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] [2022-07-21 08:55:21,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2022-07-21 08:55:21,750 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:55:21,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:55:21,750 INFO L85 PathProgramCache]: Analyzing trace with hash -939982169, now seen corresponding path program 1 times [2022-07-21 08:55:21,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:55:21,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146893966] [2022-07-21 08:55:21,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:21,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:55:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:21,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:21,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:55:21,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146893966] [2022-07-21 08:55:21,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146893966] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:55:21,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:55:21,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:55:21,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921401291] [2022-07-21 08:55:21,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:55:21,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:55:21,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:55:21,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:55:21,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:55:21,783 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 971 out of 1228 [2022-07-21 08:55:21,784 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1085 places, 1001 transitions, 2177 flow. Second operand has 3 states, 3 states have (on average 972.0) internal successors, (2916), 3 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:21,784 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:55:21,784 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 971 of 1228 [2022-07-21 08:55:21,784 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:55:22,722 INFO L129 PetriNetUnfolder]: 0/1753 cut-off events. [2022-07-21 08:55:22,723 INFO L130 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-07-21 08:55:22,723 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2110 conditions, 1753 events. 0/1753 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6283 event pairs, 0 based on Foata normal form. 0/1718 useless extension candidates. Maximal degree in co-relation 0. Up to 210 conditions per place. [2022-07-21 08:55:22,725 INFO L132 encePairwiseOnDemand]: 1225/1228 looper letters, 44 selfloop transitions, 2 changer transitions 0/1005 dead transitions. [2022-07-21 08:55:22,726 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1075 places, 1005 transitions, 2277 flow [2022-07-21 08:55:22,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:55:22,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:55:22,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2960 transitions. [2022-07-21 08:55:22,728 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8034744842562432 [2022-07-21 08:55:22,728 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2960 transitions. [2022-07-21 08:55:22,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2960 transitions. [2022-07-21 08:55:22,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:55:22,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2960 transitions. [2022-07-21 08:55:22,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 986.6666666666666) internal successors, (2960), 3 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:22,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1228.0) internal successors, (4912), 4 states have internal predecessors, (4912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:22,732 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1228.0) internal successors, (4912), 4 states have internal predecessors, (4912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:22,732 INFO L186 Difference]: Start difference. First operand has 1085 places, 1001 transitions, 2177 flow. Second operand 3 states and 2960 transitions. [2022-07-21 08:55:22,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1075 places, 1005 transitions, 2277 flow [2022-07-21 08:55:22,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1075 places, 1005 transitions, 2277 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:55:22,741 INFO L242 Difference]: Finished difference. Result has 1076 places, 1002 transitions, 2189 flow [2022-07-21 08:55:22,742 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1228, PETRI_DIFFERENCE_MINUEND_FLOW=2177, PETRI_DIFFERENCE_MINUEND_PLACES=1073, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1001, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=999, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2189, PETRI_PLACES=1076, PETRI_TRANSITIONS=1002} [2022-07-21 08:55:22,742 INFO L279 CegarLoopForPetriNet]: 1085 programPoint places, -9 predicate places. [2022-07-21 08:55:22,742 INFO L495 AbstractCegarLoop]: Abstraction has has 1076 places, 1002 transitions, 2189 flow [2022-07-21 08:55:22,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 972.0) internal successors, (2916), 3 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:22,742 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:55:22,743 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:55:22,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2022-07-21 08:55:22,743 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:55:22,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:55:22,743 INFO L85 PathProgramCache]: Analyzing trace with hash -659830176, now seen corresponding path program 1 times [2022-07-21 08:55:22,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:55:22,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167752649] [2022-07-21 08:55:22,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:22,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:55:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:22,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:55:22,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167752649] [2022-07-21 08:55:22,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167752649] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:55:22,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606948032] [2022-07-21 08:55:22,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:22,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:55:22,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:55:22,781 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:55:22,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-07-21 08:55:23,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:23,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:55:23,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:55:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:23,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:55:23,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:23,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606948032] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:55:23,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:55:23,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:55:23,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816919618] [2022-07-21 08:55:23,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:55:23,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:55:23,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:55:23,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:55:23,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:55:23,903 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 970 out of 1228 [2022-07-21 08:55:23,905 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1076 places, 1002 transitions, 2189 flow. Second operand has 10 states, 10 states have (on average 972.3) internal successors, (9723), 10 states have internal predecessors, (9723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:23,905 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:55:23,905 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 970 of 1228 [2022-07-21 08:55:23,906 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:55:24,976 INFO L129 PetriNetUnfolder]: 0/1727 cut-off events. [2022-07-21 08:55:24,977 INFO L130 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-07-21 08:55:24,977 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2189 conditions, 1727 events. 0/1727 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6126 event pairs, 0 based on Foata normal form. 2/1729 useless extension candidates. Maximal degree in co-relation 0. Up to 135 conditions per place. [2022-07-21 08:55:24,980 INFO L132 encePairwiseOnDemand]: 1222/1228 looper letters, 45 selfloop transitions, 9 changer transitions 0/1012 dead transitions. [2022-07-21 08:55:24,980 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1084 places, 1012 transitions, 2319 flow [2022-07-21 08:55:24,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:55:24,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:55:24,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8786 transitions. [2022-07-21 08:55:24,985 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7949692363373145 [2022-07-21 08:55:24,985 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8786 transitions. [2022-07-21 08:55:24,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8786 transitions. [2022-07-21 08:55:24,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:55:24,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8786 transitions. [2022-07-21 08:55:24,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 976.2222222222222) internal successors, (8786), 9 states have internal predecessors, (8786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:24,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1228.0) internal successors, (12280), 10 states have internal predecessors, (12280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:24,996 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1228.0) internal successors, (12280), 10 states have internal predecessors, (12280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:24,996 INFO L186 Difference]: Start difference. First operand has 1076 places, 1002 transitions, 2189 flow. Second operand 9 states and 8786 transitions. [2022-07-21 08:55:24,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1084 places, 1012 transitions, 2319 flow [2022-07-21 08:55:25,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1083 places, 1012 transitions, 2317 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:55:25,007 INFO L242 Difference]: Finished difference. Result has 1086 places, 1008 transitions, 2237 flow [2022-07-21 08:55:25,007 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1228, PETRI_DIFFERENCE_MINUEND_FLOW=2187, PETRI_DIFFERENCE_MINUEND_PLACES=1075, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1002, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=996, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2237, PETRI_PLACES=1086, PETRI_TRANSITIONS=1008} [2022-07-21 08:55:25,007 INFO L279 CegarLoopForPetriNet]: 1085 programPoint places, 1 predicate places. [2022-07-21 08:55:25,008 INFO L495 AbstractCegarLoop]: Abstraction has has 1086 places, 1008 transitions, 2237 flow [2022-07-21 08:55:25,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 972.3) internal successors, (9723), 10 states have internal predecessors, (9723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:25,008 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:55:25,009 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] [2022-07-21 08:55:25,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-07-21 08:55:25,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:55:25,231 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:55:25,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:55:25,231 INFO L85 PathProgramCache]: Analyzing trace with hash 483285013, now seen corresponding path program 1 times [2022-07-21 08:55:25,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:55:25,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505842245] [2022-07-21 08:55:25,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:25,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:55:25,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:25,281 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:25,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:55:25,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505842245] [2022-07-21 08:55:25,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505842245] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:55:25,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131439289] [2022-07-21 08:55:25,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:25,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:55:25,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:55:25,283 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:55:25,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-07-21 08:55:26,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:26,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:55:26,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:55:26,257 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:26,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:55:26,327 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:26,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131439289] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:55:26,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:55:26,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:55:26,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442050902] [2022-07-21 08:55:26,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:55:26,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:55:26,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:55:26,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:55:26,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:55:26,335 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 970 out of 1228 [2022-07-21 08:55:26,339 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1086 places, 1008 transitions, 2237 flow. Second operand has 18 states, 18 states have (on average 972.6111111111111) internal successors, (17507), 18 states have internal predecessors, (17507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:26,340 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:55:26,340 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 970 of 1228 [2022-07-21 08:55:26,340 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:55:27,455 INFO L129 PetriNetUnfolder]: 0/1675 cut-off events. [2022-07-21 08:55:27,456 INFO L130 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2022-07-21 08:55:27,456 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2398 conditions, 1675 events. 0/1675 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5778 event pairs, 0 based on Foata normal form. 4/1679 useless extension candidates. Maximal degree in co-relation 0. Up to 119 conditions per place. [2022-07-21 08:55:27,459 INFO L132 encePairwiseOnDemand]: 1222/1228 looper letters, 53 selfloop transitions, 21 changer transitions 0/1032 dead transitions. [2022-07-21 08:55:27,459 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1106 places, 1032 transitions, 2493 flow [2022-07-21 08:55:27,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:55:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:55:27,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20448 transitions. [2022-07-21 08:55:27,468 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7929269427640763 [2022-07-21 08:55:27,469 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 20448 transitions. [2022-07-21 08:55:27,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 20448 transitions. [2022-07-21 08:55:27,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:55:27,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 20448 transitions. [2022-07-21 08:55:27,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 973.7142857142857) internal successors, (20448), 21 states have internal predecessors, (20448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:27,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1228.0) internal successors, (27016), 22 states have internal predecessors, (27016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:27,498 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1228.0) internal successors, (27016), 22 states have internal predecessors, (27016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:27,498 INFO L186 Difference]: Start difference. First operand has 1086 places, 1008 transitions, 2237 flow. Second operand 21 states and 20448 transitions. [2022-07-21 08:55:27,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1106 places, 1032 transitions, 2493 flow [2022-07-21 08:55:27,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1105 places, 1032 transitions, 2479 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:55:27,509 INFO L242 Difference]: Finished difference. Result has 1110 places, 1021 transitions, 2361 flow [2022-07-21 08:55:27,509 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1228, PETRI_DIFFERENCE_MINUEND_FLOW=2231, PETRI_DIFFERENCE_MINUEND_PLACES=1085, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1008, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=997, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2361, PETRI_PLACES=1110, PETRI_TRANSITIONS=1021} [2022-07-21 08:55:27,509 INFO L279 CegarLoopForPetriNet]: 1085 programPoint places, 25 predicate places. [2022-07-21 08:55:27,510 INFO L495 AbstractCegarLoop]: Abstraction has has 1110 places, 1021 transitions, 2361 flow [2022-07-21 08:55:27,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 972.6111111111111) internal successors, (17507), 18 states have internal predecessors, (17507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:27,511 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:55:27,511 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:55:27,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-07-21 08:55:27,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-07-21 08:55:27,733 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:55:27,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:55:27,733 INFO L85 PathProgramCache]: Analyzing trace with hash 794569099, now seen corresponding path program 1 times [2022-07-21 08:55:27,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:55:27,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278943498] [2022-07-21 08:55:27,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:27,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:55:27,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:27,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:55:27,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278943498] [2022-07-21 08:55:27,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278943498] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:55:27,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031344754] [2022-07-21 08:55:27,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:27,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:55:27,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:55:27,832 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:55:27,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-07-21 08:55:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:28,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:55:28,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:55:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:28,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:55:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:29,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031344754] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:55:29,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:55:29,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:55:29,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716823092] [2022-07-21 08:55:29,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:55:29,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:55:29,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:55:29,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:55:29,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:55:29,070 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 970 out of 1228 [2022-07-21 08:55:29,079 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1110 places, 1021 transitions, 2361 flow. Second operand has 34 states, 34 states have (on average 972.7941176470588) internal successors, (33075), 34 states have internal predecessors, (33075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:29,080 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:55:29,080 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 970 of 1228 [2022-07-21 08:55:29,080 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:55:30,407 INFO L129 PetriNetUnfolder]: 0/1571 cut-off events. [2022-07-21 08:55:30,408 INFO L130 PetriNetUnfolder]: For 816/816 co-relation queries the response was YES. [2022-07-21 08:55:30,408 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2517 conditions, 1571 events. 0/1571 cut-off events. For 816/816 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5086 event pairs, 0 based on Foata normal form. 8/1579 useless extension candidates. Maximal degree in co-relation 0. Up to 87 conditions per place. [2022-07-21 08:55:30,411 INFO L132 encePairwiseOnDemand]: 1222/1228 looper letters, 69 selfloop transitions, 45 changer transitions 0/1072 dead transitions. [2022-07-21 08:55:30,411 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1154 places, 1072 transitions, 2905 flow [2022-07-21 08:55:30,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 08:55:30,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-21 08:55:30,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 43772 transitions. [2022-07-21 08:55:30,429 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.792110025334781 [2022-07-21 08:55:30,429 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 43772 transitions. [2022-07-21 08:55:30,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 43772 transitions. [2022-07-21 08:55:30,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:55:30,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 43772 transitions. [2022-07-21 08:55:30,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 972.7111111111111) internal successors, (43772), 45 states have internal predecessors, (43772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:30,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1228.0) internal successors, (56488), 46 states have internal predecessors, (56488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:30,604 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1228.0) internal successors, (56488), 46 states have internal predecessors, (56488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:30,605 INFO L186 Difference]: Start difference. First operand has 1110 places, 1021 transitions, 2361 flow. Second operand 45 states and 43772 transitions. [2022-07-21 08:55:30,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1154 places, 1072 transitions, 2905 flow [2022-07-21 08:55:30,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1148 places, 1072 transitions, 2865 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-21 08:55:30,617 INFO L242 Difference]: Finished difference. Result has 1157 places, 1046 transitions, 2639 flow [2022-07-21 08:55:30,618 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1228, PETRI_DIFFERENCE_MINUEND_FLOW=2337, PETRI_DIFFERENCE_MINUEND_PLACES=1104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1021, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=998, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2639, PETRI_PLACES=1157, PETRI_TRANSITIONS=1046} [2022-07-21 08:55:30,618 INFO L279 CegarLoopForPetriNet]: 1085 programPoint places, 72 predicate places. [2022-07-21 08:55:30,618 INFO L495 AbstractCegarLoop]: Abstraction has has 1157 places, 1046 transitions, 2639 flow [2022-07-21 08:55:30,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 972.7941176470588) internal successors, (33075), 34 states have internal predecessors, (33075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:30,622 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:55:30,622 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:55:30,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-07-21 08:55:30,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-07-21 08:55:30,839 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:55:30,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:55:30,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1116802215, now seen corresponding path program 1 times [2022-07-21 08:55:30,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:55:30,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675259949] [2022-07-21 08:55:30,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:30,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:55:30,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:31,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:55:31,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675259949] [2022-07-21 08:55:31,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675259949] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:55:31,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725163785] [2022-07-21 08:55:31,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:31,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:55:31,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:55:31,101 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:55:31,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-07-21 08:55:32,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:32,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 08:55:32,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:55:32,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:32,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:55:32,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:32,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725163785] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:55:32,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:55:32,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-21 08:55:32,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278278270] [2022-07-21 08:55:32,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:55:32,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-21 08:55:32,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:55:32,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-21 08:55:32,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-21 08:55:32,924 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 970 out of 1228 [2022-07-21 08:55:32,942 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1157 places, 1046 transitions, 2639 flow. Second operand has 66 states, 66 states have (on average 972.8939393939394) internal successors, (64211), 66 states have internal predecessors, (64211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:32,942 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:55:32,942 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 970 of 1228 [2022-07-21 08:55:32,942 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:55:34,837 INFO L129 PetriNetUnfolder]: 0/1363 cut-off events. [2022-07-21 08:55:34,837 INFO L130 PetriNetUnfolder]: For 2708/2708 co-relation queries the response was YES. [2022-07-21 08:55:34,837 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2375 conditions, 1363 events. 0/1363 cut-off events. For 2708/2708 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3723 event pairs, 0 based on Foata normal form. 16/1379 useless extension candidates. Maximal degree in co-relation 0. Up to 66 conditions per place. [2022-07-21 08:55:34,840 INFO L132 encePairwiseOnDemand]: 1222/1228 looper letters, 101 selfloop transitions, 93 changer transitions 0/1152 dead transitions. [2022-07-21 08:55:34,840 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1249 places, 1152 transitions, 3875 flow [2022-07-21 08:55:34,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-21 08:55:34,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-21 08:55:34,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 90420 transitions. [2022-07-21 08:55:34,877 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7917410948828413 [2022-07-21 08:55:34,877 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 90420 transitions. [2022-07-21 08:55:34,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 90420 transitions. [2022-07-21 08:55:34,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:55:34,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 90420 transitions. [2022-07-21 08:55:34,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 972.258064516129) internal successors, (90420), 93 states have internal predecessors, (90420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:34,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1228.0) internal successors, (115432), 94 states have internal predecessors, (115432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:35,016 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1228.0) internal successors, (115432), 94 states have internal predecessors, (115432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:35,016 INFO L186 Difference]: Start difference. First operand has 1157 places, 1046 transitions, 2639 flow. Second operand 93 states and 90420 transitions. [2022-07-21 08:55:35,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1249 places, 1152 transitions, 3875 flow [2022-07-21 08:55:35,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1231 places, 1152 transitions, 3787 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-07-21 08:55:35,034 INFO L242 Difference]: Finished difference. Result has 1248 places, 1095 transitions, 3273 flow [2022-07-21 08:55:35,035 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1228, PETRI_DIFFERENCE_MINUEND_FLOW=2583, PETRI_DIFFERENCE_MINUEND_PLACES=1139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1046, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=999, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3273, PETRI_PLACES=1248, PETRI_TRANSITIONS=1095} [2022-07-21 08:55:35,035 INFO L279 CegarLoopForPetriNet]: 1085 programPoint places, 163 predicate places. [2022-07-21 08:55:35,035 INFO L495 AbstractCegarLoop]: Abstraction has has 1248 places, 1095 transitions, 3273 flow [2022-07-21 08:55:35,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 972.8939393939394) internal successors, (64211), 66 states have internal predecessors, (64211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:35,042 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:55:35,042 INFO L200 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:55:35,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-07-21 08:55:35,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-07-21 08:55:35,257 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:55:35,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:55:35,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1343951775, now seen corresponding path program 1 times [2022-07-21 08:55:35,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:55:35,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320237020] [2022-07-21 08:55:35,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:35,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:55:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:35,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:55:35,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320237020] [2022-07-21 08:55:35,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320237020] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:55:35,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440500514] [2022-07-21 08:55:35,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:35,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:55:35,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:55:35,890 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:55:35,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-07-21 08:55:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:55:36,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-21 08:55:36,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:55:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:37,133 INFO L328 TraceCheckSpWp]: Computing backward predicates...